Euchasma Billings 1865 (mollusk)

Rostroconchia - Conocardiida - Eopteriidae

Synonym: Euchasmella Kobayashi 1933

Full reference: E. Billings. 1865. Palaeozoic fossils, volume 1. Geological Survey of Canada 1-426

Parent taxon: Eopteriidae according to J. Pojeta and B. Runnegar 1976

See also Bouchet et al. 2010, Pojeta et al. 1972, Sepkoski 2002 and Wagner 2023

Sister taxa: Eopteria, Pseudoeuchasma, Talacastella, Wanwanella

Subtaxa: Euchasma blumenbachi Euchasma caseyi Euchasma colliveri Euchasma eopteriformis Euchasma jonesi Euchasma multistriata Euchasma mytiliforme Euchasma swarkoi

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Type: Conocardium blumenbachium

Ecology: stationary semi-infaunal suspension feeder

Distribution:

• Ordovician of Australia (18 collections), Canada (1: Newfoundland), Malaysia (4), Norway (1), South Korea (1), the United Kingdom (3)

• Castlemainian of Australia (2)

• Cassinian of Canada (11: Newfoundland, Newfoundland and Labrador, Quebec), United States (2: Virginia)

• Jeffersonian of Canada (2: Newfoundland, Newfoundland and Labrador)

• Cambrian of Australia (1)

Total: 46 collections including 47 occurrences

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Specimen images are retrieved through the ePANDDA API.


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