Bigotites

Bigotites is a middle Jurassic ammonite found in Europe included in the perisphictid subfamily Leptosphinctinae. Shells are essentially evolute with a deep umbilicus and whorls that overlap somewhat.

Bigotites petri is found in the UK in the Coombe Quarry at Mapperton with Vermisphinctes, Parkinsonia, Oxycerites and Strigoceras. . Another, Bigotites thevenini from the upper Bajocian of France, grew to at least 12,8cm (5.04in) in diameter and has primary ribs that arise on umbilical shoulder and divide on ventro-lateral shoulder, infilled by smaller ventral ribs.