Alterosa, a new caddisfly genus from Brazil (Trichoptera: Philopotamidae)
Author
Blahnik Table Of Contents, Roger J.
text
Zootaxa
2005
2005-05-23
991
1
1
60
https://biotaxa.org/Zootaxa/article/view/zootaxa.991.1.1
journal article
10.11646/zootaxa.991.1.1
11755334
5046283
Alterosa schadrackorum
,
new species
Fig. 24A–E
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
) (
MZUSP
).
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
)
.
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.