Alterosa morato, 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 morato , new species

Figs. 9 A–D

Alterosa morato sp. nov. belongs to the A. falcata Group, as defined by Blahnik (2005), by sharing the arched intermediate appendages, although it lacks large phallic spines. It is closely related to A. falcata Blahnik 2005 and A. jordaensis Blahnik 2005 , agreeing in the general structure of intermediate appendages, and also tergum X. However, in the new species intermediate appendages have a small projection basoventrally, absent in both species described by Blahnik (2005). Additionally, the presence of spiny cuticle mesally on tergum X and the lack of endothecal spines in the phallus are also useful diagnostic characters.

Adult. Color (in alcohol) brown; legs, palps, and antennae pale brown, wing pattern not discernible. Male forewings each 5.8–6.7 mm (n=2).

Male genitalia. Tergum VIII with posteromesal margin moderately emarginate, emargination V-shaped and extending no more than halfway to anterior margin. Sternum IX with anterolateral margins broadly rounded; posteroventral margin moderately produced, extending sinuously from dorsum ( Fig. 9 A). Tergum IX greatly reduced, membranous or fused to base of tergum X ( Fig. 9 B). Tergum X subtriangular in lateral and dorsal views, tapered from base; cuticle mesally rough, covered by numerous spines; apex sensillate, rounded ( Figs. 9 A, 9B). Intermediate appendages heavily sclerotized, elongate, extending past preanal appendages, arched, sickle-like; basally with small ventral projection as viewed laterally; apex attenuated, acute, curved downward ( Figs. 9 A, 9B). Preanal appendages moderately enlarged, club-like, covered by stiff, small setae, rounded at apex; apically with long subacuminate projection, without apical setae ( Figs. 9 A, 9B). Inferior appendages robust, setose; 1st article, in lateral view, approximately 1.5 times as long as wide, tapering apically; 2nd article subequal in length to 1st article, relatively wide, enlarged, rounded apically, with prominent pad of short, stiff apicomesal setae ( Figs. 9 A, 9C). Phallobase tubular, weakly curved ventrad; endotheca without prominent spines or phallotremal sclerites ( Fig. 9 D). Holotype male: BRAZIL: Paraná: Guaraqueçaba, Reserva Natural de Salto Morato , tributary of Córrego Morato , 25°09’53.9”S, 48°17’54.3”W, el. 55 m, 25.i.2011, JL Nessimian & RB Braga leg. (DZRJ 3489). Paratype: BRAZIL: Paraná: Guaraqueçaba, Reserva Natural de Salto Morato , Córrego Morato , 25°09’48.3”S, 48°17’54.7”W, el 53 m, 25.i.2011, JL Nessimian & LL Dumas leg., 1 male (DZRJ 3490). Distribution: Brazil (Paraná state).

Etymology: The epithet of the specific name, morato , refers to Reserva Natural de Salto Morato , a beautiful Atlantic Forest site where the type specimens were collected.

Figures

FIGURE 9. Alterosa morato, new species, male genitalia. 9 A, left lateral view; 9 B, dorsal view; 9 C, left inferior appendage, dorsal view; 9 D, phallic apparatus, left lateral view.