Homotrypa is an extinct genus of bryozoans from the Ordovician and Silurian periods, known from fossils found in the United States. Its colonies are branch-like and have small monticules made of groups of three or four larger zooecia slightly protruding out from the main surface of the colony.[2][3] In cross section, the zooecia (tubes housing individual zooids) are erect in axis and gently curve toward the surface of the colony.[4]
Species
Homotrypa curvata (Ulrich, 1882)
Homotrypa niagarensis (Ernst, Brett and Wilson, 2019)[5]
^Bork, Kennard B.; Perry, T.G. (1968). "Bryozoa (Ectoprocta) of Champlainian Age (Middle Ordovician) from Northwestern Illinois and Adjacent Parts of Iowa and Wisconsin. Part III. Homotrypa, Orbignyella, Prasopora, Monticulipora, and Cyphotrypa". Journal of Paleontology. 42 (4): 1042–1065.
^Ernst, Andrej; Brett, Carlton E.; Wilson, Mark A. (2019). "Bryozoan fauna from the Reynales Formation (lower Silurian, Aeronian) of New York, USA". Journal of Paleontology. 93 (4): 628–657. Bibcode:2019JPal...93..628E. doi:10.1017/jpa.2018.101. S2CID135188343.