Genus RHOMBOPORA Meek, 1872

[= Shishoviclema Gorjunova, 1985]

Type species. Rhombopora lepidodendroides Meek, 1872, by original designation. Pennsylvanian (Upper Carboniferous), North America .

Diagnosis. Ramose colonies. Autozooecia with oval apertures and regularly thickened walls in the exozone, intersecting the colony surface at low angles. Diaphragms present in exozone. One or two acanthostyles located on the distal end of each aperture. Abundant aktinotostyles arranged in a regular pattern around the apertures. Metazooecia few to absent. Exozonal walls thick, laminated.

Remarks. Rhombopora Meek, 1872, differs from Megacanthopora Moore, 1929, in having fewer metazooecia. Rhombopora Meek, 1872, differs from Primorella Romantchuk and Kiseleva, 1968, through the presence of acanthostyles.

Occurrence. Devonian – Permian; worldwide.