Ptychites
Ptychites is an extinct genus of cephalopods belonging to the family Ptychitidae. These nektonic carnivores lived during the Triassic period, from Anisian to Ladinian age.
Species
Ptychites besnosovi Shevyrev 1995Ptychites densistriatus Bucher 1992Ptychites domatus Silberling and Tozer 1968Ptychites evansi Smith 1914Ptychites gradinarui Bucher 1992Ptychites guloensis Tozer 1994Ptychites hamatus Tozer 1994Ptychites miyagiensis Bando 1964Ptychites nipponicus Bando 1964Ptychites oppeli Mojsisovic 1882Ptychites opulentus Mojsisovics 1882Ptychites pseudoeuglyphus Konstantinov 1991Ptychites stachei Mojsisovics 1882Ptychites trochleaeformis Lindstroem 1865Ptychites wrighti McLearn 1946
Description
Species in this genus are quite variable in form, ranging from subglobose to laterally compressed. The surface of the shell is sculptured with low folds.
Distribution
Fossils of species within this genus have been found in the Triassic of Afghanistan, Austria, Canada, China, Hungary, Italy, Japan, Malaysia, Oman, Papua New Guinea, Russia, Tunisia, Turkey, United States.