Bivalvia - Cardiida - Mactridae
Alternative combination: Spisula aequilateralis
Full reference: C. A. Waring. 1917. Stratigraphic and faunal relations of the Martinez to the Chico and Tejon of Southern California. Proceedings of the California Academy of Sciences 7(4):41-124
Belongs to Mactromeris according to A. J. W. Hendy 2020
See also Moore 2003 and Waring 1917
Sister taxa: Mactromeris abbotti, Mactromeris acutirostrata, Mactromeris albaria, Mactromeris beali, Mactromeris bisculpturata, Mactromeris brevirostrata, Mactromeris capayana, Mactromeris catilliformis, Mactromeris coalingensis, Mactromeris eugenensis, Mactromeris gaviotaensis, Mactromeris hannibali, Mactromeris hemphillii, Mactromeris markleyensis, Mactromeris mercedensis, Mactromeris merriami, Mactromeris montereyana, Mactromeris mossbeachensis, Mactromeris muliniaformis, Mactromeris occidentalis, Mactromeris pittsburgensis, Mactromeris polynyma, Mactromeris ramonensis, Mactromeris rushi, Mactromeris sectoris, Mactromeris sisquocensis, Mactromeris subquadrata, Mactromeris tejonensis, Mactromeris tenuissima, Mactromeris trampasensis, Mactromeris voyi, Mactromeris weaveri
Type specimen: LSJU 154, a shell. Its type locality is Southwest of Santa Susana, which is in a Danian transition zone/lower shoreface sandstone in the Las Virgenes Formation of California.
Distribution:
• Pliocene of New Zealand (1 collection)
• Paleocene of the Russian Federation (1), United States (1: California)
Total: 3 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.