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Prevalence of Harpellales from Chironomidae larvae in phytotelmata from Punta Lara Forest, Argentina

     Centro de Estudios Parasitológicos y de Vectores (CEPAVE) (CONICET-UNLP) calle 2 Nu. 584 (1900) La Plata, Argentina

Gerardo A. Marti

     Centro Regional de Investigaciones Científicas y Transferencia Tecnológica (CRILAR) calle Entre Ríos y Mendoza s/n (5301) Anillaco - La Rioja, Argentina

Claudia C. López Lastra

     Centro de Estudios Parasitológicos y de Vectores (CEPAVE) (CONICET-UNLP) calle 2 Nu. 584 (1900) La Plata, Argentina

Harpellales (Zygomycota: Trichomycetes) fungi are cosmopolitan obligate inhabitants of the gut of immature insects. A biweekly survey of gut fungi associated with chironomid (Chironomidae: Diptera) larvae living in the impounded water from Eryngium cabrerae (Apiaceae) phytotelmata from Punta Lara forest, Argentina, was done Jan 2003–Dec 2004. Two species of Harpellales were associated with chironomid larvae, Smittium phytotelmatum in the hindgut of Polypedilum sp. and Stachylina lentica in the midgut of both Polypedilum sp. and Metriocnemus eryngiotelmatus. No statistically significant differences were recorded in the prevalence of these Harpellales between seasons. Environmental variables (temperature, rainfall and relative humidity), impounded water volume, pH and chironomid larval density did not have an effect on the prevalence of the Trichomycetes.

Key words: Chironomidae, Diptera, Harpellales, phytotelmata, Trichomycetes