Ornithorhynchus anatinus
© 2001 California Academy of Sciences
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Diapsida
© 2000 Michel Laurin
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Salientia
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Lepidogalaxias salamandroides
© 1995 Tim M. Berra
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Megalocephalus
© 1977 Royal Society, London
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Sigmodontinae
© Scott J. Steppan
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Chiroptera
© Nancy B. Simmons
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Crassigyrinus scoticus
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Acanthostega gunnari
© 1997 University Museum of Zoology, Cambridge
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Rana epeirotica
© 1995 Hansjürg Hotz
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Pipa pipa
© 1995 David Cannatella
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Hyperolius
© 1995 David Cannatella
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Pseudidae
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Bombina orientalis
© 1995 David Cannatella
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Megophryidae
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Physalaemus cuvieri
© 1996 Adao Cardoso
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Phyllotis limatus
© Scott J. Steppan
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Hiodon alosoides
© 1998 Wayne E. Roberts, University of Alberta Museum of Zoology
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Ascaphus
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Physalaemus moreirae
© 1996 Adao Cardoso
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Neocrinus decorus
© 1997 Charles G. Messing
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Phaeognathus hubrichti
© 1996 Greg Sievert
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Phyllotis xanthopygus vaccarum
© 1996 Scott J. Steppan
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Xyliphius
© John P. Friel
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Proganochelys
© 1987 American Museum of Natural History
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Phyllotis darwini
© Scott J. Steppan
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Myctophidae
© 1996 M.L.J. Stiassny
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Bunocephalus coracoideus
© 1995 John P. Friel
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Loxodontomys micropus
© Scott J. Steppan
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Noctilionoidea
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Dicamptodontidae
© 1996 Kevin de Queiroz
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Sacabambaspis
© 1997 Philippe Janvier
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Hyla regilla
© 1995 David Cannatella
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Physalaemus centralis
© 1996 Adao Cardoso
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Cynomys ludovicianus
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Gymnocorymbus ternetzi
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Seymouria baylorensis
© 1939 The President and Fellows of Harvard College
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Andinomys edax
© Scott J. Steppan
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Phyllotis
© Scott J. Steppan
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Rhipidomys nitela
© 1996 Darrin Lunde
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