Not stated, probably shallow water. [details]
Pacific coast of Mexico: southern Gulf of California (Canal de San Lorenzo, La Paz Bay). [details]
The species is named in honor of Marian H. Pettibone, ''for her great work on increasing the knowledge of ... [details]
San Lorenzo Channel, La Paz Bay, southern Gulf of California, Mexico (24.3864, -110.3156), in rocky substrate. [details]