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Institute
- Extern (67)
A multi-part theorem is presented concerning the morphogenesis of high-symmetry structures made of three-dimensional morphological units (MU's) free to move on the surface of a sphere. All parts of each MU interact non-specifically with the remainder of the structure, via an isotropic function of distance. Summing all interactions gives a net figure of merit, X, that depends upon MU positions and orientations. The structure evolves via gradient dynamics, each MU moving down the local gradient of I. The analysis is reresented with generality in Fourier space, which eases the expression of symmetry. Structures near symmetry, but far from a local minimum of I, are analyzed. For each, a symmetrical configuration can be found, for which X is an extremum with respect to symmetry-breaking perturbations. Under gradient dynamics, a quadratic measure of such deviations from symmetry decreases monotonically, anywhere in the large basin of attraction of a local minimum. Thus: high symmetry is an attractor. Application is made to icosahedral virus capsids. The Symmetrization Theorem shows that a stable capsid, maintained by non-specific interactions among its capsomeres, could arise generically in a "bottom-up" process. For animated evolutions that selfassemble into high symmetry, visit http://www.albany.edu/~cmarzec/
The larvae of Orthocladiinae (Diptera: Chironomidae) of the Holarctic region : keys and diagnoses
(1983)
Material of the domestic fowl of appropriate ages, ranging from twelve hours' incubation to the adult bird, was prepared for the purpose of studying the production and development of the germ cells. The primordial germ cells arise in the extra-embryonic region anterior to the head fold in the region of the zone of junction during the primitive-streak stage. These germ cells migrate, through the blood stream, to the region of the future gonad, where they develop into the definitive germ plasm. There is no widespread degeneration of the primordial germ cells after their arrival in the gonadal region, nor is there any widespread transformation of somatic cells into definitive germ cells.
The theoretical concept of the biological species and the multidimensional species category, as currently applied by a majority of ornithologists and by many other biologists, replaced the typological-morphological species concept during the first half of this century and became a central tenet of the synthetic theory of evolution. The concept of biospecies is a 'horizontal' concept referring to contemporary reproductive communities at any particular period, e.g. the Recent period or any other time level of the geological past. Historical 'species' concepts as applied by cladists and palaeontologists refer to artificially delimited portions of 'vertical' phyletic lineages for which the application of the term 'species' causes severe problems. Discussions would be simplified if the concept and term 'species' was to be restricted to cross sections of phyletic lineages at any time level and a separate taxonomy outside the Linnaean system of genera and species was to be conceived to deal with phyletic lineages. Under each of the theoretical species concepts, species taxa are assigned broadly to intermediate or narrowly defined taxonomic species categories. Ornithologists of the 19th century applied morphological species concepts, emphasizing morphological character differences between species (rather than distinctness) and the fertility of con specific individuals (rather than the isolation from non-conspecific populations). Nearly all leading museum ornithologists in 19th-century Europe delineated monotypic Linnaean species, whereas the explorer-naturalists of the Gloger-Middendorff school (including Panas, Faber, Gloger, Nordmann, Middendorff, Schrenck, Radde, as well as Schlegel and Blasius) delimited widely circumscribed species taxa. Their researches in the vast territories of eastern Europe, Siberia and the Far East from the late 18th century to the 1880s and, in particular, their rich specimen material, demonstrated direct intergradation of many taxa (geographical varieties) of birds, thus revealing the conspecific nature of numerous narrowly conceived morphospecies previously described by museum workers. The ornithologists of the Gloger-Middendorff school also studied several conspicuous phenomena of geographical character variation in birds (and mammals) across Eurasia, especially plumage colouration (and pelage) and body size, but none of them was an evolutionist. They an adhered to a typological-creationist theoretical species concept. During the late 19th century, the museum specialists' taxonomic notion of narrow morphospecies dominated systematic ornithology in Europe, overtaking the work of the naturalists of the Gloger-Middendorff school, which fell into oblivion. The ornithologists of the Bairdian school in North America (Baird, Coues, Allen, Ridgway) further developed the concept of subspecies after the 1850s and especially from the 1870s onward. Their views were fully in accord with Darwin's theories of evolution' thus they defined the subspecies in a somewhat simplified manner as 'nascent species': These ornithologists were able to base their studies on collections of extensive specimen material which they had obtained during a series of exploring expeditions across the North American continent. Their studies led to the discovery of many aspects of both individual and geographic variation in birds. There are interesting historical similarities between the coinciding taxonomic interpretations and the comparable application of fairly broad limits of morphospecies by the North American ornithologists and the earlier exploring ornithologists in Europe, arrived at Independently by these, research groups, The study of specimens in 'series' (,suites'), beginninng with the naturalists of the Gloger-Middendorff school and, in particular, with the naturalists of the Bairdian school in North America, eventually led to the overcoming of the prevating typological view of variation and the development of 'population thinking'. Influenced by the work of Henry Seebohm in Britain and that of the North American ornithologists, Hartert in England and Kleinschmidt in Germany jointly succeeded in overcoming the strong opposition of the leadi.ng ornithologists in Europe during the 1890s and early 19008 and introduced a concept which soon developed into the biological species concept through the work of Stresemann, Rensch, and in particular, Ernst Mayr. Hopefully, ornithologists will continue the study of taxa at low, intermediate and high levels of microtaxonomic differentiation and will identify the subspecies groups, biological species and the biogeographical species in the world's avifaunas. Cladistic analyses will provide historical {'vertical'} overviews of phyletic lineages at different taxonomic levels.
