Alterosa paprockii, 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: 42-44

publication ID 10.11646/zootaxa.991.1.1

persistent identifier

treatment provided by


scientific name

Alterosa paprockii

new species

Alterosa paprockii   , new species

Fig. 21A–D View FIGURE 21

This is a distinctive species, unlikely to be confused with any other species of Alterosa   . The highly modified, apically forked tergum VIII of the male and the dorsoventrally flat­ tened, plate­like appendages of tergum IX are unique within Alterosa   . However the modified tergum VIII has a somewhat analogous counterpart in the Chilean species, Sortosa duple   x (Schmid) and S. dupliplex (Flint)   .

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

Male genitalia. Tergum VIII with posteromesal margin deeply mesally excavate, with long paired rod­like projections, each forked at midlength and with flanking spines along inner margin of each branch. Sternum IX with anterolateral margin forming a rounded projection in dorsal half; 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, basally with weakly developed mesal crest, apex sensillate, subacute as viewed dorsally, rounded and slightly enlarged in lateral view. Intermediate appendages appearing rod­like, each extending nearly length of tergum and terminating with distinct apical seta. Lateral margins of tergum IX heavily sclerotized, elongate, extending past preanal appendages, forming greatly enlarged, slightly scabrous, dorsoventrally flattened plates, extending nearly length of tergum X, apices acute. Preanal appendage narrow, constricted basally, elongate, with scant setae on lateral margin; apex acute, with apical seta not enlarged or modified. Inferior appendages elongate, linear, flattened on mesal surface; 1st article, in lateral view, about 2x as long as wide, tapering apically; 2nd article longer than 1st article, relatively narrow and uniform in width, scarcely narrower at base than apex of 1st article, distinctly flattened on mesal surface; apex rounded, with small pad of short, stiff apicomesal setae and additional scattered short setae on mesal surface. Phallobase tubular, narrow, moderately elongate, angularly flexed and abruptly narrowed from basal third; endotheca (internally) with tract of numerous small spines.

Holotype male: BRASIL: Minas Gerais: Cachoeira do Abacaxi, Vale do Tropeiro , 20°12.270'S, 43°38.163'W, el 1120 m, 30.ix.2002, Paprocki, Braga, Salgado, ( UMSP000091521 View Materials ) ( MZUSP). GoogleMaps  

Etymology. I am pleased to name this species paprockii   for Henrique Paprocki, my good friend and fellow trichopterist, who collected the holotype specimen of this very unusual species.


Museu de Zoologia da Universidade de Sao Paulo