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{{#cargo_store: _table = TaxonInfo |name = Astergnathidae |rank = Family |parent = Astergnathiformes |ancestor =


Astergnathidae is a family of Astergnathiformes distinguished by the lack of vertebrae in front of the pelvic ring. They typically have a membrane between their anal fingers which can be pulled back for mating, and their lateral arms are modified to be flipper-like.

All Astergnathid species have a pelvic ring and vertebrae. They swim with horizontal tail fins, like a Terran dolphin, and they have four sets of gills. While having pinhole eyes is the ancestral state, most species have since evolved camera eyes of varying complexity.

Subgroups and Classifications

The following are in this family: {{#cargo_query:table=SpeciesInfo|fields=_pageName=Species|where=Family="Astergnathidae"|format=ul}}