Classification of the genus Attenosaurus
G. †Attenosaurus Aldrich and Jones 1930
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†Attenosaurus jonesii Aldrich and Jones 1930
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Invalid names: Hydromeda fimbriata Aldrich and Jones 1930 [synonym]
†Attenosaurus subulensis Aldrich 1930
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Invalid names: Attenosaurus indistinctus Aldrich and Jones 1930 [synonym]
Invalid names: Hydromeda Aldrich and Jones 1930 [synonym]