Basis of record:
United States National Museum
Neotype selected by Woodring, Bramlette & Kew (1946: 77, Pl. 35 fig. 22).
San Pedro, east side of 48-foot mesa, 1,000 feet southeast of intersection of Harbor Blvd. and Pacific Electric tracks. (Arnold's lumber yard locality; now inaccessible). Palos Verdes sand [Pleistocene]