Xipheroceras sp.
 
Xipheroceras sp. Buckman 1911
Charmouth, Dorset Coast.
 
Family EODEROCERATIDAE Spath 1929
 
Found within the Asteroceras obtusum zone of the Upper Sinemurian substage
 
Inner and middle whorls with strong ribs and large distint outer spines. Outer whorls with simple closer ribs. Size 4cm.
 
Some workers concider this to be the female of promicroceras.
 
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