Pseudostictoporella Ross, 1970

Ernst, Andrej & Carrera, Marcelo G., 2022, A cool-water bryozoan association from the La Pola Formation (Sandbian, Ordovician) of Argentine Precordillera, Geodiversitas 44 (20), pp. 563-601 : 588

Genus Pseudostictoporella Ross, 1970

TYPE SPECIES. — Pseudostictoporella typicalis Ross, 1970 by original designation. Rockland Formation, Selby Member ( P. bicornis Biozone ), Sandbian, Ordovician; Ontario, Canada and New York, United States.

DIAGNOSIS. — Colonies bifoliate, bifurcating. Autozooecia subelliptical in cross section in the endozone; irregularly hexagonal in cross section in exozone; partly separated by exilazooecia. Autozooecial diaphragms rare to absent. Hemisepta absent. Pustules common along autozooecial boundaries, scattered in exozonal walls. Metazooecia polygonal to irregularly subcircular, arranged in groups, singly or in short rows. Monticules common, generally flat; consisting of metazooecia, few autozooecia and some skeletal material.

OCCURRENCE. — Sandbian, Upper Ordovician; Canada, United States, Argentina.

COMPARISON

The genus Pseudostictoporella Ross, 1970 differs from the genus Stictoporella Ulrich 1882 by the absence of hemisepta, from the genera Oanduella Männil, 1958 and Stictoporellina Nekhoroshev, 1956 – by bifurcating colony shape instead of reticulate one in the latter genera.