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Ophiceras
''Ophiceras'' is a smooth, evolute ceratitid ammonite from the Lower Triassic, with a rounded venter. ==Diagnosis== The shell of ''Ophiceras'' evolute, whorls all showing, slowly increasing in height, and slightly embracing the previous. Umbilicus, wide and moderately deep. Surface ornamented with faint folds, which in some develop into coarse ribs in the mature growth stage, and transverse striae. Suture is ceratitic, lobes and saddles usually long and narrow. (Smith, 1932. Arkell, 1957)
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