The genus Maculinea van Eecke, 1915 (Lepidoptera: Lycaenidae) from the East Palaearctic Region
(1994)
We revise the classification of taxa belonging to the genus Maculinea from the East Palaearctic Region. In this region, in addition to the well-known three species: M. arion (Linnaeus, 1758), M. ationides (Staudinger, 1887) and M. teleius (Bergstriisser, [1779] 1778-1780), two additional species occur: M. alcon ([Denis & Schiffermiiller], 1775) (upper and middle Amur River, Primor'e, China Northeast/Manchuria and North Korea) and M. kurentzovi sp. nov. (upper and middle Amur River, Primor'e, China Northeast and North Korea). Lycaena kondakovi (Kurentzov, 1970) described from Primor'e is a composite species: the lectotype if' designated here represents an East-Asian subspecies of M. alcon, but its single paralectotype is a female to be assigned to M. kurentzovi sp. nov. Only limited numbers of specimens have been known with M. alcon kondakovi from lowlands of "Far-Eastern" Russia and China Northeast, but in North Korea we found a conspicuous allied taxon arirang nov. (female unknown), which we treat here as a highland subspecies of M. alcon but which may actually represent a good species. Of kurentzovi, we have found a series of specimens which have so far been mostly confused with M. teleius in various collections. We treat Glaucopsyche xiaheana Murayama, 1991 from western Gansu as a subspecies of M. arion along with other subspecies from the central and western parts of China: M. adon philidor (Fruhstorfer, 1915) from the east end of the Qilian Range as well as Mongolia, the type locality, and M. arion inferna nom. nov., a replacement name for Lycaena talsienluica (OberthUr, 1910) (praeoccupied) from Tibet, Sichuan and Qinghai. Because of the similarity of male genitalia and existence of intermediate forms, we regard M. sinalcon Murayama, 1992 described from Qinghai as a subspecies of M. teleius despite a few significant characteristics of the holotype. East continental Asia may be regarded as the headquarter of the genus Maculinea.
Introductory chapters on the geography, vegetation and history of botanical ex loration are followed by a catalogue of 331 species of wild vascular plants, 90% of which represent first records for the island. Synonymy, references, localities and ecological data are given for each species in a condensed form. The taxonomy, nomenclature and distribution of some taxa are discussed; in one case (Silene cythnia) a drawing and a distribution map are supplied. Nomenclatural novelties are validated in the genera Centaurea, Matricana, Melica (by W. Hempel) and Trifolium. A phytogeographical and ecological analysis of the flora demonstrates its striking banality and the unexpectedly high proportion of anthropophytes. No pliytogeographical link with tlie other E. Aegean Isiands and Anatolia exists, but there are some affinities with the Cyclades. The observations are consistent with the hypotliesis of a long insular isolation leading to a strong depletion or even destruction of the original flora, which has been replaced by long-distance dispersed and anthropophytic elements.
The primary subdivisions of the brain (telencephalon, diencephalon, mesencephalon, metencephalon, and myelencephalon) have similar relations and comparable functions in all vertebrates. Accordingly, the landmarksthat define their boundaries can be regarded as reliable for following their development. On the basis of a more complete series of well preserved embryos than has been available hitherto, we present evidence that the subdivisions of the adult brain can be traced back to neural-fold stages in which a series of growth centers can be recognized, differing from one another in form, size, and relations. The possibility of following the constrictions between the various subdivisions throughout development has been doubted by some, notably Hochstetter (1919). At present we are convinced that they can be distinguished if certain criteria are followed. These are: (a) constrictions involve the neural tube as a whole; (b) constrictions do not give rise primarily to any neural centers; (c) constrictions change in relative length and width, and in certain stages they become inconspicuous in models. The anatomical descriptions of progressive stages of development have important practical implications. It is known, for example, that congenital malformations of the central nervous system in man are common and that they are responsible for a substantial portion of fetal wastage as well as infant mortality and morbidity. In certain patients comprehensive clinical studies may indicate the underlying abnormality, such as dysraphism, arhinencephaly, hypoplasia of the cerebellum. or absence of the corpus callosum. In addition, anatomical examination of the affected brains may reveal in detail such abnormalities as lyssencephaly, polymicrogyria, or other cortical dysgeneses. These very complex cerebral malformations can only be understood and unraveled in the light of normal development. An investigation of early development of the brain must necessarily begin with a stage in which the major landmarks of the adult brain can be readily identified.As progressively younger stages are analyzed certain landmarks can no longer be recognized, although others persist at least to the third week of gestation. We believe that the evidence on which this study is based can be followed more satisfactorily in this inverted sequence, and the detailed description is so presented. It is followed by a summary of the sequence of events written in the conventional manner, as far as the eighth week of gestation.
Over 6260 fungi have been isolated from samples of feathers, nests, pellets, droppings, cloaca contents and visceral organs of 92 species of free-living birds in Czechoslovakia and Yugoslavia. Several species have been obtained of fungi pathogenic to homeotherms, poikilotherms and plants, and many fungi recorded belong to the toxinogenic species.Cellulolytic fungi have participated with 44.3 % in the total number of fungi, and keratinolytic fungi with 18.3 %. The thesis has been confirmed that habits (specific bionomics) of the birds influence,. to a certain degree, the distribution of the fungi among them. According to the results of this study, the fungi may conveniently be divided into three categories with respect to the character of their distribution and dispersal by free-living birds: (1) euryornithochous fungi , the occurrence of which in birds is undetermined by the birds' habits (ubiqitous species: Aspergillus flavus, Gliocladium roseum, Rhizopus. nigricans, Trichothecium roseum); (2) mesoornitohochorous fungi, the occurrence of which in birds is determined to a certain degree by the birds' habits (e. g., Aphanoascus fulvescens, Arthrodermcr curreyi, Chrysosporium keratinophilum, C. tropicum, Mucor hiemalis); (3) stenoornithochoruss fungi, which are associated with certain habit groups of the birds only (e. g., Aphanoascus terreus, Arthroderma ciferrii, A. tuberculatum,.Aspergillus fumigatus, Chrysosporium pannorum, Ctenomyces serratus). The importance of free-living birds in the spreading of pathogenic organisms has also been discussed from a more general point of view, particularly with regard to several epidemiologically important aspects of bird ecology such as synanthropism, migration (making possible a long-range carriage of pathogens or infected vectors), colonial breeding or mass roosting.
