Xenorophidae

Xenorophidae is an extinct family of odontocetes, currently known from the Oligocene of the Southeastern United States.

Known genera of xenorophids include Albertocetus, Archaeodelphis, Xenorophus,[2] Cotylocara,[3] Echovenator,[4] and Inermorostrum.

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Albertocetus reconstruction outline, showing known bones in red. From Boessenecker et al. 2017