BioStor
 | An annotated list of the shells of San Pedro Bay and vicinity Mrs M Burton Williamson and W H Dall (1892) Proceedings of The United States National Museum 15: 179-220 |
 | Expedition to Guadalupe Island, Mexico, in 1922 — No.4 Molluscan fauna of the Pleistocene of San Quintin Bay, Lower California Eric Knight Jordan (1926) Proceedings of the California Academy of Sciences 15: 241-255 |
 | The marine mollusks and brachiopods of Monterey Bay,California, and vicinity Allyn Goodwin Smith and Mackenzie Gordon Jr. (1948) Proceedings of the California Academy of Sciences 26: 147-245 |