Birds are characterized by pneumatization of their skeletons by epithelial diverticula from larger, air-filled cavities. The diverticula-or 'air sacs'-that invade the postcranium result from outgrowths of the lungs; poslcranial pneumaticity has been very well studied. Much more poorly understood are the air sacs that pneumatize the skull. Study or craniofacial pneumaticity in modern birds (Neornithes) indicates the presence of two separate systems: nasal pneumaticity and tympanic pneumaticity, The lacrimal and maxillary bones arc pneumatized by diverticula of the main paranasal cavity, the antorbital sinus. There are five tympanic diverticula in neornithines that pneumatize the quadrate, articulare and the bones of the braincase. The pneumatic features of the following six genera of Mesozoic birds are examined: Archaeopteryx, Ellaliornis, Baplomis, Parahesperornis, Hesperornis and lchthyornis. Despite the 'archaic' aspect of most of these birds, many of the pneumatic features of neornithines are found in .Mesozoic birds and are considered primitive for Aves. The phylogenetic levels at which most of the avian pneumatic features arose within Archosauria are uncertain. Until the phylogenetic levels at which homologous pneumatic features arose are determined, it is unwise to use most pneumatic characters in the discussion of avian origins. Within avian phylogeny, Ornithurae and Neornithes are well-supported by pneumatic synapomorphies. There is a trend towards reduction of craniofacial pneumaticity within Hesperornithiformes. Witthin Neornithes, four derived pneumatic characters suggest that the Palaeognathae (ratites and tinamous) is monophyletic.
Dr. Nonfin (1931) in his book on the "Biology of the Amphibia", while discussing the inter-relationships of Pelobatidae, divides the family into Megophrynae, Pelobatinae and Sooglossinao und points out that among these three "the most primitive genus in the sub-family is the wide spread Megopluys or Megalophrys (including Leptobrachium)". ...
Paleogeographical, morphological, ecological, physiological, linguistic, archaeological and historical evidence is used to explain the origin and history of the domestication of the wild common carp. The closest wild ancestor of the common carp originated in the drainages of the Black, Caspian andAral seas and dispersed west as far as the Danube River and east into Siberia. The common carp today is represented by the uncertain east Asian subspecies Cyprinus carpio haematopterus and by the European Cyprinus carpio carpio. There is some reason to think that Romans were the first to culture carp collected from the Danube, and that the tradition of the "piscinae dulces" was continued in monasteries throughout the Middle Ages. We have much better documentation of carp culture in ponds of lay and clerical landowners in western Europe after the 11 th century. Distribution of the common carp west of the Danube's piedmont zone was clearly brought about by humans, as was its introduction throughout the continents. Some domestication in China may have occurred independently of similar activities in Europe, but most of the modern-day activities with the common carp in far east Asia are restricted to the domesticated common carp imported from Europe, or at best to hybrids of local and imported strains. The xanthic (red) common carp seem to have first appeared in early cultures of Europe, China and Japan but reached their fame through recent artificial selection of multicolored aberrants in Niigata Prefecture of Japan. In monetary value, production of the colored carp - the Japanese "nishikigoi" - now exceeds the production of carp as human food. As "swimming flowers" nishikigoi delight modem people as much as the taste of carp may have delighted the Romans and medieval folks at the beginning of carp domestication. The common carp is not only the most important domesticated fish but contributes over I million metric tons to world aquaculture. The surviving wild forms of the common carp are threatened or close to the fate of the aurochs, the ancestor of cattle, which became extinct in 1627.
The family Cimicidae consists of 6 subfamilies, 23 genera, and 91 species. Nineteen new species names, one new species, and one new genus have been proposed since the monograph by Usinger was published in 1966. A checklist includes the world cimicid fauna with sinonymy. A selected bibliography is concerned with cimicids as potential disease vectors; the bibliography is a comprehensive treatment of the cimicid literature of the Americas and islands of the Pacific, Atlantic and Indian Oceans.
The avifauna of the island of Flores and its satellite islands from Komodo to Alor is reviewed, combining historical data with recent observations. Recent surveys have added substantially to the data base, especially of the resident forest species, and endangered and endemic taxa, as well as adding a number of migrant and maritime species to the island list. Of particular interest are the rare forest endemics Wallace's Hanging-parrot Loriculus flosculus, the almost unknown Flores Scopsowl Otus alfredi, Flores Monarch Monarcha sacerdotum and Flores Crow Corvus florensis. An appeal is made for further surveys over the eastern part of the island and the eastern island chain.
