Platyplastinx obscurus (Bravo, Lago & Castro, 2004) comb. nov.

Alepia obscura Bravo, Lago & Castro, 2004:594, Figs. 30–35.

Diagnosis. Hypandrium narrow, strongly sclerotized, U-shaped; paramere approximately triangular, shorter than the aedeagus; cercus piriform, apical area short, 1/4 times the length of basal and ovoid area; cercus with long apical tenacula, approximately the same length as the cercus, with a clavate and hairy apex; ejaculatory apodeme rectangular in dorsal view, 0.35 times the length of aedeagus.

Material examined. Holotype male: BRAZIL, São Paulo, Ribeirão Preto, 27.III.1994, Bravo, F. (MZFS).

Paratypes: 5 males, same locality and collector of the holotype: 15.III.1994 (MZFS), 23.III.1994 (MZFS), 27.IV.1994 (MZFS), 10.V.1995 (MZFS), 15.V.1995 (MZFS).

Distribution. Known only from the type locality.

Comments. Platyplastinx obscurus differs from other species of the genus by the shape of the hypandrium, which is narrow in this species, U-shaped, and more sclerotized than in the other species of the genus. Although only 5 rod-like accessory tenacula were illustrated in the original description of this species by Bravo et al. (2004), a reexamination of the type material showed 7 rod-like short tenacula along the distal half of the dorsal surface of the cercus.