Alterosa escova, 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: 21

publication ID

http://doi.org/ 10.11646/zootaxa.991.1.1

DOI

http://doi.org/10.5281/zenodo.5047050

persistent identifier

http://treatment.plazi.org/id/EC4BE952-FFD6-681F-FEBD-CB228CA2EB52

treatment provided by

Felipe

scientific name

Alterosa escova
status

new species

Alterosa escova   , new species

Fig. 9A–D View FIGURE 9

This species is similar to Alterosa fluminensis   , A. flinti   , A. marinonii   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. marinonii   and A. fluminensis   it differs in the armature of the preanal appendages, which in A. escova   is brush­like and confined to the posterolateral margin of the appendage.

Adult. Color overall, dark brown; legs, palps, and antennae slightly paler, wings irregularly mottled with small light brown spots. Male forewing 6–6.7 mm.

Male genitalia. Tergum VIII with posteromesal margin slightly emarginate. Sternum IX with anterolateral margin broadly rounded; posteroventral margin greatly produced, extending sinuously from dorsum; tergum IX greatly reduced, membranous or fused to base of tergum X. Tergum X tapered from base, slightly expanded at midlength; apex sensillate, rounded as viewed dorsally, not or scarcely enlarged in lateral view. Intermediate appendage heavily sclerotized, moderately elongate, more or less spine­like and weakly scabrous, with scale­like spines along dorsolateral margin; apex acute. Preanal appendage greatly enlarged, wider at base than apex, elongate, with short, stout setae apically, extending along ventromesal margin; apex rounded; preanal appendage basally with flange­like process bearing cluster of prominent, stalked, spine­like setae, flange­like process large, rounded, with stout apicomarginal setae, mesal to appendage itself. 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, relatively short and wide, slightly curved dorsally; endotheca relatively short, with numerous short spines, apparently in several paired tracts, basolateral ones very short.

Holotype male: BRAZIL: São Paulo: small stream on São Paulo Route 247, 11 km SE Bananal, 22°45.684'S, 44°23.190'W, el 675 m, 23.ix.2002, Blahnik, Prather, Melo, Froehlich, Silva, ( UMSP000088791 View Materials ) ( MZUSP). GoogleMaps  

Paratypes: BRAZIL: Rio de Janeiro: — 1 male, Parque Nacional Itatiaia, Rio Taquaral , 22°27.252'S, 44°36.570'W, el 1300 m, 22–23.xi.2001, Holzenthal, Blahnik, ( NMNH) GoogleMaps   ; — 1 male, Parque Nacional Itatiaia, trib. to Rio Taquaral , 22°26.688'S, 44°36.464'W, el 1320 m, 6.iii.2002, Holzenthal, Blahnik, Prather, ( UMSP) GoogleMaps   .

Etymology. This species is named escova   , from the Portuguese word for brush, referring to the somewhat brush­like preanal appendages of this species. The word is used as a noun in apposition.

MZUSP

Museu de Zoologia da Universidade de Sao Paulo

NMNH

Smithsonian Institution, National Museum of Natural History

UMSP

University of Minnesota Insect Collection