The birds of Billiton Island
(1937)
Epilabidocera amphitrites is one of the most common copepods in the deep waters adjacent to Friday Harbor and shows characteristic swarming behavior in the surface film of the water from later spring through early summer. That the swarms are composed mainly, up to 99 %, of adult males appears to be due to difference in phototaxis to a weak light. This species, at least in copepodid stages, is omnivorous, but seems to prefer an animal diet rather than diatoms. Reproduction takes place continuously from early spring through autumn. The external anatomy of both the female and male has been described in detail. The cuticle forming the arthrodial membrane and the lining of the esophagus, hindgut, and hypostomal and labral troughs appears to be of the same nature throughout, consisting of a single stratum. The cuticle on the general body surface, however, consists of two main strata. The endoskeletal structures consist of two categories, the endoskeleton proper and the endoskeletal tendons. The former involves apodemes and apophyses. Of these the major ones are described in detail. The latter consist of two median tendinous endosternites in the « head », four pairs of ventral intersegmental thoracic tendons, and a pair of dorsal longitudinal tendons in the metasome. The endosternites are well developed, serving as origins for dilators to the atrium oris and esophagus and also for a number of extrinsic muscles to the head appendages. The skeletomusculature may be divided into longitudinal trunk and limb muscles. The paired dorsal and ventral longitudinal trunk muscles in the metasome extend, respectively, from the levels of the cervical groove and the post-maxillulary apodeme to the end of the metasome. The longitudinal trunk muscles in the urosome origate at the anterior end and run most of its length. They are arranged as paired dorsal and ventral groups and a pair of lateral muscles. The extrinsic limb muscles are described in detail. They originate either from the lateral to dorsal exoskeleton or from the endosternites. The digestive tract starts with the atrium oris in the oral cone, followed by the mouth proper, esophagus, midgut, and finally by the hindgut which opens as the anus at the end of the urosome. The oral cone consisting of the three lobed labrum and the paired paragnaths has a longitudinal groove, the oral groove, which is covered ventrally by the spinulose setae of the maxillae and laterally by the gnathobasal endites of the maxillules, these together forming an effective feeding apparatus. The midgut is produced anteriorly into a diverticulum which is higly secretory. In the middle portion of the midgut the epithelial cells are highly vacuolated. As they pass through this vacuolated region the gut contents are cemented into fecal pellets by a mucous secretion and they acquire a peritrophic membrane. There is a strong valve between the midgut and the hindgut. Peristalsis in the midgut is irregular but powerful and primarily in the reverse direction. The circulatory system involves a single heart, enclosed in a large pericardial space, and an anteriorly directed aorta terminating in an anterodorsal aortic sines. The latter communicates through three paires of openings with the sinuses in the head, which are in turn continuous with the perivisceral cavity, from which blood is returned to the pericardium. The heart has the form of a flask with an aortic valve at the tapered anterior end and a posterior ostium. The aortic wall is continued posteriorly over the heart and wraps around the anterior three-fifths as an outer membrane. This outer membrane is extended dorsally at three places to attach the heart to the dorsal exoskeleton; and it is also drawn out ventrally to form the anterior and lateral walls of the pericardium. These walls are continuous with the pericardial floor which seals the pericardia! cavity from the perivisceral cavity. The heart-beat and the blood flow through the system have been discussed. The excretory system consists of a pair of maxillary glands, each comprising a coelomic end-sac, a coelomic secretory tubule and an ectodermal excretory duct. The end-sac communicates with the tubule through a valvular opening. Antennary glands are not gound either in the nauplius stage or in the adult. The male reproductive system consists of a single testis and a single genital duct which is divided into four differentiated sections, the vas deferens, the seminal vesicle, the spermatophore sac, and the ductus ejaculatorius. The vas deferens is a thick-walled glandular tube secreting the various constituents of the spermatophore. The seminal vesicle serves mainly as a reservoir for the various components of a definitive spermatophore, and it is here that these take up their final positions. The spermatophore sac is highly glandular and is mainly responsible for formation of the coupling apparatus of the spermatophore. The spermatophore is not open directly to the outside but is connected with a canal system in the coupling apparatus. When transferred to the female genital segment at copulation, the central secretion of the spermatophore is discharged through the canal system of the coupling apparatus to glue down the spermatophore. A duct through which the spermatozoa can pass from the spermatophore to the spermathecae of the female appears to be formed later by an action of the female, possibly secretion of an enzyme or lysin. The discharge of the contents of the spermatophore is effected by swelling of Q-spermatozoa in the distal region of the spermatophore. The functional spermatozoa are spherical or polygonal and nonmotile. The female reproductive system consists of a single ovary, two oviducts, each with several diverticula, leading to the paired opnenings into the vaginal vacity, a pair of spermathecae and a pair of glands which open into the oviducts. In the mature female the oviducts are wide and sac-like, expanded by growing oocytes. However, the last portion of the oviduct is usually empty of eggs and is highly secretory. The oldest oocytes in the oviducts are usually at the metaphase of the first maturation division. The evidence points to the conclusion that the eggs are laid in this stage, and they are fertilized when they pass through the vaginal cavity. Oogenesis has been studied in detail. There are two periods of yolk formation: the first immediately after the dispersion of the mitochondrial bodies and the second in the last phase of the oocyte growth when the vacuoles in the cytoplasm are gradually replaced by yolk. Two dorsal ocelli, in the copepodid stages, are placed dorsolaterally against the exoskeleton and highly developed, each with a perfectly spherical, cuticular lens, while a single ventral ocellus remains unspecialized through the copepodid stages. Each dorsal ocellus proper is suspended in the head sinus by several connective tissue stands in addition to an aye muscle and consists of a large, syncytial pigmented cup occupied by a cellular sphere which is composed of 9 retinular and 4 crystalline cells. Each of the 9 retinular cells gives off an axon which leaves the ocellar cup at one of three places to proceed to the nauplius eye center in the protocerebrum. The ventral ocellus consists of two multinucleated pigmented cells, a cup-shaped tapetum, 6 retinular cells and about 8 conjunctival cells. Each of the 6 retinular cells sends an axon which loops over the posterior rim of the ocellar cup in common with the others to course to the nauplius eye center in the protocerebrum. The ventral ocellus is innervated by two afferent nerve fibers. There is also found a pair of conspicuous nerve fibers, possibly afferent, associated with the dorsal and ventral ocelli. A pair of accessory retinular groups, each consisting of three retinular cells, is found posterior to the dorsal ocelli. Three efferent aXOl1S from each group form a nerve running to the nauplius eye center in the protocerebrum. A pair of frontal organs, each innervated by a frontal nerve, lies in the anterior end of the head. The frontal nerves can be traced up to a pair of neuropiles immerdiately ventral to the nauplius eye center in the proto cerebrum. A pair of suprafrontal nerves branched off from the frontal nerves is found to innervate a pair of sensory filaments, the suprafrontal sensiIla, at the lower anterior end of the head. The central nervous system, consisting of a well developed brain connected by massive circumesophageaI connectives to the ventral nerve cord, has been described in detail. The ganglion cells are found throughout the nerve cord, and they are arranged into ganglia in the thoracic segments bearing the swimming legs. The stomatogastric nervous system has two pairs of labral and a single gastric ganglia. The medial pair of the labral ganglia forms anteriorly a single ganglion which is connected to the brain by three small nerves. The giant fiber system, consisting of giant motor fibers and giant interneurons, has been studied in detail, and it appears to constitute the effector portion of an escape reflex. The cutaneous glands opening through small pores in the cuticle of the metasome, urosome, and the appendages have been described. Chromatophores, unicellular or syncytial with several nuclei, are scattered deep in the body and are responsible for the metachrosis.
