Domatoceras

Domatoceras is a nautiloid genus and member of the Grypoceratidae from the Pennsylvanian and Permian with a wide spread distribution.

Domatoceras Temporal range: Pennsylvanian–Permian PreꞒ Ꞓ O S D C P T J K Pg N
Domatoceras umbilicatum
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	Nautiloidea
Order:	Nautilida
Family:	†Grypoceratidae
Genus:	†Domatoceras Hyatt, 1891
Species
Domatoceras atypicum Shimansky, 1965 Domatoceras collinsvillense Niko & Mapes, 2016 Domatoceras fredericksi Kruglov, 1928 Domatoceras gardi Murphy Domatoceras gigas Domatoceras guangxiense Zhao & al., 1978 Domatoceras hexagonum Domatoceras highlandense Domatoceras hunicum Domatoceras inostranzewi Domatoceras kleihegei Domatoceras latum Shimanskiy, 1967 Domatoceras magister Shimanskiy, 1967 Domatoceras mattoonense Tucker, 1976 Domatoceras moorei Miller, Dunbar, & Condra Domatoceras mosquense Domatoceras northropi Miller & Unklesbay Domatoceras ogatsuense Ehiro & Takizawa, 1989 Domatoceras parallelum Domatoceras podolskense Domatoceras texanum Tucker & Mapes, 1978 Domatoceras tulense Domatoceras umbilicatus Hyatt Domatoceras walteri Miller & Unklesbay, 1942 Domatoceras wortheni Tucker, 1976

The shell of Domatoceras is evolute, coiled with whorls touching but not overlapping, some growing to be moderately large. Whorl section subquadrate, higher than wide. Sides essentially straight to slightly bowed and slightly convergent on a broad slightly arched venter on the outer rim. Shoulder are narrow but rounded. Chambers are short but lengthen slightly before the mature living chamber, septa close spaced, sutures form broad shallow lateral and ventral lobes and sharp ventro-lateral saddles. The dorsum in slightly impressed (indented) where it rides over the previous whorl. The siphuncle is subventral, located between the center and the ventral margin and, where known, slightly expanded so as to be longitudinally spindle shaped.