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 |
 | Ectoproct and entoproct type material: re-examination of species from New England and Bermuda named by A. E. Verrill, J. W. Dawson and E. Desor (1968) Postilla 120: 1-95 |
 | A nomenclatural index to 'A history of the British Marine Polyzoa' by T.Hincks (1880) J S Ryland (1969) Bulletin of the British Museum (Natural History) 17: 207-260 |