A taxonomic review of the species belonging to Bembidion Latreille, 1802 of Australia includes a key and descriptions of the species. Noinenclatorial acts proposed in this paper include: 1, taxa of new Status - Bembidion subgenus Sloanephila Netolitzky, 1931, valid subgenus, not consubgeneric with subgenus Philochtus Stephens, 1828; B. (Notaphocampa) riverinae Sloane, 1894 valid species, not subspecies of B. opulentum Nietner, 1858; 2, new synonyms B. (Notaphominis Netolitzky, 1931) = B. (Notaphocampa Netolitzky, 1914): 3, New subgenera - Australoemphanes, and Gondwanabembidion, 4, New species - B. (Ananotaphus) daccordii (South Australia, Mound Springs); 5, new subspecies - B. (Zeactedium) orbiferum giachinoi (New ZeaIand, North Island); 6, species transferred to Australoemphanes - B . (Ananotaphus) blackburni Csiki, 1928; 7, Species transferred to Gondwanabembidion - B . (Ananotaphus) proprium Blackburn, 1888. Conclusions of an informal phylogeographic study are: 1, the Auslralian continent was probably populated by the Bembidiina with relatively recent (Late Tertiary-Quaternary) invasions from the north by tropical lineages, while other lineages showing systematic relationships with African and South American taxa probably have an older, Gondwanian origin; and 2, some lineagas of predominantly Nearctic and Palaearctic taxa were also Gondwanian in origin.
Oribatei (Acari, Cryptostigmata) are found in a variety of terrestrial habitats, and many are associatcd with lichens; the relationship ranges from casual to highly dependent. Eighty-three species associatcd with lichens have been surveyed, and a tentative classification, based on their ecological requirements, is presented: Group A consists of species restricted to lichens as a biotope, though occasionally occurring as accidenials in other habitats, Group B consists of species which while preferring lichens as a habitat and feeding source are also adapted to existence on other piants (though in some cases their immatures may be lichen-rescricted); Group C consists of species which, though frequently found on lichens, are equally common in other biotopes, particularly mosses, and must be regartled as much more generalized in their feeding habits. Certain aspects of oribatid-lichen specificity are discussed. The importance of orihatid-lichen associations from tihe polnt of view of soil fertility and energetics is empliasized.
During the last decade, three new acidophilous forests associations were detected in the Mecsek Mts (SW Hungary), and described as acidophilous beech wood (Sorbo torminalis-Fagetum (A. O. Horvat 1963a) Borhidi et Kevey in Kevey 2001), acido-mesophilous oak wood (Luzulo forsteri-Quercetum petraeae (A. O. Horvat 1963a) Borhidi et Kevey 1996) and acido-xerophilous oak shrubland (Genisto pilosae-Quercetum polycarpae (A. O. Horvat 1967) Borhidi et Kevey 1996). In this article two further new associations are described: the acidophilous oakwood of the Mecsek (Viscario-Quercetum polycarpae Kevey, ass. nova) and the acido-mesophilous oakwood of western Hungary (Campanulo rotundifoliae-Quercetum petraeae (Csapody 1964) Kevey, ass. nova). These associations are related to the acidophilous forests of the Balkan Peninsula based on the infrequent presence of sub-Mediterranean species. A detailed comparative study of these new associations with the earlier known ones permitted to develop a reshaped classification of the syntaxonomy of these units, creating four new suballiances: within the frame of Quercion farnetto I. Horvat 1938 the suballiances Luzulo forsteri-Quercenion polycarpae Kevey, suball. nova and the typical Quercenion farnetto Kevey, suball. nova, in the frame of Quercion petraeae Zolyomi et Jakucs 1957 the suballiances Luzulo multiflorae-Quercenion petraeae Kevey, suball. nova and the Quercenion petraeae Kevey, suball. nova.
Techniques for collecting, handling, preparing, storing and examining small molluscan specimens
(2007)
Micromolluscs are small-sized molluscs (< 5 mm), and include the great majority of undescribed molluscan taxa. Such species require special collecting, sorting and handling techniques and different storage requirements to those routinely used for larger specimens. Similarly, the preparation of shells, opercula, radulae and animals poses some challenges for scanning electron microscopy (SEM). An overview of experiences with various techniques is presented, both positive and negative. Issues discussed include those relating to storage of dry specimens and interaction of specimens with glass, gelatine and paper products, handling techniques and storage in various fluids. Techniques for cleaning shells for SEM are described and compared, as well as those for radular extraction. The interactions of chemicals used for the dissolution of tissue with calcareous micromolluscs are described. Methods for handling and mounting small radulae for SEM are detailed and brief guides to SEM and light photography are given. An appendix listing details of frequently-used chemicals is provided.
