Helicopsyche (Feropsyche) angulata Flint 1981

Helicopsyche angulata

This species, frequently encountered at the Fish Hatchery, is related to the Peruvian H. extensa Ross. The males of the two species may be distinguished by the shape of the clasper. In H. angulata there is long, narrow basodorsal projection, and the mesobasal lobe is pointed in lateral, and angulate with a few spines in caudal aspect. The females of the two species at the Fish Hatchery may be distinguished by the shape of the vaginal sclerites and by the presence of the dark, oblique marks in H. vergelana.

ADULT.—Length of forewing, 4–4.5 mm. Color pale brown, antennae stramineous; forewing pale brown. Sixth sternum of male with a slender slightly flattened process, about half length of sternum; third through fifth sterna reticulate. Male genitalia: Ninth segment broadly rounded anteriad; ventral strap about as broad as dorsal strap. Tenth tergum with tip truncate in lateral, and shallowly cleft in dorsal aspect. Clasper with a long, narrow, erect dorsal lobe, and a broader posterior lobe which bears a mesal point; mesobasal lobe produced as a pointed process in lateral, and as a broad, angulate shelf with 3–5 spinelike setae in caudal aspect. Aedeagus with base slightly angled, and tip greatly enlarged. Female genitalia: Sixth sternum with a short pointed process, third through fifth sterna reticulate. Ninth sternum with posterior margin evenly convex, with narrow striations; laterally with an ovoid, depressed, darkened area whose surface is densely covered by darkened spinules. Vaginal sclerite shield shaped, with a central opening, supported by two long rodlike sclerites.

MATERIAL.—Holotype, male: VENEZUELA, ARAGUA, Maracay, Río Limón, Estacion Piscicultura, 3–6 Feb 1976, C.M. & O.S. Flint, Jr. USNM Type 76634.

Paratypes: Same data as holotype, 3 2; 22–27 Oct 1974, 1; 5–6 Nov 1974, 1; 19–20 Nov 1974, 1; 29–30 Jan 1975, 1 1 12–13 Feb 1975, 2 1 25–26 Feb 1975, 1; 11–12 Mar 1975, 1; 24–25 Mar 1975, 1; 22–23 Apr 1975, 1; 19–20 May 1975, 1; 1–2 Jul 1975, 1; 1; 15–16 Jul 1975, 1; 1; 11–12 Aug 1975, 2. Maracay, El Limón, 2–6 Feb 1976, C.M. and O.S. Flint, Jr., 1. Rancho Grande, 1100 m, 16–23 Oct 1966, S.S. and W.D. Duckworth, 1; 24–31 Oct 66, 1; 25 July 67, R.W. Poole, 1; 8 Aug 67, 1. BARINAS: 22 km NW Barinitas, 24 Feb 1976, C.M. and O.S. Flint, Jr., 1 Merida, La Pedregosa, 21 Feb 1976, C.M. and O.S. Flint, Jr., 1 1.

COLOMBIA, SANTANDER: San Joaquin, 30 Aug 1965, W.D. Duckworth, 2. ANTIOQUIA: Medellin, 8 Jan 1960, Gallego, 2. VALLES: Tablones, Finca La Florida, 1300 m, 7 Jan 1959, J.F.G. Clarke, 3 5.

ECUADOR, NAPO: San Francisco de Borja, 15 May 1975, Spangler, et al., 1.

Figures 3–169

Helicopsyche angulata Flint

Helicopsyche angulata Flint, 1981a:37–38.

Originally described from Venezuela, Colombia (Santander, Antioquia, and Valle del Cauca), and Ecuador, this species is found to be common and widespread in Antioquia and was the most abundant species of caddisfly taken in emergence trap B.

MATERIAL.—COLOMBIA. DPTO. ANTIOQUIA: Quebrada El Pozo, 8 km W El Peñol, 9 Feb 1983, O.S. Flint, Jr., 1. Quebrada Minitas, NW San Felix, 13 Feb 1983, O.S. Flint, Jr., 1. Quebrada Honda, Marsella [12 km SW Fredonia], 1450 m, 3–4 Mar 1984, C.M. & O.S. Flint, Jr., 3, 20; same, but 22 Feb 1983, O.S. Flint, Jr., 34, 27. Río Medellín, 6 km S Caldas, 24 Feb 1984, C.M. & O.S. Flint, Jr., 1. Río Aurrá, Km 50, E San Jerónimo, 14 Feb 1983, O.S. Flint, Jr., 2. Quebrada La García, 20 km NW Medellín [road to San Pedro], 20 Feb 1984, C.M. & O.S. Flint, Jr., 1. Quebrada El Retiro, 16 km NW Medellin [road to San Pedro], 20 Feb 1984, C.M. & O.S. Flint, Jr., 23. Quebrada Espadera, 7 km E Medellín [road to Sta. Elena], 24 Feb 1983, 2. Quebrada La Ayurá, Envigado (trap B), Apr 1983-Mar 1984, U. Matthias, 471, 501. Medellín, 8 Jan 1960, Gallego, 2. There are specimens from the Colombian Departments of Meta, Santander, and Valle del Cauca in the NMNH.