Smicridea (Rhyacophylax) magnipinnata Flint 1991

Smicridea (Rhyacophylax) magnipinnata

This is a very distinctive species of unknown relationship within the subgenus. It is the largest species known, and is very distinctively colored. The genitalia are equally unusual, especially the lobe on the basal clasper segment and the high, arching phallus with its unusual apicolateral lobes.

ADULT.—Length of forewing, male 8–9 mm, female 10–11 mm. Width of eye of male in dorsal aspect about 1/3 that of interocular distance. Color pale stramineous, antennae annulate; forewing pale stramineous in male with apical fourth whitish and with a whitish transverse band near midlength; in female with wings brown between pale bands. Male abdomen with processes of fifth sternum 1½ times as long as stemum. Male genitalia: Ninth segment with anterolateral angle greatly produced, with dorsum expanded, overhanging lateral margin in dorsal aspect, with a deep, membranous area laterally between it and tenth tergum. Tenth tergite tapering apicad in both lateral and dorsal aspects. Clasper with basal segment long, with ventromesal margin produced into a distinct lobe; apical segment straight, apex rounded. Phallus tubular, with base large and erect, stem arched dorsad from base, tip slightly inflated; apex with rounded lateral plates, connected dorsally and with a dorsomesal notch; internal sclerites broad, quite indistinct.

MATERIAL.—Holotype. male: COLOMBIA. DPTO. ANTIOQUIA: 10 km E Medellín [road to Las Palmas], 6 Feb 1983, O.S. Flint, Jr. USNM Type.

Paratypes: Same data as holotype, 2. Quebrada Agua Mala, 34 km NW Medellín [road to San Jerónimo], 23 Feb 1984, C.M. & O.S. Flint, Jr., 1. Urrao, 2000–2500 m, 18 Mar 1984, U. Matthias, 1.