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Comprehensive Description

provided by Smithsonian Contributions to Zoology
Smicridea (Smicridea) olivacea

This species is very closely related to S. aterrima Ulmer, but the tip of the tenth tergite is narrower in dorsal aspect, and the shape of the aedeagus is quite different, especially the tips of the dorsal sclerites, which are decurved in S. olivacea.

ADULT.—Length of forewing, 5–6 mm. Color a nearly uniform olive brown; forewing with 2 slightly paler spots at the level of the stigma. Male abdomen with anterolateral process of fifth sternum barely attaining posterior margin of segment; with 2 pairs of very large, flattened, reticulate, internal pouches.

Male Genitalia: Ninth segment nearly vertical anteriorly, wide dorsally. Tenth tergite ending in an upturned point in lateral aspect; tapering to a mesal point, rounded laterally in dorsal aspect. Clasper with basal segment long, parallel-sided; apical segment parallel-sided, apex obliquely truncate. Aedeagus angled from base, apical third directed slightly dorsad; tip rounded dorsally, with a pair of dorsal lobes, the apices of which are angled sharply ventrad, with an internal complex.

MATERIAL.—Holotype (male): ARGENTINA, PCIA. CATAMARCA, Arroyo El Pintado, near La Viña, 18 Oct 1973, O.S. Flint, Jr., USNM Type 100529.

Paratypes: PCIA. SALTA, Payogasta, 13 Oct 1973, O.S. Flint, Jr., 2; Río Brealito, 12 Oct 1973, O.S. Flint, Jr., 1.
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bibliographic citation
Flint, Oliver S., Jr. 1983. "Studies of Neotropical Caddisflies, XXXIII: New Species from Austral South America (Trichoptera)." Smithsonian Contributions to Zoology. 1-100. https://doi.org/10.5479/si.00810282.377