Pinnatopora

Diagnosis. Colonies consisting of straight main branches with frequent lateral branches (pinnate); two rows of autozooecia both on main and lateral branches; autozooecia rectangular to pentagonal or trapezoid in mid-tangential section; hemisepta absent; superstructure absent; keel low with or without nodes.

Remarks. Penniretepora d`Orbigny, 1849, differs from Filites Počta in Barrande, 1894, in the shape of zooecia in mid-tangential section (rectangular to pentagonal or trapezoid vs. triangular in Filites). Penniretepora differs from Gorjunopora Ernst et al., 2015, in absence of hemisepta. The genus Penniretepora d`Orbigny, 1849, needs critical re-evaluation. Many species were placed to Penniretepora because of their pinnate shape and two rows of zooecia on the branches. However, they have different internal morphology (shape of autozooecial chambers and presence / absence of hemisepta). Moreover, many such species were described without use of thin sections, therefore their internal morphology is unknown. Occurrence. Devonian to Permian; worldwide.

Type species. Retepora pluma Phillips, 1836, subsequently designated by d`Orbigny (1849). Mississippian; Yorkshire, England.