Cystodictyonidae Ulrich, 1884

Ernst, Andrej & Minwegen, Elke, 2006, Late Carboniferous bryozoans from La Hermida, Spain, Acta Palaeontologica Polonica 51 (3), pp. 569-588 : 571-573

Family Cystodictyonidae Ulrich, 1884 Genus Cystodictya Ulrich, 1882

Type species: C. ocellata Ulrich, 1882 , by original designation; Lower Mississippian , Kentucky, USA .

Diagnosis.—Bifoliate colony, branching in plane of mesotheca. Ridges between autozooecial rows lacking. Mesotheca thin to moderately thick, with low ridges parallel to ranges of autozooecia. Autozooecia with peristomes and lunaria, basally teardrop−shaped, quadrate in cross−section; partly isolated by vesicles; recumbent portion short; blunt proximolateral hemisepta at zooecial bend, indenting zooecial cavity and producing slight hook−shaped appearance of autozooecia in the deep tangential section. Diaphragms lacking. Walls laminated; boundary serrated. Vesicles small, boxlike (after Utgaard 1983).

Remarks.— Cystodictya Ulrich, 1882 differs from the similar Sulcoretepora d’Orbigny, 1849 in the presence of hemisepta but absence of diaphragms.

Stratigraphic and geographic range.—Middle Devonian to Lower Permian; worldwide.