Classification of Nicholls 1999

Cl. Reptilia Laurenti 1768 [reptile]
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Subcl. Diapsida Osborn 1903 [diapsid]
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Unr. †Thalattosauriformes Nicholls 1999
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G. †Askeptosaurus Nopcsa 1925
G. †Endennasaurus Renesto 1984
Or. †Thalattosauria Merriam 1905
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G. †Hescheleria Peyer 1936
Superfm. †Thalattosauroidea Nopcsa 1928
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G. †Nectosaurus Merriam 1905
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Nectosaurus halius Merriam 1905
Fm. †Thalattosauridae Merriam 1904
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G. †Clarazia Peyer 1936
Invalid names: Thalattosaurida Nicholls 1999 [empty]