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Eight new species of Itauara Müller, 1888 are described based on specimens collected in southeastern Brazil: I. bispinata sp. nov., I. caparao sp. nov., I. cipoensis sp. nov., I. cristata sp. nov., I. holzenthali sp. nov., I. mangaratiba sp. nov., I. robertsonae sp. nov., and I. rupicola sp. nov. In addition, we provided an updated distributional list of species of Itauara, with new records of I. jamesii Robertson & Holzenthal, 2011 and I. lucinda Robertson & Holzenthal, 2011 for Espírito Santo State (Brazil), I. plaumanni (Flint, 1974) for Paraná State (Brazil), and I. tusci Robertson & Holzenthal, 2011 for Minas Gerais State (Brazil). We performed an equal weighted parsimony analysis adding the new species to the dataset provided by Robertson & Holzenthal (2013), with modification of the interpretation of some morphological characters. The genus was recovered as monophyletic, but overall statistic support for clades was weak. Itauara is restricted to South America and has a disjunct distribution, with some species occurring in northern South America and others in southeastern South America. Probably, the diversification of Itauara in South America is related to the connections between the Amazon Forest and the Atlantic Forest through historical events at different times.
Here I describe a new genus, Iviephengus gen. nov., based on a single species, Iviephengus ferreirai gen. et sp. nov., from Peru. This new genus is characterized by the following combination of characters: interantennal distance close to 3 × the antennal socket length; antenna 12-segmented, IV to XI each with two long symmetrical compressed and apically slightly enlarged branches; labrum fused to frontoclypeus; mandibles short, obliquely crossed, each with a notch on the external margin to fit the other mandible and without extra teeth; maxillary palpi 4-segmented, last segment digitiform; labial palpi 2-segmented; posterior tentorial pit consisting of a single small fossa; wing with radial cell closed and transverse, vein r4 interrupted, r3 absent; first tarsomere of pro- and mesotarsus with a ventral comb covering the posterior half of the tarsomere; claws simple, without any teeth; aedeagus with paramere symmetrical, apex unevenly round, toothed inward, with short and sparse bristles. I provide a key to Mastinocerinae genera with 12-segmented antennae and the first pro- and mesotarsomere with ventral combs. I also provide illustrations for the diagnostic features for this new genus. Finally, I discuss the presence and function of some modifications in the mandible and the sternite VIII in Phengodidae and other Coleopteran families.
The long-horned caddisfly genus Triplectides Kolenati, 1859 is the most species-rich within Triplectidinae, comprising about 90 species. Eight species have been recorded so far in Brazil, mainly distributed in the Southeast Region, and only one species has been recorded from the North Region. In this paper a new species of Triplectides is described and illustrated, Triplectides nessimiani Desidério & Pes sp. nov., based on adult males from Serra do Aracá, Amazonas, Brazil. We also provide the first record for Brazil of T. neblinus Holzenthal, 1988 and T. nevadus Holzenthal, 1988. In addition, an updated identification key to Triplectides species with occurrence in Brazil is presented.
A new microscopic cnidarian is described, infecting five of thirty (16.6%) specimens of Corydoras schwartzi caught in the Purus River, State of Amazonas, Brazil. Histological analysis showed that cyst development occurred in the serosa layer of the intestine. Mature myxospores are ovoid in body shape in frontal view, 22.4 ± 0.3 μm in total length and 16.3 ± 0.1 μm in width. Internally, two aubergine-shaped, elongate symmetrical polar capsules occupy more than half the length of the spore, 14.3 ± 0.2 μm in length and 6.5 ± 0.1 μm in width. Ultrastructural analysis provided evidence of five polar filament coils inside the polar capsule and binucleated sporoplasm containing a moderate number of sporoplasmosomes. The valvogenic cells abutting each other form a sutural ridge and frequently a thin layer of homogeneous material separates the cells. The outer surface of the myxospore valves is smooth, with no evidence of formation of ridges in the valves. Immature myxospores in various stages of development were observed. This study is the first report of a myxosporean parasitizing C. schwartzi and the first report of a myxosporean infection in the intestine of an ornamental fish from South America.
Telegeusinae is a small subfamily of Elateroid beetles presently attached to the Omethidae family. Pseudotelegeusis Wittmer, 1976 is composed of three species, two occurring in northern South America and one in Mexico. Here we describe the fourth species for the genus, Pseudotelegeusis meloi sp. nov., collected in a Malaise sample from the region of Madre de Dios, Peru. The new species is diagnosed mainly by the antennae serrate from antennomeres III to X, eyes occupying half of head width in lateral view and vertex occupying 3/5 of head in dorsal view. This new species is close to the other two South American species, P. howdeni Wittmer, 1976 and P. oculatus Wittmer, 1976, according to the serrate antennae and number of ventrites. The three South American species differ from the Mexican species, P. jiliotupaensis Zaragoza-Caballero, 2008, by the different antennae and the number of ventrites, which indicates that the Mexican species should possibly be classified in a different genus. The main morphological characters, including maxillar palpi, tentorial pits and male genitalia, are illustrated, and an updated key to the species of Pseudotelegeusis is given, as well as distribution maps.
A new genus is proposed within the family Geophilidae: Hyphydrophilus n. gen., for H. adisi n.sp. Four additional new species are described, i.e. the ballophilids ltyphilus crabilli n.sp. and Taeniolinllm arborum n.sp. and the schendylids Pecfiniunguis ascendens n.sp. and Schendyluflls amazonicl/s n.sp. The geophilid species Ribautia centralis (SILVESTRI, 1907) is redescribed, after material from Brazil compared with the holotype. The ballophilid Thalthybil/s perrieri BROLEMANN, 1909 is transferred to the genus ltyphi/us COOK, 1889 and a lectotype is designated here for it.