Trochonema

Trochonema Temporal range: Darriwilian–Changhsingian PreꞒ Ꞓ O S D C P T J K Pg N
Trochonema sp. from the middle Ordovician of the Galena Limestone of Minnesota
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Family:	† Trochonematidae
Genus:	† Trochonema Salter, 1859

Trochonema is an extinct genus of early marine snail from the Paleozoic, which lasted almost 215 million years. ^[1] It was first described by John William Salter in 1859. ^[2] Like many genera in the order Murchisoniina, the relationship between it and other large gastropod clades is uncertain.

References

1. "Trochonematidae". Ordovician atlas of ancient life. 7 January 2014. Retrieved July 14, 2022.
2. Billings, E.; Hall, James; Jones, T. Rupert; Salter, John William; Thompson, John Vaughan; Canada, Geological Survey of (1858). Figures and descriptions of Canadian organic remains. Montreal: Printed by J. Lovell.