This study treats 76 species, in which 58 species and 14 genera are described as new. The species are arranged in 28 families and 56 genera. The oribatid or cryptostigmatid mites are cosmopolitan group of more than 6500 species relegated to approximate 700 genera and 134 families. The body length of most oribatid species ranges 300-1200 µ. The oribatid mites are darkly coloured and covered with a rigid exoskelecton. The life cycle consists of egg, larva, protonymph, tritonymph, deutonymph and adult. These mites are best known as inhabitants of litter and upper soil strata, their small size and shunning of light caused them to receive little attention for many years. In recently studies of soil fauna, it has been shown that is an economic importance for human, i.e. many species feed on surface plant detritus, and may therefore play a major role in maintaining the fertility of soils; they could become an indicator of soil physical and chemical characters. Some species have also been shown to act as vectors of various tapewonns; they feed almost exclusively on tyroglyphid mites and attack the parasitic hymenopteran, Polynotus zosini; and several species are associated with plant, they have been reported to damage the leaf, the foot and the stem of potato, strawberry, turlip, citrus and mushroom. Systematic studies of these mites are scarcely found in Taiwan. The present paper deals with 76 species, 56 genera in 28 families, among them, 58 species and 14 genera are described as new. The author hopes that this study constitutes an example to show that the wealth of fascinating information could be gained and also hopes that this finding might be useful for elucidating the taxonomy of oribatid mites in Taiwan.
This paper deals with the anthomyiid-flies from Korea. A total of 81 species belonging to 22 genera are represented in Korean fauna as the result, among them the following 9 species are proposed here new to science as: Anthomyia koreana sp. nov., Botanophila seungrnoi sp. nov., Acklandia koreacola sp. nov., Lasiomma monticola sp nov., Egle podulparia sp. nov., Delia expansa sp. nov., Phorbia soyosana sp. nov., P. dissimiiis sp. nov., P. taeguensis sp. nov., and 2 genera, Acklandia Hennig, 1976, Egle Robineau-Desvoidy, 1830, with the below 12 species are newly recorded from Korea as: Parapegomyia schineri, Nupedia debilis, Botanophila striolata, Egle muscaria, E. longipalpis, E. parvaeformis, E. panta, E. korpokkur, Paregle vetula, Delia tenuiventris, D. coronariae, Phorbia longipilis. Keys are given for all the taxa respectively, some illustrations of various characters for identification are provided. Arranged are host plants and domestic localities for each species.
Taxonomic diversity of European Cottus : with description of eight new species (Teleostei: Cottidae)
(2005)
The taxonomy of European species of Coitus (Cottidae) is revised. Results of molecular studies are summarised and the variability of morphological characters is reviewed. Molecular and morphological data support the recognition of 15 diagnosable species in Europe. A neotype is designated for C. gobio; the type locality is in the lower Elbe drainage. Coitus gobio, C. hispaniolensis, C. koshewnikowi, C. microstomus, C. petiti, and C. poecilopus are re-diagnosed. Eight new species are described. Three of them are restricted to France: C. aturi to the Adam drainage, C. duranii to the upper Dordogne, upper Lot and upper Loire drainages, and C. rondeleti to the Herault drainage. Two new species are described from the Atlantic and North Sea basins: C. perifretum from Great Britain, and the ScheIdt, Rhine, Seine, lower Loire and lower Garonne drainages, and C. rhenanus from the Meuse and lower and middle Rhine drainages. Coitus scatul'igo is described from a single spring in northeastern Italy. In the Danube drainage, C. mctae front the upper Save and C. transsilvaniae from the upper Arges are distinguished from the widespread C. gobio. Lectotypes are designated for C. ferrugineus and C. pellegrini. Coitus kosllewnikowi Gratzianow, 1907 is declared nomel1 protectum and C. gobio microcephalus Kessler, 1868 is declared nomen oblitum. The original spelling of C. milvensis is discussed.
The first key is completed for the Palaearctic Pristiphora Latereille, 1810 species. Pristiphora araratensis sp. n. is descdbed. Pristiphora kamtchatica Malaise, 1931, Pristiphora mesatlantica Lacourt, 1976 and Pristiphora amelanchieris (Takeuchi, 1922) are new synonyms of Pristiphora insularis Rohwer, 1910.
