Canu, F.; Bassler, R. S. (1920). North American early Tertiary Bryozoa. <em>United States National Museum Bulletin.</em> 106: 1-879. (2 vols.)., available online athttps://www.biodiversitylibrary.org/page/946782 page(s): 761 [details]
original descriptionCanu, F.; Bassler, R. S. (1920). North American early Tertiary Bryozoa. <em>United States National Museum Bulletin.</em> 106: 1-879. (2 vols.)., available online athttps://www.biodiversitylibrary.org/page/946782 page(s): 761 [details]