Arctogymnites is an ammonoid cephalopod from the middle Triassic included in the ceratitid subfamily Beyrichitinae. Related genera include Beyrichites

Beyrichites

Beyrichites is an extinct genus in the ammonoid cephalopod, order Ceratitida from the Lower and Middle Triassic of southern Europe, Asia, and western North America....

, Frechites

Frechites

Frechites is an early Triassic ammonite, a kind of cephalopod with an external shell, included in the ceratitid family Beyrichitidae.-Taxonomic revision:...

, Gymnotoceras, and Salterites

The Treatise Part L, 1957 separates the beyrichitids (Beyrichidae) as an independent family in the Ceratitaceae

Ceratitaceae

The Ceratitaceae is a superfamily in the ammonoid cephalopod order Ceratitida characterised in general by highly ornamented or tuberculate shells with ceratitic sutures that may become goniatitic or ammonitic s some offshoots....

, separate from the Ceratitidae. Later (Tozer 1981) they were incorporated into the Ceratitidae as a subfamily.

References

• Arkell et al. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L, Ammonoidea. Geol Soc of America and Univ Kansas press. R. C. Moore (Ed) -- Ceratitaceae, pp L147 -L158
• Classification of E. T. Tozer 1981