Bivalvia - Cardiida - Mactridae
Synonym: Schizothaerus Conrad 1853
Parent taxon: Lutrariinae according to E. J. Moore 2003
See also Abbott 1974 and Sepkoski 2002
Sister taxa: Heterocardia, Lutraria, Lutromactra, Meropesta
Subtaxa: Schizothaerus trapezoides Tresus capax Tresus nuttallii Tresus pajaroanus Tresus saxadomoides
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Quaternary of Japan (2 collections), Mexico (7), United States (57: California, Washington)
• Pliocene to Pleistocene of United States (3: California)
• Pliocene of United States (25: California, Oregon)
• Miocene to Pliocene of United States (11: California)
• Miocene of United States (7: California)
• Oligocene of United States (3: Alaska, California)
Total: 115 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.