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Trichomycetes living in the guts of aquatic insects of Misiones and Tierra del Fuego, Argentina

     CEPAVE (Centro de Estudios Parasitológicos y de Vectores) (CONICET-UNLP), 2 No. 584, (1900) La Plata, Argentina

Sixto Coscarón

     Museo de Ciencias Naturales, Paseo del Bosque s/n (1900) La Plata, Argentina

Fourteen species of Trichomycetes living in the guts of aquatic insects are reported from two provinces of Argentina, Misiones and Tierra del Fuego. Twelve of the species belong to the Harpellales and two are Amoebidiales. Five harpellid species are reported from Misiones in the extreme northeast of the country (Genistellospora homothallica, Harpella tica, Smittium culisetae, Smittium sp., Stachylina sp.) and seven are from Tierra del Fuego, the southern tip of South America (H. meridianalis, Glotzia sp., S. culicis, S. cellaspora, S. imitatum, Stachylina minima, Penella simulii). Insect hosts all were immature stages of Culicidae, Simuliidae, Chironomidae, Ceratopogonidae (Insecta: Diptera), and Ephemeroptera and Plecoptera. The lower diversity of Trichomycetes found at Misiones, which has a subtropical climate and rainforest vegetation, was due possibly to the warmer temperatures of the water (15–24 C), compared to the colder streams of Tierra del Fuego (9–15 C), with forests and steppes as typical vegetation.

Key words: biogeography, Chironomidae, Culicidae, Ephemeroptera, fungi, Harpellales, insects, Simuliidae

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