Polycentropus verruculus Hamilton & Holzenthal

Hamilton, Steven W. & Holzenthal, Ralph W., 2011, Twenty-four new species of Polycentropus (Trichoptera, Polycentropodidae) from Brazil, ZooKeys 76, pp. 1-53 : 34-35

Polycentropus verruculus Hamilton & Holzenthal sp. n. Fig. 18

Description.

A member of the jorgenseni species complex, Polycentropus verruculus sp. n.is separated from others of this complex by the straight, blade-like intermediate appendage, the setose lateral knob on the mesolateral process of preanal appendage, and the very compact inferior appendage with its apicomesal tooth. Like Polycentropus cipoensis , the apicoventral process of the phallobase is broad and apically emarginated, but in Polycentropus verruculus sp. n. the process is much longer and the emargination v-shaped.

Adult. Length of forewing (male) 5.5 mm. Body pale brown to yellow; dorsum of head and thorax brown, clothed with long, erect brown setae; base of forewing with long, erect black setae, general vestiture of forewing with fine brown setae and many patches of pale setae scattered over surface; legs stramineous.

Male. Genitalia as in Fig. 18. Sternum IX in lateral view trapezoidal, slightly greater than 1/2 height of segment VIII; in ventral view slightly trapezoidal, anterior corners very sharply rounded, sides slightly convex, anterior margin moderately concave, posterior margin slightly concave with small, shallow convex medial region. Terga IX + X mostly membranous with light dorsal sclerotization basally; with numerous scattered minute spicules and several long, slender setae. Intermediate appendage straight, moderate elongate, length equal to height of sternum IX, basal region simple, not expanded; in dorsal view with basal 2/3 blade-like, apical 1/3 narrowed abruptly, apex acute. Mesolateral process of preanal appendage short, apex rounded, laterally with laterally-directed, setose, bulbous lobe. Mesoventral process of preanal appendage absent. Inferior appendage in lateral view short, quadrate; dorsolateral flange low, slightly rounded dorsally, with broad caudomesal spine, hidden in lateral view; mesoventral spine absent; in ventral view inferior appendage rhomboidal, broadest apically, caudomesal spine partially hidden, obtusely pointed. Phallobase moderately elongate; in lateral view apicoventral projection very broad, slightly longer than apical diameter of phallobase apex, with 2 points; separated by mesal v-shaped notch over apical 1/3; endothecal sclerotic band very broad, becoming less sclerotized apically; endothecal spines absent; phallotremal sclerite narrow in dorsal aspect. Subphallic sclerite U-shaped, arms short, pedicel absent; narrow in lateral view, ventrally somewhat broadened.

Holotype male:

BRAZIL: Minas Gerais: Rio Guanhães, downstream from Salto Grande dam, 19°06.289'S, 42°42.635'W, 20.x.1998, Paprocki (UMSP000046608) (MZUSP).

Paratype:

BRAZIL: São Paulo: Altinópolis, Fazenda Sáo João da Mata, Rio Baguassu, 21°00.588'S, 47°28.900'W, 745 m, 19-21.xi.2003, Holzenthal, Paprocki, Calor, 1 male (UMSP)

Etymology.

Diminutive form of the Latin word for wart, in reference to the wart-like structure on the preanal appendage.