Alterosa fimbriata, 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 : 25-26

publication ID 10.11646/zootaxa.991.1.1


persistent identifier

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scientific name

Alterosa fimbriata

new species

Alterosa fimbriata , new species

Fig. 11A–E View FIGURE 11

This species is most similar to A. bocainae , agreeing in having short, apically broadened intermediate appendages armed with coarse setae. It differs in having the intermediate appendages more broadly expanded apically, and in having a tergum X that possesses longitudinal rows of spines.

Adult. Color overall, dark brown; legs, palps, and antennae slightly paler, wings irregularly mottled with small light brown spots. Male forewing 7.8 mm.

Male genitalia. Tergum VIII with posteromesal margin deeply emarginate, emargination V­shaped and extending more than half way to anterior margin. Sternum IX with anterolateral margin broadly rounded; posteroventral margin greatly produced, forming broadly rounded expansion; tergum IX greatly reduced, membranous or fused to base of tergum X. Tergum X narrow, lateral margins subparallel; dorsally with mesally paired, longitudinal rows of short spines, converging apically; apex sensillate, subacute as viewed dorsally, apex enlarged and upturned in lateral view, forming a dorsally acute apex. Intermediate appendage heavily sclerotized, short, subequal in length to preanal appendage, lobe, as viewed laterally, with apicoventral margin greatly enlarged and rounded, lobe laterally compressed as viewed dorsally; apex subacute, with brush of coarse setae, setae extending ventrally along margin of apicoventral lobe. Preanal appendage narrow, constricted basally, moderately elongate, not greatly modified, with scant setae and numerous minute seta­like spines; apex rounded, with distinct terminal seta. Inferior appendages elongate, linear, flattened on mesal surface; 1st article, in lateral view, about 2x as long as wide, tapering apically; 2nd article shorter than 1st, nearly uniform in width, narrower at base than apex of 1st article; apex rounded, with small pad of short, stiff apicomesal setae. Phallobase tubular, narrow, moderately elongate, sinuously curved from base; endotheca with numerous fine needle­like spines.

Holotype male: BRAZIL: Rio de Janeiro: Parque Nacional da Serra dos Órgãos, Rio Paquequer , 22°26.992'S, 42°59.899'W, el 1000 m, 26.ii.2002, Holzenthal, Blahnik, Paprocki, Prather, ( UMSP000070780 View Materials ) ( MZUSP). GoogleMaps

Etymology. This species is named fimbriata, Latin for fringed, and referring to the apically widened intermediate appendages which are densely fringed with short spines.


Museu de Zoologia da Universidade de Sao Paulo