Streblotrypa, Vine, 1885

Ernst, Andrej, 2016, Bryozoan fauna from the Permian (Artinskian-Kungurian) Zhongba Formation of southwestern Tibet, Palaeontologia Electronica (1946) 51 (9), pp. 1-59 : 27

Genus STREBLOTRYPA Vine, 1885 Sub-genus STREBLOTRYPA (STREBLOTRYPA) Vine, 1885

Type species. Streblotrypa nicklesi Vine, 1885 . Middle Carboniferous; England.

Diagnosis. Branched colonies. 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 possessing an indistinctly defined axial bundle of 10 or less axial zooecia. Streblotrypa (Streblotrypa) differs from Hyphasmopora Etheridge, 1875 by the presence of an axial bundle and having a wall structure without distinct autozooecial boundaries.

Occurrence. Carboniferous to Permian; worldwide.