Streblotrypa

Diagnosis. Ramose colonies with indistinct bundle of about 10 or fewer axial zooecia in the endozone. Autozooecia budding from axial bundle, having long inflated proximal parts, rounded-polygonal in transverse section in the endozone, bending abruptly at the transition between endo- and exozone. Autozooecial apertures rounded to oval. Diaphragms rare. Hemisepta usually present. Metazooecia usually restricted to rows between the autozooecial apertures; styles usually lacking but poorly developed acanthostyles sometimes occurring. Autozooecial walls laminated, without distinct autozooecial boundaries.

Remarks. Streblotrypa (Streblotrypa) Vine, 1885, differs from S. (Streblascopora) Bassler, 1929, by an indistinctly defined axial bundle of axial zooecia and well-developed hemisepta. Occurrence. Carboniferous to Permian; worldwide.

Type species. Streblotrypa nicklesi Vine, 1885, by original designation. Late Mississippian (Middle Carboniferous; Pendleian = Serpukhovian); Hurst, north Yorkshire, England.