Orbignyella Ulrich & Bassler, 1904

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 : 572

publication ID	https://doi.org/ 10.5252/geodiversitas2022v44a20
publication LSID	urn:lsid:zoobank.org:pub:5EC74771-0B7B-494D-ADC8-79BECD097A3A
DOI	https://doi.org/10.5281/zenodo.6723055
persistent identifier	https://treatment.plazi.org/id/865C87FD-FFA9-FFEB-3AEA-FCA04F5FFA82
treatment provided by	Admin
scientific name	Orbignyella Ulrich & Bassler, 1904
status

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Genus Orbignyella Ulrich & Bassler, 1904 View in CoL

TYPE SPECIES. — Orbignyella sublamellosa Ulrich & Bassler, 1904 View in CoL by original designation. Middle Ordovician; United States.

DIAGNOSIS. — Colonies encrusting, massive or globular. Prismatic autozooecia with polygonal apertures. Autozooecial diaphragms abundant, straight or inclined, often cystoid. Exilazooecia rare, short, with or without diaphragms. Acanthostyles small or large, varying in number. Autozooecial walls thin or weakly irregularly thickened, with indistinct laminated microstructure, often serrated.

OCCURRENCE. — Ordovician – Silurian; worldwide.

COMPARISON

Orbignyella Ulrich & Bassler, 1904 differs from Cyphotrypa Ulrich & Bassler, 1904 in having of abundant and inclined diaphragms.