1. The migration of the spotted mackerel, Pneumatophorus tapeinacephalus distributing in the coastal sea of Japan was investigated in relation to the geographical distribution of the fishing grounds, seasonal change of fishing condition. sea conditions and fork length. Secondarily, some anatomical and histological observations were carried out on spotted mackerels caught in the coastal sea area around Kagoshima and its vicinity to clarify the sex differentiation and the seasonal cycle of the gonads. 2. Spotted mackerels are distributed throughout a wide sea area stretching from north of Formosa to the south of Japan Sea. including the Pacific coastal sea from Kyushu to Chiba Prefecture. The northern limit of the distribution area is assumed to be the sea areas off San-in and Chosi. 3. The schools of adult fish make a feeding migration to the circumference of Saishu Island and to the sea area off Ashizuri cape in summer. and these schools make a spawning migration toward the sea area around the Osumi Islands and the southern area of the East China Sea in winter. 4. In winter some schools of adult fish remain living in the sea area south of the Izu Islands. These schools belong to a group isolated incompletely from that of the East China Sea. as some of them are those which came from the East China Sea. 5. The larvae grow while they are being brought by the sea current or tide current. When they have reached 50~60mm. in total length. they aggregate in schools and approach the coast. In spring they swim in the coastal nursery grounds. 6. From summer to autumn, the schools of the young fish make a feeding migration to the sea off San-in and to the eastern coastal sea of Chiba Prefecture. In winter. they make a seasonal migration to the coastal sea of South Kyushu, the East China Sea and the southern sea area of the Izu Islands. 7. The range of vertical distribution of the larvae is supposed to be the layer from the surface to 40m. in depth. The vertical distribution of the adult fish is chiefly in the layer, 40-70m. in depth, during the period from late autumn to early spring. It becomes shallower in late spring and summer, the depth being about 20-40m. 8. The ranges of water temperature and salinity in the sea where the adult fish schools are distributed are 17.0-26.0°C and 34.0~34.8%0. respectively. 9. The spawning takes place during the period from the end of January to June in the southern part of the East China Sea and the sea areas around the Osumi Islands, off Ashizuri Cape and around the Izu Islands. These spawning grounds are sea areas where a comparatively rapid current is running towards a land shelf. 10. The ranges of the optimum water temperatures and salinities for the spawning are assumed to be 17-23°C and 34.0-34.8 0/00, respectively. 11. The primordial germ cells seem to migrate to the gonad by amoeboid movement from other places than the gonad. 12. The early indifferent gonad is very slender and suspended with a mesogonium, in the coelom. It is composed of peritoneal epithelium, stroma cells and primordial germ cells. 13. The formation of the gonocoel begins as a longitudinal depression on the surface of the gonad, facing the mesentery. This depression takes place in the gonad of the fish, about 60mm. in fork length, prior to the sex differentiation. 14. The sex differentiation occurs directly without a phase of a juvenile hermaphrodite. 15. The gonad in which the gonocoel is greatly enlarged becomes an ovary, while that in which the gonocoel is left narrow becomes a testis. 16. In the early ovary the layer containing oogonia is surrounded with stroma cells. The surface of the ovary is covered with cuboidal epithelium. 17. In the ovary of the fish, 100-130mm. in fork length, the wall of the ovocoel forms small protuberances, which become the lobes of the ovary. The oocytes are situated in these lobes. The yolk formation begins in the oocytes, 15.....,20.a in diameter, 18. The maturing process of eggs is clasified into the following 7 stages; the chromatin nucleolus, the peripheral nucleolus, the yolk vesicle, the early yolk globule, the late yolk globule, the migrating nucleus and the matured stage. Ovarian eggs at the migrating nucleus stage and the matured stage are observed in the fish, more than 300mm. in fork length. 19. The surface of the early testis is covered with peritoneal epithelium. The interior is filled up with the multiplied stroma cells and the spermatogonia scattered among them. In the testis of a somewhat later stage, a lot of branches are stretched out of the testocoel. Some of the spermatogonia are arranged directly beneath the peritoneal epithelium and the others are buried deep in the testis. The testis lacks a layer of stroma cells under the peritoneal epithelium. 20. In the testis of young male fish the spermatogonia increase in number and surround the small branches of testocoel; they form seminiferous tubules. The testocoel and its large branches become the rete apparatus constructed of collecting ducts. The maturation division appears in the testes of the fish more than 280mm. in fork length. 21. The sex ratio of the young fish is approximately 1 : 1. The ratio between the gonad length and the fork length shows an exponential increase. The gonads of adult fish are enlarged about 9-13 % of the original length during the spawning season. 22. During the months from July to November the oocytes in the ovaries of adult female :fish are at the chromatin nucleolus stage and the peripheral nucleolus stage. During the same season there are only spermatogonia in the testes of adult male fish. The gonads of adult fish begin to increase in size in December and become the largest in March and April. The increase in size of the ovary is chiefly due to the enlargement of ova on account of yolk deposition. The increase in size of the testis is due to accumulation of spermatozoa. 23. A few oogonia can be seen m the ovanes of adult female fish during and immediately after spawning. Numerous spermatogonia appear along the inner walls of the seminiferous tubules late in the spawning season.
Resume 1) The egg of Squilla oratoria DE HAAN is centrolecithal and undergoes partial cleavages resulting in rudimentary primary yolk pyramids. 2) The germinal disk is first represented by a pair of optic lobes and a ventral plate, which are afterward connected by paired, lateral ectoderm thickenings to form a V-shape. The V is then transformed into an O by the appearance of a transverse band between the optic lobes of both sides. 3) A small blastopore is formed. Of the mesendoderm cells derived from the blastopore by cell immigrations, those attached to the lower surface of the lateral ectoderm thickenings are differentiated into a U-shaped, naupliar mesoderm band. This inesoderm band joins the preante:mulary mesoderm derived from the optic lobe, and grows into a complete ring conforming to the shape of the germinal disk. 4) The extra-blastoporic immigrants consist of a preantennulary mesoderm, mesodermal yolk cells and a part of the naupliar mesoderm. The greater part of the preantennulary mesoderm cells disintegrate sooner or later, without forming any distinct structure. The mesodermal yolk cells also degenerate after taking part in the dissolution of the deutoplasm. A discussion as regards the mutual relationship between these elements, with the conclusion that the formation of the preantennulary mesoderm represents the initial step of the extra-blastoporic cell sinking from the whole egg surface, is included. 