Bivalvia - Cardiida - Mactridae
Synonym: Schizothaerus Conrad 1853
Parent taxon: Lutrariinae according to J. H. Signorelli 2019
See also Abbott 1974, Moore 2003 and Sepkoski 2002
Sister taxa: Heterocardia, Lutraria, Lutromactra, Meropesta
Subtaxa: Schizothaerus trapezoides Tresus allomyax Tresus capax Tresus nuttallii Tresus pajaroanus Tresus saxadomoides
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Quaternary of Japan (2 collections), Mexico (7), United States (82: California, Washington)
• Pliocene to Pleistocene of United States (3: California)
• Pliocene of United States (35: California, Oregon)
• Miocene to Pliocene of United States (11: California)
• Miocene of Argentina (3), United States (13: California)
• Oligocene of United States (3: Alaska, California)
Total: 159 collections including 160 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.