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

publication ID 10.11646/zootaxa.991.1.1


persistent identifier

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scientific name

Alterosa tripuiensis

new species

Alterosa tripuiensis , new species

Fig. 25A–D View FIGURE 25

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 View Materials ) ( MZUSP). GoogleMaps

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) GoogleMaps , ( UMSP) GoogleMaps .

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


Museu de Zoologia da Universidade de Sao Paulo


Smithsonian Institution, National Museum of Natural History


University of Minnesota Insect Collection