Alterosa bocainae, 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 : 15-17

publication ID 10.11646/zootaxa.991.1.1


persistent identifier

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scientific name

Alterosa bocainae

new species

Alterosa bocainae , new species

Figs. 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 4 , 6A–D View FIGURE 6

This species is similar to A. fimbriata , but differs in that its intermediate appendage has a longer basal stalk and less of an apical expansion, and also in having tergum X lacking longitudinal rows of spines.

Adult. Color (in alcohol) brown; legs, palps, and antennae distinctly pale, wing pattern not discernable, but costal margin with some paler areas. Male forewing 7–7.8 mm.; female 6.6–6.9 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 weakly rounded, subtruncate; posteroventral margin greatly produced, forming broadly rounded expansion; tergum IX greatly reduced, membranous or fused to base of tergum X. Tergum X tapered from base, basolaterally with small rounded sensillate projection; apex sensillate, subacute as viewed dorsally, rounded and slightly enlarged in lateral view. Intermediate appendage heavily sclerotized, short, subequal in length to preanal appendage, posteromesally curved from base and greatly enlarged apically; apex rounded, with brush of coarse setae, extending along apex and dorsomesal margin, also with numerous fine microsetae. Preanal appendage narrow, constricted basally, moderately elongate, not greatly modified, with scant setae and numerous minute seta­like spines; apex abruptly narrowed, forming subacuminate projection, with distinct terminal seta. Inferior appendages elongate, linear, flattened on mesal surface; 1st article, in lateral view, narrow, more than 2x as long as wide, tapering apically; 2nd article shorter than 1st, nearly uniform in width, slightly narrower at base than apex of 1st article; apex rounded, with small pad of short, stiff apicomesal setae. Phallobase tubular, elongate narrow, strongly bent near base; endotheca with clusters of small spines.

Holotype male: BRAZIL: São Paulo: Lajeado, Serra da Bocaina, Cachoeira do Lajeado , 22°43.208'S, 44°37.782'W, el 1590 m, 4.iii.2002, Paprocki & Muniz, ( UMSP000100627 View Materials ) ( MZUSP). GoogleMaps

Paratypes: BRAZIL: São Paulo: — 4 males, 2 females, same locality data as holotype ( UMSP) ; — 17 males, 7 females, Parque Nacional da Serra da Bocaina , small trib. on main park road, 22°46.585'S, 44°36.307'W, el 1560 m, 2–3.iii.2002, Holzenthal, Blahnik, Paprocki, Prather, ( MZUSP) ( UMSP) GoogleMaps ( NMNH) GoogleMaps .

Etymology. This species is named bocainae for Parque Nacional da Serra da Bocaina, the beautiful park where the type specimens were collected.


Museu de Zoologia da Universidade de Sao Paulo


University of Minnesota Insect Collection


Smithsonian Institution, National Museum of Natural History