Alterosa schadrackorum, 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 : 48

publication ID 10.11646/zootaxa.991.1.1


persistent identifier

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scientific name

Alterosa schadrackorum

new species

Alterosa schadrackorum , new species

Fig. 24A–E View FIGURE 24

This species differs from all other species of Alterosa by the short, knob­like intermediate appendages, studded with numerous short sensilla or sensilla­like projections, and also by the relatively widened, but not distinctly truncate, apex of the 2nd article of the inferior appendage.

Adult. Color overall, including legs palps and antennae, dark brown; wings sparsely and irregularly mottled with small light brown spots. Male forewing 5–5.5 mm.; female 6.0 mm.

Male genitalia. Tergum VIII without posteromesal invagination. Sternum IX with anterolateral margin rounded and projecting, broadly apodeme­like; posterolateral margin distinctly invaginated dorsally, very broadly produced ventrally; tergum IX apparently absent. Tergum X elongate, relatively simple in structure, apex rounded and sensillate; preapically with acute, crest­like dorsal projection; basolaterally with broadly rounded wing­like expansions on either side, each expansion with acute spine­like projection at widest point. Intermediate appendage short, rounded, knob­like, apically with numerous short sensilla. Preanal appendage simple in structure, elongate narrow, slightly widened apically; surface with numerous minute seta­like scales and scattered setae, each in rather distinct dimple­like invagination. Inferior appendages elongate, relatively wide, 1st article slightly flattened on mesal surface, 2nd article distinctly, concavely so; 1st article, as viewed laterally, wide basally, tapering slightly to apex; 2nd article shorter and narrower than basal segment, widened apically, apex subequal in width to apex of 1st article, rounded in lateral view; apicomesal margin of 2nd article with pad of short peg­like setae, basomesal surface with several stout setae. Phallobase narrow, tubular, strongly flexed at base, gradually curved and narrowed apically; endotheca with numerous spines of different lengths, apparently arranged into several tracts; as viewed retracted in phallobase, with approximately 8 elongate basal spines, 7 shorter spines at midlength (2 strongly curved), and 6 small apical spines.

Holotype male: BRAZIL: Santa Catarina: Parque Ecológica Spitzkopf, Rio Caeté above 1st falls, 27°00.35'S, 49°06.70'W, el 170 m, 4.iii.1998, Holzenthal, Froehlich, Paprocki, ( UMSP000033076 View Materials ) ( MZUSP). GoogleMaps

Paratypes: BRAZIL: Santa Catarina: — 1 female, same locality data as holotype ( MZUSP) ; — 1 male, Parque Ecológica Spitzkopf, confl. Rio Ouro & Rio Caeté , 27°00.352'S, 49°06.693'W, el 140 m, 3.iii.1998, Holzenthal, Froehlich, Paprocki, ( UMSP) GoogleMaps .

Etymology. This species is named schadrackorum in honor of Mr. Hans Schadrack and his father, Udo, a great lover of nature, who began maintaining Spitzkopf as a protected area.


Museu de Zoologia da Universidade de Sao Paulo


University of Minnesota Insect Collection