BioStor
 | North American later Tertiary and Quaternary Bryozoa F Canu, and R S Bassler (1923) United States National Museum Bulletin 125: 1-302 |
 | Bryozoa of the Pacific Coast of America. Part 2, Cheilostomata Ascophora Raymond C Osburn (1952) Allan Hancock Pacific Expedition 14: 1-611 |
 | Fossil Bryozoa from the Pleistocene of Southern California J D Soule and M M Duff (1957) Proc. Calif. Acad. Sci. (4) 29: 87-146 |