DescriptionCastorocaudaBW.jpgCastorocauda lutrasimilis, a docodont from the Middle Jurassic of China, digital Date 15 April 2008 Source Own work Author
org/licenses/by/3.0CC BY 3.0 Creative Commons Attribution 3.0 truetrue Castorocauda_BW.jpg This file is licensed under the Creative Commons Attribution 3.0
mammaliaformes (Castorocauda, Ornithorhynchus, Megazostrodon and Morganucodon). Date 27 October 2019 Source Based on: File:CastorocaudaBW.jpg File:Platypus.jpg File:Megazostrodon