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Euchasma
Taxonomy
Euchasma was named by Billings (1865) [Sepkoski's age data: Cm Dres O Llvi-l Sepkoski's reference number: 16,281]. It is not extant. Its type is Conocardium blumenbachium.
It was assigned to Rostroconchia by Pojeta et al. (1972); to Eopteriidae by Pojeta and Runnegar (1976); to Conocardioida by Sepkoski (2002); and to Euchasmidae by Bouchet et al. (2010).
It was assigned to Rostroconchia by Pojeta et al. (1972); to Eopteriidae by Pojeta and Runnegar (1976); to Conocardioida by Sepkoski (2002); and to Euchasmidae by Bouchet et al. (2010).