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Martensina thailandica gen. et sp. nov., a freshwater ostracod species representing a new subfamily, Martensininae subfam. nov., in the family Cyprididae, is here described from a swamp in Maha Sarakham Province, Thailand. The new genus and species is mainly characterized by the 7-segmented antennula which has a Rome organ and remarkably long aesthetasc ya, the morphology of the sexually dimorphic antenna (A2), the markedly elongated A2 terminal segment, the short and thin α- and β-setae on the mandibular palp, the elongated terminal segment of the maxillula, the obviously 2-segmented male prehensile palp, the presence of d1 and d2 setae on the protopod of the second thoracopod (T2), the sexually dimorphic T2, the distinctive terminal segment of the third thoracopod bearing three long setae, the well-developed caudal ramus, the large hemipenis which has a complex internal structure, and the Zenker organ with funnel-shaped ends and numerous spiny whorls.
Benthic samples collected along the Brazilian central continental margin from Espírito Santo State to Rio de Janeiro State (19° S to 24° S) during the last 20 years and at depths of 50–2200 m yielded the description of six new species of Typhlotanais in the deep-sea (> 200 m): Typhlotanais andradeorum sp. nov., T. bolarticulus sp. nov., T. ischnochela sp. nov., T. longiseta sp. nov., T. priscilae sp. nov. and T. spinibasis sp. nov. Within these species, we found members of four Typhlotanais morpho-groups as ‘cornutus’ group, ‘greenwichensis’ group, ‘spinicauda’ and ‘trispinosus’ group. Typhlotanais ischnochela sp. nov. exhibited the greatest bathymetric range, occurring from the continental shelf until the lower slope (46–1898.7 m depth). The bathymetric distribution of the other five species of Typhlotanais herein described were restricted to the slope. Tables of diagnostic characters of the Typhlotanais morpho-groups and an identification key to the species of Typhlotanaidae found in Brazil are provided. This work brings the total number of Tanaidacea known for Brazilian coast to 64 species, and the family Typhlotanaidae from Brazil is now represented by 11 species in five known genera.
The nineteen species of Cybocephalidae (Coleoptera) occurring in North America and the West Indies (including Trinidad) are listed and keyed. Cybocephalus skelleyi new species and Cybocephalus edmondsoni new species are described, and Cybocephalus carrabeus T. R. Smith is found to be a new synonym of Cybocephalus geoffereysmithi T. R. Smith. Illustrations of morphological features, including detailed drawings of male genitalia, host records and distribution data, are provided.
ZooBank registration. urn:lsid:zoobank.org:pub:2425983D-0398-45D4-A728-3BF5991D07BE
Two new species of Psyllocarpus sect. Psyllocarpus, P. itakangapyra Sobrado, J.A.M.Carmo & R.M.Salas sp. nov. and P. vianae Sobrado, J.A.M.Carmo & R.M.Salas sp. nov., from the “campo rupestre” of the state of Minas Gerais, southeastern Brazil, are here described and illustrated. We provide comments on their distribution, habitat, and preliminary conservation status, and discuss their taxonomy. In addition, we analyse floral, fruit, and seed micromorphology, as well as pollen grains of the new species. We also provide an updated identification key to the species of P. sect. Psyllocarpus.
During a taxonomic study of the species of Croton sect. Adenophylli occurring in Brazil, approximately 140 collections usually identified as Croton echioides, C. rhamnifolius or C. rhamnifolioides caught our attention due to the distinct morphology of vegetative and reproductive organs. After the analysis of these collections, we concluded that they represent a new species, C. sertanejus Sodré & M.J.Silva sp. nov., which was also corroborated by an anatomical study of their leaves. This new species can be differentiated by pseudomonopodial branching, leaves with petioles up to 1.7 cm long, 4–6 subsessile nectary glands and indumentum of sessile trichomes on both surfaces. Detailed descriptions, including details of leaf anatomy, are provided for C. sertanejus sp. nov. and C. echioides, its closely related species. We also formalize the synonymization of C. kalkmannii under C. echioides and re-evaluate the typification of these names, in order to better clarify their taxonomic status.
The diversity of Palpigradi is not evenly distributed among its different branches. The widespread genus Eukoenenia includes 80% of the species, while the other genera are poorly known. Allokoenenia certainly is the most understudied genus because it is represented only by the African species Allokoenenia afra Silvestri, 1913. Its description is short and does not include many features depicted in modern taxonomy of Palpigradi. In this paper, we describe two troglobitic species of Allokoenenia, report the occurrence of a third species represented by an immature specimen from Brazilian caves, and provide brief notes on the morphology of A. afra. Allokoenenia canhembora sp. nov., A. stygia sp. nov., and Allokoenenia sp. differ from A. afra by several morphological features, including more elongated appendages and a greater number of blades on lateral organs. Thus, they are considered troglomorphic. These new species are vulnerable to extinction because they are endemic to a single or few caves directly impacted by mining activities and groundwater exploitation. This study represents the first step for the conservation of these species and their habitats, since Brazilian caves with rare troglobites cannot be irreversibly impacted. Also, it brings important contributions on the distribution and morphology of this enigmatic genus.
Examination of Coccinellidae material recently collected from Napo Province in Ecuador revealed 38 species of ladybird beetles, of which six are new: Chnoodes yanayacu sp. nov., Cyrea mcclarini sp. nov., Eupalea borowieci sp. nov., Exoplectra misahualli sp. nov., Hyperaspis rutai sp. nov., Toxotoma gonzalezi sp. nov. Seven species are recorded for the first time from Ecuador: Cyrea noticollis (Mulsant, 1850), Eupalea formosa Mulsant, 1850, Epilachna transverselineata (Mader, 1858), Psyllobora marshalli Crotch, 1874, Toxotoma fuscopilosa (Weise, 1902), Toxotoma taeniola (Gordon, 1975), Zenoria linteolata Mulsant, 1850. For three species: Epilachna obtusiforma Gordon, 1975, Hinda ecuadorica Gordon & Canepari, 2013 and Siola atra González, 2015, supplementary notes on the original descriptions are provided. New name combinations are proposed for six species, which are transferred to the genus Toxotoma Weise, 1900: Toxotoma aequatorialis (Gordon, 1975), Toxotoma chigata (Gordon, 1975), Toxotoma flavocirculus (González, 2015), Toxotoma fuscopilosa, Toxotoma hybridula (Gordon, 1975), Toxotoma taeniola. The occurrence of Scymnus interruptus (Goeze, 1777) in Ecuador is also confirmed.
Three new six-eyed species of the spider genus Caponina Simon, 1891 are described, photographed, diagnosed and illustrated: C. alejandroi sp. nov. (male and female) from the Boyacá Department, C. bochalema sp. nov. (male) from the Santander Department and C. huila sp. nov. (male) from the Huila Department. Also, a emended diagnosis for the genus, a distribution map and an identification key for all species of Caponina are provided.