Smicridea (Smicridea) breviuncata Flint 1974

Smicridea (S.) breviuncata

This is a very distinctive new species that belongs to the fasciatella group, but differs greatly from all other described species. The very short and inflated basal segment of the claspers, and the broad (in dorsal aspect) tenth tergite are distinctive as is the bispinous apex of the aedeagus. The very deep, rounded incision in the ventral margin of the ninth tergum of the female is equally distinctive.

ADULT.—Length of forewing 5–6 mm. Color fuscous, legs paler basally, head with white hair anteromesally; forewing fuscous with 2 transverse white bands (cf. Figure 20). Male genitalia: Ninth segment narrow laterally, with anterior margin nearly vertical. Tenth tergite narrow and short in lateral aspect, with a small apical point; in dorsal aspect very broad, rounded apically. Clasper with basal segment very short and broad, with a mesal patch of peglike setae apically; apical segment with tip slightly hooked. Aedeagus tubular, with basal and apical sections meeting at an angle of about 115°; apex with a pair of slender, projecting rods. Female genitalia: Eighth sternite with posterolateral lobe broad, dark fold strongly curved, and posterior margin developed into a small lobe. Ninth tergum with anterolateral lobe rounded, ventral margin with a deep, rounded, indentation. Vagina with lateral and anterior support broad, central sclerite and opening usually borne nearly vertically.

IMMATURE STAGES.—Unknown.

MATERIAL.—Holotype, male: COSTA RICA, CARTAGO, Turrialba, 1–6 March 1965, S. S. and W. D. Duckworth. USNM Type 72694. Paratypes: La Suiza, 17 June 1967, Flint and Ortiz, 1 . Chitaria, 19 June 1967, Flint and Ortiz, 1 . PUNTARENAS: 2.8 miles E of Golfito, 3–4 July 1967, Flint and Ortiz, 6 1 .

PANAMA: PANAMA: Cerro Campana, July 1967, Wirth and Blanton, 2 .

BIOLOGY.—This species usually has been taken at lights, operated near small, tumbling, mountain brooklets in which the larvae probably occur.

Smicridea (Smicridea) breviuncata Flint

Smicridea (S.) bremuncata Flint, 1974b: 18.—Flint and Denning. 1989a:419.

This species has been known previously from Costa Rica and Panama. The Colombian examples from the Department of Chocó appear to agree with the Central American material (here figured) in all respects. Those examples from Antioquia differ in several ways: the tip of the tenth tergum in dorsal aspect is more rounded and broader, the segments of the clasper appear a bit longer proportionately, and the apex of the basal segment lacks the small cluster of peglike setae mesally. Except for the lack of setae, these all appear to be quantitative differences and the phallus is identical in all examples. For these reasons I believe all examples are one, rather variable, species.

MATERIAL.—COLOMBIA. DPTO. CHOCÓ: km 130, 86 km E Quibdó, 17 Feb 1983, O.S. Flint, Jr., 3. DPTO. ANTIOQUIA: 12 km N Fredonia [road to Medellín], 2000 m, 22 Feb 1983, O.S. Hint, Jr., 5, 3.

Smicridea breviuncata là một loài Trichoptera thuộc họ Hydropsychidae. Chúng phân bố ở vùng Tân nhiệt đới.