Cernotina odonta, Santos, Allan Paulo Moreira & Nessimian, Jorge Luiz, 2008

Santos, Allan Paulo Moreira & Nessimian, Jorge Luiz, 2008, Five new species of Cernotina Ross (Trichoptera: Polycentropodidae) from Central Amazonia, Brazil, Zootaxa 1899, pp. 25-33 : 26-27

Cernotina odonta sp. nov.

Figs. 1–4

Description. Male. Length of each forewing 4.0 mm. General color, in alcohol, pale yellow; head and dorsum of thorax with golden setae, antennae stramineous, wings light brown with light yellow setae, legs stramineous with setae dark brown. Male genitalia. Sternum IX short, trapezoidal, anterior margin slightly excavated, and wide posteriorly ( Fig. 3 ). Tergum X membranous, divided into 2 lobes tapering to apex, with fine setae on all surfaces ( Fig. 2 ). Preanal appendages with dorsolateral lobes apparently absent ( Figs. 1, 2 ); and with ventromesal lobes simple, curved inward, and each bearing stout dark spine apically ( Figs. 1, 2 ). Inferior appendages elongate (longer than tergum X), longitudinally concave along internal face, bearing fine setae on all surfaces and each with 2 spine-like setae basally; base broad, abruptly narrowed apex curved inward with internal margin excavated; basodorsal lobe short, tooth-like, partially fused with main body of inferior appendage, bearing 4 spine-like setae in internal margin, apical margin dark and strongly sclerotized ( Figs. 1, 3 ). Phallus tubular, without distinct phallicata sclerite or spines internally, but bearing internal rows of protuberances with sclerotized apices ( Fig. 4 ).

Remarks. Cernotina odonta sp. nov. is a very distinctive species and perhaps it is related to C. compressa Flint, 1971 , as indicated by the short basodorsal lobe broadly fused with the main body of each inferior appendage. The new species differs from C. compressa and other species of the genus by the inferior appendages each being longitudinally concave along its internal face with a notch on the internal apex and each having its basodorsal lobe short, tooth-like, largely fused with the appendage and with spine-like mesal setae.

Holotype male: BRAZIL: Amazonas: Manaus, tributary to Igarapé do Lobisomem , basin of Rio Cuieiras, 2°33'46.4''S, 60°19'03.4''W, 22.viii.2004, J.L. Nessimian & L. Fidelis, light trap ( INPA).

Etymology. From the Greek odonta (“tooth”) in allusion to the shape of the basodorsal lobe of each inferior appendage.

Figures

FIGURES 1 – 4. Cernotina odonta sp. nov. (1) male genitalia, left lateral; (2) tergum X, and ventromesal lobe of the preanal appendages, dorsal; (3) sternum IX, and inferior appendages, ventral; (4) phallus, left lateral. Scale = 0.1 mm.