A list of 77 species in 37 genera and 10 families recorded in Marambaia, Rio de Janeiro, Brazil is presented. Eight species (Hetaerina brigthwelli (Kirby); Lestes tricolor Erichson; Ischnura fluviatilis Selys; Leptagrion andromache Hagen in Selys; Triacanthagyna nympha (Navás); Triacanthagyna septima (Selys in Sagra); Zonophora campanulata campanulata (Burmeister) and Micrathyria borgmeieri Santos) have been recorded for the first time for the region, enlarging the knowledge about Odonata species of Rio de Janeiro State. Comments about new records and additional relevant literature are discussed.
Endemic to Brazil, the genus Minagrion Santos, 1965 is revised for the first time. The genus contains five species, and here we establish diagnostic characters, keys and drawings for both sexes. Furthermore, we propose the synonymy of M. franciscoi Machado & Bedê, 2015 new syn. with M. caldense Santos, 1965.
Acanthagrion hildegarda Gloger, 1967 (Odonata: Zygoptera: Coenagrionidae) is a common inhabitant of lentic environments in Argentina and Uruguay. However, precise georreferenced data are scarce in the literature. This work provides the first updated georreferenced list of localities and map of distribution of A. hildegarda, including new country records for Brazil and departamental records for Uruguay, accompanied by illustrations and scanning photographs of its main diagnostic characters.
Larva and pupa of the Patagonian species Culicoides lacustris Ronderos are described in detail with phase-contrast microscope at oil immersion and scanning electron microscope. Studied specimens were collected in a wetland, alongside to the Provincial Route 12, between the cities of Esquel and Gualjaina in the Chubut Province. They are compared with the more similar congener, Culicoides venezuelensis Ortiz & Mirsa.
The final instar larvae of Acanthagrion gracile and A. lancea are described and illustrated based on reared specimens from Rio de Janeiro and Espírito Santo States, Brazil, being compared with the other known larvae of this genus.
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