Polycentropus itatiaia Hamilton & Holzenthal

Hamilton, Steven W. & Holzenthal, Ralph W., 2011, Twenty-four new species of Polycentropus (Trichoptera, Polycentropodidae) from Brazil, ZooKeys 76, pp. 1-53 : 26-28

Polycentropus itatiaia Hamilton & Holzenthal sp. n. Fig. 14

Description.

Most similar to Polycentropus aguyje and Polycentropus santateresae sp. n., Polycentropus itatiaia sp. n. differs in the shape and depth of the emargination in the posterior margin of the inferior appendage as well as the median position of the relatively low mesoventral spine of this appendage. The mesolateral process of the preanal appendage in Polycentropus itatiaia sp. n.is triangular, as it is in Polycentropus carolae , and the mesoventral process is shorter and directed more ventrad.

Adult. Length of forewing (male) 6-6.5 mm. Body dark brown; dorsum of head and thorax black, clothed with long, erect dark setae; base of forewing with long, erect black setae, general vestiture of forewing with fine black setae, lacking patches of pale setae; legs dark brown to black.

Male. Genitalia as in Fig. 14. Sternum IX in lateral view subtriangular, about 2/3 height of segment VIII; in ventral view slightly trapezoidal, anterior corners sharply rounded, sides slightly convex, anterior margin shallowly concave, posterior margin slightly concave with very broad, shallow convex medial region. Terga IX + X membranous. Intermediate appendage slightly curved on basal 1/2 and relatively straight for remainder of length, very long, length greater than height of abdomen, basal region slightly expanded; in dorsal view nearly uniform in diameter throughout length, gradually narrowing apically. Mesolateral process of preanal appendage very short, apex slightly triangular, at base broadly joined to medial portion of mesoventral process; mesoventral process directed ventrocaudad, digitate, slightly shorter than length of mesolateral process. Inferior appendage in lateral view short, quadrate; posteroventral margin rounded, protruding below deep caudal emargination; dorsolateral flange low, straight dorsally, with prominent caudomesal spine, slightly exposed in lateral view; mesoventral spine present, broad, in lateral view obtuse, positioned medially; in ventral view inferior appendage approximately round, caudomesal spine partially hidden, acute; mesoventral spine hidden. Phallobase moderately short; in lateral view apicoventral projection narrow, approximately equal to apical diameter of phallobase apex, with 1 point; endothecal sclerotic band narrow, becoming less sclerotized apically; endothecal spines absent; phallotremal sclerite narrow in dorsal aspect. Subphallic sclerite Y-shaped, arms long, pedicel with broad lateral expansions; broad in lateral view, ventrally somewhat narrowed.

Holotype male:

BRAZIL: Rio de Janeiro: Parque Nacional do Itatiaia, trib. to Rio Taquaral, 22°26.688'S, 44°36.464'W, 1320 m, 6.iii.2002, Holzenthal, Blahnik, Prather (UMSP000136573) (MZUSP).

Paratypes:

same data as holotype, 1 female (MZUSP); Parque Nacional do Itatiaia, Rio Campo Belo, trail to Véu da Noiva, 22°25.706'S, 44°37.171'W, 1310 m, 5.iii.2002, Holzenthal, Blahnik, Paprocki, Prather, 1 male, 1 female (UFRJ); Parque Nacional do Itatiaia, Rio Campo Belo, 22°27.033'S, 44°36.818'W, 1300 m, 7.iii.2002, Holzenthal, Blahnik, Paprocki, Prather, 5 males, 2 females (UMSP); Minas Gerais: Ibitipoca, sitio of Anestis Papadopolous, 21°43.227'S, 43°54.557'W, 1200 m, 23.x.2000 m, Paprocki, 2 males (UFBA).

Etymology.

Named for Parque Nacional Itatiaia where the type specimens were collected. Itatiaia means "many-pointed rock" in Tupi-Guarani.