Early Cretaceous zygopteroids of southern England, with the description of Cretacoenagrion alleni gen. nov., spec. nov. (Zygoptera: Coenagrionidae; ”Anisozygoptera”: Tarsophlebiidae, Euthemistidae)

The remains of damselflies are infrequent in the early Cretaceous (Wealden) beds of south-east England but include some interesting forms: Crelacoenagrion alleni gen. n., sp. n. (Coenagrionidae) is one of the earliest records of this important extant family; ’’Mesozoic Anisozygoptera" include Tarsophlebia? sp. (Tarsophlebiidae) and Euthemis sp. (Euthemistidae), the latter comprising the only European and Cretaceous record of this extinct family. The infrequency of damselflies and lack of larval Odonata generally in the English Wealden is attributed to saline incursions into the basin of deposition.