Hemitrypa is an extinct genus of bryozoans that lived from the Devonian to the Permian period, belonging to the family Fenestellidae.[1] Like some other fenestrate bryozoans, it produced a skeletal superstructure to protect the colony.[2]
References
^Andres, Juan Luis Suarez; Ernst, Andrej (2015). "Lower–Middle Devonian Fenestellidae (Bryozoa) of NW Spain: implications for fenestrate palaeobiogeography". Facies. 61.
^Ernst, Andrej (2012). "Diversity dynamics and evolutionary patterns of Devonian Bryozoa". Palaeobiodiversity and Palaeoenvironments. 93.