Dyscritella, Girty, 1911

Ernst, Andrej, 2016, Bryozoan fauna from the Permian (Artinskian-Kungurian) Zhongba Formation of southwestern Tibet, Palaeontologia Electronica (1946) 51 (9), pp. 1-59 : 23

Genus DYSCRITELLA Girty, 1911

Type species. Dyscritella robusta Girty, 1911 . Lower Carboniferous ; Arkansas, USA .

Diagnosis. Dendroid and encrusting colony with abundant acanthostyles and exilazooecia. Autozooecia parallel to longitudinal direction of the colony in endozone; gradually bending outward in exozone. Diaphragms in autozooecia lacking or very rare; lacking in exilazooecia. Exilazooecia circular to angular in cross section and separated from the autozooecia and from each other by thick walls. Two sizes of acanthostyles may be present. Zooecial walls thin in endozone, rapidly thickening in the exozone (modified after Ernst and Gorgij, 2013).

Remarks. Dyscritella Girty, 1911 generally lacks diaphragms which are commonly developed in the similar genus Dyscritellina Morozova in Dunaeva and Morozova, 1967.

Occurrence. Devonian to Triassic; worldwide.