Alterosa tripuiensis, Blahnik Table Of Contents, 2005

Blahnik Table Of Contents, Roger J., 2005, Alterosa, a new caddisfly genus from Brazil (Trichoptera: Philopotamidae), Zootaxa 991 (1), pp. 1-60 : 50-51

Alterosa tripuiensis , new species

Fig. 25A–D

This species is unlike any other species of Alterosa and easily diagnosed by the structure of the intermediate appendages, which are unique in forming a compact cluster of elongate spines.

Adult. Color overall, dark brown; legs, palps, and antennae slightly paler, wings irregularly mottled with small light brown spots. Male forewing 6–6.9 mm.; female 7.1–7.5 mm.

Male genitalia. Tergum VIII with posteromesal margin moderately emarginate, emargination V­shaped and extending no more than halfway to anterior margin. Sternum IX with anterolateral margin forming a rounded projection in dorsal half; posteroventral margin greatly produced, forming broadly rounded expansion; tergum IX reduced, forming a mesal projection over base of tergum X, mesal projection narrow, extending hood­like, with scabrous dorsal surface texture, but without spines. Tergum X with rounded lateral margins; apex sensillate, rounded as viewed dorsally, not or scarcely enlarged in lateral view; tergum basolaterally with minute spines. Intermediate appendage heavily sclerotized, comprised of short mesal projection with 2 or 3 elongate spines and basolateral cluster of elongate spines, decreasing in size ventrally. Preanal appendage narrow, constricted basally, moderately elongate, not greatly modified, with scant setae and numerous minute seta­like spines; apex abruptly narrowed, forming subacuminate projection, without apical seta. Inferior appendages robust; 1st article, in lateral view, about one and a half times longer than wide, tapering apically; 2nd article subequal in length to 1st article, relatively wide, enlarged apically; apex rounded, with prominent pad of short, stiff apicomesal setae. Phallobase relative short and evenly tubular, weakly curved at midlength; endotheca with about 5 or 6 large sclerotized spines.

Holotype male: BRAZIL: Minas Gerais: Estação Ecológica do Tripuí, Córrego Tripuí , 20°23.364'S, 43°32.541'W, el 1070 m, 21.xi.1998, Paprocki, Braga, Amarante, ( UMSP000046796 ) ( MZUSP).

Paratype s: BRAZIL: Minas Gerais: — 1 male, same locality data as holotype ( NMNH) ; — 2 males, 2 females, Córrego da Serra de Ouro Fino, Vale do Tropeiro , 20°12.371'S, 43°38.581'W, el 1000 m, 8.x.2000, Paprocki, Salgado, Isaac, ( MZUSP) , ( UMSP) .

Etymology. This species is named tripuiensis after Estação Ecológica do Tripuí, the beautiful reserve where the holotype specimen was collected.

Figures

FIGURE 25. Alterosa tripuiensis, new species. Male genitalia: 25A—lateral view; 25B—dorsal view of segments IX and X; 25C—inferior appendage, dorsal view; 25D—phallic apparatus, lateral view.