Smicridea (Rhyacophylax) nanda Flint 1983

Smicridea (Rhyacophylax) nanda

In many characteristics of the male genitalia, this species appears to be closely related to S. (R.) weidneri Flint; however it may be easily recognized by the structure of the apex of the tenth tergite, the tip of which is strongly sclerotized mesoventrally, and by the apical segment of the clasper, the tip of which in dorsal aspect is evenly acuminate.

ADULT.—Length of forewing, 5–6 mm. Width of eye of male middorsally that of interocular distance. Color brown; forewing with faint darkening around crossveins and in an obscurely paler band subapically. Anterolateral process of fifth sternum as long as sternum; without internal sacs.

Male Genitalia: Ninth segment with anterolateral process broadly expanded. Tenth tergum basolaterally with a well-marked carina; tergite pointed, heavily sclerotized on mesal face; ventrolateral margin developed into a strong ridge. Clasper with basal segment long; apical segment in dorsal aspect evenly acuminate, mesal face slightly concave with a few specialized setae. Aedeagus enlarged basad, stem angled slightly ventrad; apex with rather simple internal sclerites.

MATERIAL.—Holotype (male): ARGENTINA, PCIA. MISIONES, Río Iguazú, Camp Nañdu, 25 Nov 1973, O.S. Flint, Jr., USNM Type 100538.

Paratype: Same data as holotype, 1.