Alterosa capixaba, Dumas, Leandro Lourenço & Nessimian, Jorge Luiz, 2013

Dumas, Leandro Lourenço & Nessimian, Jorge Luiz, 2013, New species of the caddisfly genus Alterosa Blahnik 2005 (Trichoptera: Philopotamidae: Philopotaminae) from Brazil, Zootaxa 3609 (1) : -

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Alterosa capixaba

new species

Alterosa capixaba , new species

Figs. 5 View FIGURE 5 A–D

Alterosa capixaba sp. nov. possibly belongs to A. marinonii Group, as defined by Blahnik (2005). As the other members of A. marinonii Group, the new species shares the greatly modified preanal appendages, which are armed with stout, modified setae. However, some characters are inconstant among the species of A. marinonii Group, like the general structure of segment IX and the shorter 2 nd article of each inferior appendages. So, the placement of the new species within the A. marinonii Group is merely speculative. Additionally, A. capixaba sp. nov. also resembles A. truncata Blahnik 2005 and A. shadrackorum Blahnik 2005 (although they do not belong to A. marinonii Group) in possessing 2 nd article of each inferior appendage broad and truncate. However, in the new species the apical setae of the 2 nd article of the inferior appendage are almost posteriorly oriented, rather than forming a mesal pad.

Adult. Color (in alcohol) brown; legs, palps, and antennae pale brown, wing pattern not discernible. Male forewings each 6.5–7.7 mm (n= 5); female forewings each 6.8 mm (n= 1).

Male genitalia. Tergum VIII with posteromesal margin scarcely or not emarginate. Sternum IX with anterolateral margin extending almost linearly from dorsum; posteroventral margin not produced, subtruncate ( Fig. 5 View FIGURE 5 A). Tergum IX greatly reduced, membranous or fused to base of tergum X ( Fig. 5 View FIGURE 5 B). Tergum X greatly narrowed, especially in dorsal view; basally with long, narrow incision, bearing paired lateral edges; mesally with small crestlike projection; tergum with large basolateral margins weakly protruding, apices acute and curved slightly posterad; apex sensillate, rounded as viewed dorsally, rounded and moderately enlarged in lateral view ( Figs. 5 View FIGURE 5 A, 5 B). Intermediate appendages heavily sclerotized, rod-like, moderately elongate, only half as long as preanal appendages, acute apically ( Figs. 5 View FIGURE 5 A, 5 B). Preanal appendages elongate, as long as tergum X, rod-like, not greatly modified; apex rounded, with short, stout spine-like setae ( Figs. 5 View FIGURE 5 A, 5 B). Inferior appendages robust, setose; each with 1 st article, in lateral view, approximately as long as wide; 2 nd article shorter than 1 st article, slightly narrow than 1 st article; apex truncate, with short, stiff apicomesal setae ( Figs. 5 View FIGURE 5 A, 5 C). Phallobase tubular, short, weakly curved at base; endotheca without evident spines or phallotremal sclerites ( Fig. 5 View FIGURE 5 D).

Holotype male: BRAZIL: Espírito Santo: Santa Teresa, Estação Biológica de Santa Lúcia, Córrego Bonito, above Cachoeira Heloísa Torres, 19 ° 58 ’ 25.9 ”S, 40 ° 31 ’ 46.3 ”W, el. 685 m, 03.iv. 2011, LL Dumas & GA Jardim leg. (DZRJ 3483).

Paratypes: Same data as holotype, 4 males, 1 female (DZRJ 3484).

Distribution: Brazil (Espírito Santo state).

Etymology: The epithet of the specific name, capixaba , refers to Espírito Santo, the southeastern Brazilian state where the type specimens were collected. “Kapixaba”, from the Tupi language, means “field land,” in allusion to corn and mandioca fields cultivated by local Indian tribes, and also refers to the natives of Espírito Santo state.