5) The endodermal elements consist of a compact cell mass differentiated from the posterior part of the mesendoderm layer and the endodermal yolk cells immigrated from the blastopore. The yolk cells, after migrating through the most peripheral part of the yolk, scatter all over its surface. The endoderm plate is nothing but a mass of yolk cells. which remain without scattering. 6) Eight mesoteloblasts derived from the blastoporic lip are attached to the inner surface of the thoracico-abdominal process, making four groups. The ectoteloblasts are differentiated from the ordinary blastoderm cells in a later stage than the mesoteloblasts. In the final condition they consist of 21 cells forming a complete ring around the thoracico-abdominal process. 7) Both the ectoderm and the mesoderm are derived from the teloblasts in all of the post-naupliar segments.· The dorsal ectoderm, however, is non-teloblastic in only a few anterior segments. Differentiation of segments proceeds from the front toward the back. 8) The telson mesoderm is formed by the cells sunk from the telson ectoderm which is derived from the peri-blastoporic ectoderm . 9) The anus is the remnant of the blastopore. In accordance with the change of the caudal furca, the anus is displaced from the dorsal side of the telson to the ventral border between this and the last abdominal segment. 10) There is a distinct nauplius stage. Of the meta-naupliar segments, those from the m:txillula to the second maxilliped are laid on the germinal disk, the following segments together forming a thoracico-abdominal process. Two maxiliiped segments, however, are later separated from the cephalon with the development of the carapace fold, and join the trunk segments. Externally, six abdominal segments are formed. 11) The ganglionic cells are proliferated from the neuroblasts occupying the most superficial part of the centra1 nervous system. The giant ganglionic cells arise from the ordinary ganglionic cells and not directly from neuroblasts. The development of the cerebrum is described. The tritocerebra of both sides are conne~ted by a transverse nerve-fibre bundle behind the stomodaeum. The ganglia of the segments from the mandible to the second maxilliped first exhibit a typical ladder-like shape. Of these ganglia, the anterior three constitute a sub-resophageal ganglion by more or less complete fusion, while the posterior two are transferred from the cephalon to the thoracico-abdomimil process with the constriction of the segments. The inter-ganglionic cell groups take part in the constriction of the consecutive segments. The seventh abdominal ganglion is clearly indicated by the presence of such a cell group as well as of a pair of nerve fibre masses. 12) The development of the compound eye is traced. The ganglion opticum is derived from the ectoderm of the optic lobe lateral to the protocerebrum; it is not an outgrowth of the cerebrum. 13) The ganglion visceralum is differentiated from the anterior wall of the stomodaeum. 14) A median dorsal organ is formed. In close connection with the activity of this organ, the embryo undergoes one ecdysis. 15) The mid-gut epithelium is formed by the gradual expansion of the anterior and posterior endoderm plates over the yolk sac. These plates, however, extend only on the ventral side of the yolk sac before hatching. The posterior plate is produced by the concentration of the scattered yolk cells toward the periphery of the. plate differentiated from the mesendoderm, while the anterior plate is formed by yolk cells alone. 16) The greater part of the intestine develops from the outgrowth of the posterior endoderm epithelium, the proctodaeum occupying only the rectum. 17) The posterior liver lobes are produced from the posterior endoderm plate as a pair of blind tubes and extend as far backward as the telson. The anterior liver lobes and the lateral mid-gut cceca are rather incompletely developed, being ~eparated by shallow superficial grooves of the yolk sac. These two pairs of diverticula are only partially covered by the endoderm epithelium, and develop into more or less distinct coeca during larval life. They later seem to be completely absorbed again by the mid-gut. 18) The product of each division of the mesoteloblast is equivalent to one mesodermal-segment. The mesoderm of the seventh abdominal segment is derived from the posteriorly situated daughter cell produced by the last division of the teloblast. In' accordance with the grouping of teloblasts, the trunk mesoderm is separated into two ventral and two dorsal bands. Each band is further separated into segmentally arranged blocks, the somites. The ccelom develops in no stage and in no segment. 19) The dorsal mesoderm gives rise to the extensor and the oblique muscles of the trunk, the anterior and posterior limb muscles, as well as to the mesodermal inclusion of the limb. The -ventral mesoderm grows into the flexor. The connective tissue investing the intestine -and the liver lobes are principally constructed from the dorsal mesoderm. The germ cell does not appear until hatching. A brief account is also given of the fate of the naupliar mesoderm. 20) The heart wall and the pericardial floor are morphologically one unit. They arise from the dorsal mesoderm as a pair of membranes stretching between it and the intestine. The dilated and elongated parts of the heart are formed by the subsequent union of these paired rudiments. 21) The anterior dorsal vessel has a two-fold origin; it is formed by the fusion of an anterior rudiment extending backward from the rostrum and a posterior one developing as a tubular outgrowth of the heart. The former is derived from the rearrangement of mesenchymatous cells which migrated from the anterior end of the naupliar mesoderm. 22) By the time of hatching, two pairs of lateral vessels are formed as hollow linear thickenings of the pericardial floor in front and behind the dilated part of the heart. 23) The antennal gland remains rudimentary without acquiring any intercellular lumen. The maxillar gland is not laid until hatching. The labral and anal glands are derived from the peristomodaeal and the telson mesoderm respectively. 23) Comparisons are made bewteen Squilla and other orders of Malacostraca as regards the salient points of the embryonic development. These have led to the conclusion that the Stomatopoda are most closely related in their embryonic development to Nebaliacea, and further that Stomatopoda represent a rather primitive group separated from the main stem of Malacostraca very early, only next in order to Nebaliacea.
The purpose of the present paper is to describe the thoracic cirripeds found in the waters around the Seto Marine Biological Laboratory. The material dealt with in this paper was collected almost entirely by myself during the period extending from the summer of 1930 up to the present time, except a few species obtained from the Soyo-maru Expedition undertaken by the Imperial Fisheries Experimental Station during the years 1926-1930. Descriptions of the latter have already been given (HIRO, 1933a). The present material consists, with few exceptions, of specimens from the littoral zone and shallow water; none of the specimens are from deep water. However, I have paid special attention to the commensal forms from the ecological and faunistic standpoint, and have thus been able to enumerate a comparatively large number of species in such a restricted area as this district.