Alterosa marinonii (Almeida & Duarte) 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 : 39-40

Alterosa marinonii (Almeida & Duarte) , new combination

Fig. 19A–D

Dolophilodes (Sortosa) marinonii Almeida & Duarte 2003: 967 .

This species is similar to Alterosa escova , A. fluminensis , A. flinti , and A. sanctaeteresae , all of which have similarly developed inferior appendages and highly modified and enlarged preanal appendages armed with spine­like setae. From A. flinti and A. sanctaeteresae it differs in lacking elongate, apically setose lateral branches from the intermediate appendages. From A. escova and A. fluminensis it differs in the armature of the preanal appendages, which in A. marinonii are unique in being studded with very short, stout setae.

Adult. Color in alcohol, brown. Male forewing 5 mm.

Male genitalia. Tergum VIII with posteromesal margin not or scarcely emarginate. Sternum IX with anterolateral margin forming rounded projection in ventral half; posteroventral margin greatly produced, extending sinuously from dorsum; tergum IX reduced, forming a mesal projection over base of tergum X, projection broadly rounded and weakly developed. Tergum X tapered from base; apex sensillate, subacute as viewed dorsally, not or scarcely enlarged in lateral view. Intermediate appendage heavily sclerotized, shorter than preanal appendage, more or less spine­like and weakly scabrous; apex acute. Preanal appendage greatly enlarged, broad basally, elongate, with numerous very short, stout, spine­like setae located apically and along ventral margin. Inferior appendages robust; 1st article, in lateral view, short, nearly as wide as long, bulging mesally; 2nd article longer than 1st article, relatively wide and uniform in width, about as wide basally as apex of 1st article; apex rounded, with prominent pad of short, stiff apicomesal setae. Phallobase tubular, short, curved near middle; endotheca basally with about 8 fine needle­like spines, apically with numerous short tack­like spines.

Material examined: BRAZIL: Paraná: — 1 male, Rio Marumbi, Marumbi , el 1600 ft., 15–16.ii.1969, W.L. & J.G. Peters, ( NMNH) .

Figures

FIGURE 19. Alterosa marinonii (Almeida and Duarte). Male genitalia: 19A—lateral view; 19B—dorsal view of segments IX and X; 19C—inferior appendage, dorsal view; 19D—phallic apparatus, lateral view.