Orthopora Hall, 1886

Ernst, Andrej, Fernández, Luis Pedro, Fernández-Martínez, Esperanza & Vera, Carmen, 2012, Description of a bryozoan fauna from mud mounds of the Lebanza Formation (Lower Devonian) in the Arauz area (Pisuerga-Carrión Province, Cantabrian Zone, NW Spain), Geodiversitas 34 (4), pp. 693-738 : 716

Genus Orthopora Hall, 1886

TYPE SPECIES. — Trematopora regularis Hall, 1874 , by subsequent designation ( Hall 1886). Lower Devonian ; USA.

OCCURRENCE. — Silurian to Carboniferous of North America, Europe andChina, Middle Permian of Oman.

DIAGNOSIS. — Branched colonies. Autozooecia short, budding from more or less distinct medial axis in spiral order. Autozooecial diaphragms rare to absent. Both superior and inferior hemisepta commonly present; sometimes double hemisepta occurring; rarely hemisepta absent. Autozooecial apertures oval, arranged regularly in alternating rows on the colony surface. Walls granular in the endozone; laminated in exozone. Paurostyles abundant, prominent. Acanthostyles present, less abundant than paurostyles. Heterozooecia absent.

COMPARISON

Orthopora Hall, 1886 differs from Trematella Hall, 1886 in lacking metazooecia and in the presence of well developed hemisepta.