Frenguelliidae, a new family of dragonflies from the earliest Eocene of Argentina (Insecta: Odonata):: phylogenetic relationships within Odonata

The new dragonfly family Frenguelliidae based on Frenguellia patagonica gen. nov., sp. nov., is erected from the earliest Eocene of Patagonia (Argentina). Its phylogenetic relationships within the Zygoptera and Epiproctophora ( sensu Bechly, 1996) are discussed. The new family seems to be related to Sieblosiidae from the Oligo-Miocene of Eurasia; and both could pertain to the basal lineage of Epiproctophora. These attributions are not supported by the known stratigraphic data and could be explained by the incompleteness of the fossil record of Odonata, mainly in the Triassic.