The ectoproct (Bryozoan) genus Actinotrypa Ulrich
Alan Stanley Horowitz
Restudy of the syntypes and other specimens indicates that the Mississippian ectoproct species Actinotrypa peculiaris (Rominger), the type species of Actinotrypa Ulrich, belongs in the suborder Fistuliporoidea of the order Cystoporata because it contains a bilaminate mesotheca and interzooecial vesicular structure. The family Actinotrypidae should be retained for Actinotrypa. Only the type species is assigned to Actinotrypa. A.? sera Girty from Permian strata of west Texas is an unidentifiable fistuliporoid and does not gelong to Actinotrypa. Actinotrypa was probably a form that was specialized for living on a bank edge where bidirectional currents, possibly tidally influenced, were common. It had only moderate success and was probably competing with other bilaminate genera for the same ecologic niche.
This record provided courtesy of AGI/GeoRef.
