Generic characters of Chalcothore De Marmels, 1985, with notes on the male of C. montgomeryi (Racenis, 1968) and a description of the larva (Zygoptera: Polythoridae)

Subsequent to a preliminary description (1985 Resum. IX Congr. venez. Em.. Sait Cristobal, p. 63), the genus Chalcothore De Marmels is here described in detail. It combines characters of Euthore Selys and Chalcopteryx Selys, but also shows a series of original features, viz. short digitiform inferior anal appendages, an ovoid-shaped (in ventral view) distal penis segment, short petiolation of the wings, broad anal field in all wings, absence of sexual dimorphism in wing color pattern, a pantepuyan distribution. It is suggested that Chalcothore is an ancient monotypic genus closely related to the common ancestor of both. Euthore and Chalcoplervx. The ultimate instar exuviae of Chalcothore montgomeryi (Racenis) are described and figured. Notes on the habitat of the sp. and on the associated odon. fauna are added.