Lawrenceoceras Ulrich, Foerste, Miller & Unklesbay 1944
- Dataset
- Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen - a pelagic fauna with Laurentian affinities
- Rank
- GENUS
Classification
- phylum
- Mollusca
- class
- Cephalopoda
- order
- Ellesmerocerida
- family
- Bassleroceratidae
- genus
- Lawrenceoceras
diagnosis
Diagnosis Smooth, slender, cyrtocones with elliptically depressed cross section. Sutures directly transverse, with very shallow, broad dorsal and ventral lobes. Siphuncle small, about 0.1 of conch diameter, on convex side of conch, almost marginal in position. Siphuncular segments cylindrical or nearly so (compiled from Ulrich et al. 1944).
type_taxon
Type species Lawrenceoceras collinsi Ulrich, Foerste, Miller & Unklesbay, 1944 from boulders at Point Levis, Levis County, Quebec, Canada (presumably late Floian); by original designation.