Pachyceras Explained

Pachyceras is a genus of perisphinctoid ammonites from the Middle Jurassic, upper Callovian stage, and is the type genus for the family Pachyceratidae. The shell is involute, subglobular, with a deep umbilicus and flattened flanks that slope toward a more narrowly rounded venter, and covered by low, widely spaced ribs.

Distribution

Jurassic deposits of Egypt, France, India, Saudi Arabia and Switzerland.^[1]

References

• D. T. Donovan, J. H. Callomon and M. K. Howarth 1981. Classification of the Jurassic Ammonitina; The Ammonoidea. The Systematics Association special volume no. 18

Notes and References

1. https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=15306 Paleobiology Database - Pachyceras