Upper Jurassic Period

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Rhamphorhynchus jessoni

Rhamphorhynchus (beak jaw) jessoni (after Jesson)
Fragmentary remains of wing bones and joints.  Oxfordian, Oxford Clay, St. Ives, England.  Other fragments from East Africa are also associated with this type.

Lydekker R. 1890, On Ornithosaurian remains from the Oxford Clay of Huntingdonshire. Q. J. geol. Soc. 46, 429–431.