Martinectes
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Martinectes is an extinct genus of polycotylid plesiosaur from the Late Cretaceous of North America and possibly European Russia. The genus contains a single species M. bonneri, known from multiple sk
Martinectes UMMNH
Placochelys BW
Nothosaurus BW
Leptocleidus BW
Pierre Shale
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The Pierre Shale is a geologic formation or series in the Upper Cretaceous which occurs east of the Rocky Mountains in the Great Plains, from Pembina Valley in Canada to New Mexico.
Martinectes
…measuring at least around 5 metres (16 ft) long. Two very large specimens of a polycotylid plesiosaur (KUVP 40001 and 40002) were collected from the Pierre Shale of Wyoming and later reported on by Adams in her 1997 Masters thesis, and in the same year, she officially described the specimens as a new species of…
A broken concretion with fossils inside; Late Cretaceous Pierre Shale near Ekalaka, Montana
Baculites from the Pierre Shale showing sutures and remnant aragonite; western South Dakota, Late Cretaceous.
Hesperornis BW
Ichthyornis restoration