dcsimg

Comprehensive Description

provided by Smithsonian Contributions to Zoology
Marilia eleutheria

This is the largest of the species here described with spurs 2,4,2. In addition, the genitalia of the male, especially the apicolateral flap of the tenth tergum, the shape in dorsal aspect of the cercus, and the strong mesobasal shoulder of the clasper, are distinctive.

ADULT.—Length of forewing, 9.5 mm. Color brownish gray; body and appendages with white hairs, antennae indistinctly annulate; forewing brownish-gray, darker markings along chord. Eyes of male virtually touching middorsally. Spurs 2,4,2.

Male Genitalia: Ninth segment with anterior margin slightly expanded laterally; dorsal and ventral braces slightly oblique, almost parallel. Cercus longer than tenth tergum, in dorsal aspect evenly curved, parallel-sided. Tenth tergum with apex oblique, dorsum longest, with a narrow apicolateral flap; in dorsal aspect membranous apicomesally, with a small, subapical, lateral angle. Clasper with basal segment almost parallel-sided, in posterior aspect with a distinct mesobasal shoulder; apical segment elongate, tapering apicad. Aedeagus barely curved basally; phallotremal sclerite with a curled, dorsomesal process and a ventral funnel-like sclerite.

MATERIAL.—Holotype (male): ARGENTINA, PCIA. MISIONES, Río Iguazú, Camp Nañdu, 25 Nov 1973, O.S. Flint, Jr., USNM Type 100552.

Paratypes: Puerto Libertad, 24 Nov 1973, O.S. Flint, Jr., 1. PARAGUAY, DPTO. ALTO PARANÁ, Salto de Guaira, 4 Dec 1971, L.E. Peña G., 3. URUGUAY, DPTO. ARTIGAS, costa Río Uruguay, Barra Arroyo Guaviyú, 22 Dec 1954, C.S. Carbonell, 1; San Gregorio, 29 Nov 1959, Carbonell, Mesa, and San Martin, 3 (FHCU).
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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