Alterosa jordaensis, 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: 37-39

publication ID 10.11646/zootaxa.991.1.1


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scientific name

Alterosa jordaensis

new species

Alterosa jordaensis   , new species

Fig. 18A–D View FIGURE 18

Alterosa jordaensis   is very similar to A. falcata   and, as discussed under that species, I am not altogether certain that the two are distinct species. At this stage in the description of the fauna, I felt it was better to use species names to describe the differences observed than to make assessments about species limits. While there are numerous minor differences between the two species, the most diagnostic difference is in the shape and structure of the intermediate appendages, which are less acute in A. jordaensis   and appear to have several small apical sensilla.

Adult. Color overall, medium brown; legs and antennae paler, wings irregularly mottled with small light brown spots. Male forewing 6.8 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 moderately produced, extending in broad arc or nearly linearly from dorsum; tergum IX reduced, forming a mesal projection over base of tergum X, projection mesal, short, tab­like. Tergum X tapered from base. Intermediate appendage heavily sclerotized, elongate, extending past preanal appendages, rod­like, arched, apex curved downward; apex subacute. 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, about 2x as long as wide, tapering apically; 2nd article subequal in length to 1st article, relatively narrow, especially at midlength; apex rounded, with small pad of short, stiff apicomesal setae. Phallobase tubular, relatively short and wide, slightly curved; endotheca more than 2x length of phallobase, with about 18 large spines, in paired series at about midlength.

Holotype male: BRAZIL: São Paulo: Parque Estadual de Campos do Jordão, Rio Galharada , 22°41.662'S, 45°27.783'W, el 1530 m, 13–15.ix.2002, Blahnik, Prather, Melo, Huamantinco, ( UMSP000200126 View Materials ) ( MZUSP). GoogleMaps  

Etymology. This species is named jordaensis   after the spectacular site where the holotype specimen was collected, Parque Estadual de Campos do Jordão.


Museu de Zoologia da Universidade de Sao Paulo