Two new species and a new distributional record of Alterosa (Trichoptera: Philopotamidae) from southeastern Brazil

Christina Novais,Jorge Luiz Nessimian,Leandro Lourenço Dumas

doi:10.11606/1807-0205/2019.59.52

Christina Novais, Jorge Luiz Nessimian + Show 1 more

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https://doi.org/10.11606/1807-0205/2019.59.52

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Abstract

The genus Alterosa Blahnik (2005), with 39 extant species, is endemic to Atlantic Forest areas of southern and southeastern Brazil. Herein, we describe and illustrate two new species from Rio de Janeiro state, southeastern Brazil: Alterosa cornuta sp. nov., easily diagnosed by the horn-like intermediate appendages crossing each other, and A. araras sp. nov., recognized mainly by the extremely developed basodorsal protuberance on tergum X and by the rod-like, mesally curved preanal appendages, with at least 2 stout spine-like setae positioned at mid length and with the apex cupped. Additionally, a new distributional record for Espírito Santo state, southeastern Brazil, is provided for Alterosa falcata Blahnik (2005).

Highlights

Philopotamidae is a worldwide caddisfly family with 22 extant genera and approximately 1,300 described species distributed into three subfamilies: Rossodinae, with 16 species in the genus Rossodes Özdikmen & Darilmaz (2008); the cosmopolitan Chimarrinae, with about 800 extant species distributed into three genera; and Philopotaminae, with more than 400 described species within 18 genera (Blahnik, 2005; Özdikmen & Darilmaz, 2008; Gibon, 2013; Holzenthal et al, 2018)
Five genera are recorded in Neotropical region: Wormaldia McLachlan (1865), with about 200 species in all biogeographic regions except Australasian (50 of them occur in Neotropics); Hydrobiosella Tillyard (1924), with about 30 species in Australasia and one species from the Andes of Ecuador; the monotypic Aymaradella Holzenthal, Blahnik & Ríos-Touma (2018), restricted to the Bolivian Andes; Sortosa Navás (1918), with 20 extant species restricted to southern Chile and adjacent regions of Argentina; and Alterosa Blahnik (2005), endemic to Brazil with 39 described species (Blahnik, 2005; Muñoz-Quesada & Holzenthal, 2015; Holzenthal & Calor, 2017; Holzenthal et al, 2018)
Two new species of Alterosa are described and illustrated from male specimens collected in Rio de Janeiro state, southeastern Brazil

Summary

Introduction

Philopotamidae is a worldwide caddisfly family with 22 extant genera and approximately 1,300 described species distributed into three subfamilies: Rossodinae, with 16 species in the genus Rossodes Özdikmen & Darilmaz (2008); the cosmopolitan Chimarrinae, with about 800 extant species distributed into three genera; and Philopotaminae, with more than 400 described species within 18 genera (Blahnik, 2005; Özdikmen & Darilmaz, 2008; Gibon, 2013; Holzenthal et al, 2018). Two new species of Alterosa are described and illustrated from male specimens collected in Rio de Janeiro state, southeastern Brazil.

Results

Conclusion