Smicridea (Rhyacophylax) pseudoradula Flint 1991

Smicridea (Rhyacophylax) pseudoradula

S. (R.) radula Flint and this species are very closely related, agreeing in all structure of the genitalia except the apex of the phallus. In S. (R.) radula the dorsal lobe is large and greatly overhangs the ventral lobe, which bears the spiculate patch. In S. (R.) pseudoradula, the dorsal lobe is not produced and the spiculate patch is clearly lateral in position.

ADULT.—Length of forewing, 4 mm. Width of eye of male in dorsal aspect ½ that of interocular distance. Color stramineous; forewing with darker mark along chord, with a subterminal dark band bordered inwardly by paler brown and outwardly by slightly darker brown. Male with anterolateral processes of fifth sternum pale, extending to middle of sixth sternum. Male genitalia: Ninth segment with anterior margin produced into an upturned lobe; posterior margin ventromesally produced between base of claspers. Tenth tergite short, broadly rounded, with a distinct pointed process beneath apex. Clasper with basal segment inflated apicad; apical segment with apex rounded. Phallus with base enlarged and at right angles to stem; tip with a dorsal lobe bearing a few lateral spicules (number variable, often lacking), with strongly sclerotized lateral plates bearing spicules; with internal sclerites long and threadlike.

MATERIAL.—Holotype, male: COLOMBIA. DPTO. ANTIOQUIA: Río Aurrá, km 50, E San Jerónimo, 14 Feb 1983, O.S. Flint, Jr. USNM Type.

Paratypes: Same data as holotype, 7, 5. Río Aurrá, 7 km W San Jerónimo, 22–23 Feb 1984, C.M. & O.S. Flint, Jr., 8, 4. ECUADOR. PCIA. NAPO: 3 km N Tena at river, 5 Jul 1976, J. Cohen, 8d, 2. Lago Agrio, 19 Sep 1975, A. Langley, 1d“. 3 km NE Lago Agrio, 17 May 1975, Spangler, et al., 1. VENEZUELA. EDO. BARINAS: Puente Parangula, 8 km S Barinitas, 18 Feb 1976, C.M. & O.S. Flint, Jr., 12, 14. Río Santo Domingo, Barinas, 27 Feb 1976, C.M. & O.S. Flint, Jr., 8. EDO. ZULIA: El Tucuco, 45 km SW Machiques, 5–6 Jun 1976, Menke and Vincent, 3; same, but Río El Tucuco, ½ mi [~1 km] from Missión El Tucuco, 1–5 Oct 1979, H.M. Savage, 13.