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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
Order:	Murchisoniina
Superfamily:	Trochonematoidea
Family:	Trochonematidae
Genus:	Trochonema Salter, 1859

Trochonema is an extinct genus of early marine snail from the Paleozoic, which lasted almost 215 million years. It was first described by John William Salter in 1859. 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.

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