Chimarra (Chimarra) onima Flint 1991

Chimarra (Chimarra) onima

This species and C. (C.) emima Ross are very closely related, only to be distinguished by differences in the tenth tergum and claspers in the male genitalia. In C. (C.) onima, the dorsal margin of the tenth tergum is produced into a flat, free lobe extending posteriad, and the posteroventral angle of the clasper is slightly more produced.

ADULT.—Length of forewing, 4.5–5 mm. Color fuscous, femora of legs slightly more tawny. Forewing with a well-developed bulla in radial system; hindwing with 3 branches to Rs and 3 to M. Male genitalia: No tergal lobes. Ninth segment moderately produced anteroventrally. Tenth tergum with dorsal margin strongly sclerotized with 2 sensillae on each side; dorsal margin produced at midlength into a rounded lobe free of and parallel to the apical section as seen in dorsal aspect; apical section elongate, narrowed apicad, lightly sclerotized. Cercus a small, ovoid lobe. Clasper with posterior margin nearly straight; posterodorsal angle produced into a mesal hook, posteroventral angle slightly produced, margin with a row of enlarged setae. Phallus tubular, apicoventral angle produced into a spine; base inflated; internally with 2 unequal spines, a slender basal rod and ring assembly, and a spiculate pouch.

MATERIAL.—Holotype, male: COLOMBIA. DPTO. ANTIOQUIA: Quebrada Agua Mala, 34 km NW Medellín [road to San Jerónimo], 14 Feb 1983, O.S. Flint, Jr. USNM Type.

Paratypes: Same data as holotype, 9, 5; same, but 22 Feb 1984, C.M. & O.S. Flint, Jr., 1.18 km E of San Jerónimo, 23 Feb 1984, C.M. & O.S. Flint, Jr., 1, 1. Quebrada Honda, Marsella [12 km SW Fredonia], 1450 m, 22 Feb 1983, O.S. Flint, Jr., 25.

Chimarra onima là một loài Trichoptera trong họ Philopotamidae. Chúng phân bố ở vùng Tân nhiệt đới.