Redescription of Argia concinna (Rambur), with a description of Argia telesfordi spec. nov. from Grenada, West Indies (Zygoptera: Coenagrionidae)

摘要

Argia telesfordi sp. nov. a new species close to Argia concinna, is described from Grenada. Both species are illustrated and diagnosed. They can be distinguished by morphology of male tori, cerci and paraproct and female mesostigmal laminae. Their distribution is allopatric, with Argia telesfordi distributed on Grenada and Argia concinna known only from Guadeloupe and Dominica. With more than 110 species, the genus Argia is the most speciose genus of the Coenagrionidae in the New World of which onlyone, Argia concinna (Rambur), is known from the West Indies. Agrion concinnum was first described by Rambur (1842) without illustrations. Hagen in Calvert (1902) and Ris (1921) provided illustrations of the male caudal appendages based on Rambur's type specimens. Unfortunately, the syntype male now lacks the caudal appendages, as stated by Gloyd (1941).