Lawrenceoceras

Lawrenceoceras is a genus of moderately curved, gently expanding bassleroceratids (Nautiloidia, Ellesmerocerida) from the Lower Ordovician of eastern North America. Septa dividing the chambers are close spaced; sutures straight, transverse; the siphuncle narrow, submarginal.

Lawrenceoceras
Temporal range: Early Ordovician
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Nautiloidea
Order:
Ellesmerocerida
Family:
Bassleroceratidae
Genus:
Lawrenceoceras

Ulrich et al., 1944

Lawrenceoceras is closely related to nautiloids such as Bassleroceras that gave rise to the Tarphycerida although it specifically may not be ancestral.

References
    • W.M.Furnish & Brian F. Glenister, 1964. Nautiloidea - Ellesmerocerida; Treatise on Invertebrate Paleontology, Part K. Geological Society of America.
    • Lawrenceoceras in Fossilworks


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