Alterosa bandeira, 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) : -

Alterosa bandeira , new species

Figs. 2 A–D

Alterosa bandeira sp. nov. belongs to the A. marinonii Group, as defined by Blahnik (2005), by sharing the greatly modified and enlarged preanal appendages, which are armed with stout, modified setae. The new species is closely related to Alterosa sanctateresae Blahnik 2005 , differing from the latter mainly by the shape of the preanal appendages. While A. sanctateresae has preanal appendages possessing a flange-like process with a cluster of stalked spine-like setae, these appendages are not projected in the new species, having only a basal enlargement. Additionally, in A. bandeira sp. nov. the preanal appendages are club-shaped and more elongate in comparison with those of A. sanctateresae .

Adult. Color (in alcohol) brown; legs, palps, and antennae pale brown, forewing pattern not discernible. Male forewings each 6.7–7.0 mm (n=2).

Male genitalia. Tergum VIII with posteromesal margin not or scarcely emarginate. Sternum IX with anterolateral margins broadly rounded; posteroventral margin greatly produced, extending sinuously from dorsum ( Fig. 2 A). Tergum IX reduced, forming mesal subtriangular plate over base of tergum X, partially fused to tergum X ( Fig. 2 B). Tergum X in dorsal view narrow, subtriangular; basolateral margins weakly protruding, subparallel in basal half, mesally tapering apically; apex sensillate, rounded as viewed dorsally, rounded and moderately enlarged in lateral view ( Figs. 2 A, 2B). Intermediate appendages heavily sclerotized, elongate, not surpassing preanal appendages, branched basally, both branches rod-like; mesal branch half as long as lateral branch, bent posterad, with acuminate apex; lateral branch with apex subacute and with brush of short, stiff setae ( Figs. 2 A, 2B). Preanal appendages greatly enlarged, each much wider at base than apex, elongate, covered by small setae; basally with huge flange-like projection with cluster of prominent, stalked, long, spine-like setae; apex rounded, with stiff, spine-like setae apically, subacute in dorsal view ( Figs. 2 A, 2B). Inferior appendages robust, setose; each with 1st article, in lateral view, wide, approximately 1.5 times as long as wide; 2nd article subequal in length to 1st article, relatively wide, base nearly as wide as apex of 1st article, apex rounded, not enlarged, with prominent pad of short, stiff apicomesal setae ( Figs. 2 A, 2C). Phallobase tubular, relatively short, slightly curved; endotheca with paired tracts of numerous short spines, spines slightly longer apically; phallotremal sclerites indistinct ( Fig. 2 D).

Holotype male: BRAZIL: Minas Gerais: Alto Caparaó, Parque Nacional do Caparaó, Rio Caparaó, Vale Verde, 20°25’11.6”S, 41°50’44.8”W, el. 1306 m, 07.x.2010, JL Nessimian & IC Gonçalves leg. (DZRJ 3479).

Paratypes: BRAZIL: Espírito Santo: Iúna, Serra do Caparaó, Rio Claro, Cachoeira do Rogério, 20°22’05.5”S, 41°49’51.5”W, el. 1071 m, 06.x.2010, LL Dumas & JL Nessimian leg., 1 male (DZRJ 3480); same locality, 24.iii.2012, GA Jardim & JL Nessimian leg., 10 males (DZRJ 3503); same locality, 24.iii.2012, GA Jardim & ALH Oliveira leg., 3 males, 2 females (DZRJ 3504); Minas Gerais: Alto Caparaó, Parque Nacional do Caparaó, Vale Verde, tributary of Rio Caparaó, 20°25’09.5”S, 41°50’47.4”W, el. 1364 m, 24.iii.2012, GA Jardim & JL Nessimian leg., 1 male (DZRJ 3505).

Distribution: Brazil (Espírito Santo and Minas Gerais states).

Etymology: The epithet of the specific name, bandeira , refers to Pico da Bandeira , the highest peak of Serra do Caparaó mountain range and the third highest of Brazil, with 2892 m a.s.l.

Figures

FIGURE 2. Alterosa bandeira, new species, male genitalia. 2 A, left lateral view; 2 B, dorsal view; 2 C, left inferior appendage, dorsal view; 2 D, phallic apparatus, left lateral view.