Bryozoan

Taxonomy

branching bryozoan

Kingdom: Animalia
Phylum: Bryozoa
Class: Stenolaemata
Order: Cystoporata
Family: Hexagonellidae
Genus: Prismopora
Species: Prismopora triangulata
Author Citation (White 1878)

Geological Time Scale

Eon: Phanerozoic
Era: Paleozoic
Period: Carboniferous
Sub Period: Pennsylvanian
Epoch: Middle
International Age: Desmoinesian

Stratigraphy

Deese Group
Deese Formation

Provenance

Collector: Bob Williams
Date Collected: 04/30/2023
Acquired by: Field Collection

Dimensions

Length: 16 mm
Width: 5 mm

Location

private property
Carter County
Oklahoma
United States

• desmoinesian
• oklahoma
• pennsylvanian

Comments

Triangular or "y" shaped cross-section with bifurcating branches. Zooecia radiate out from center.

 

Stratigraphy: there is uncertainty over whether "Deese" should have Group or Formation status. 

 

Systematics: This is Prismopora triangulata (White 1878), not Prismopora triangulata Kiseleva 1973 (a Russian Permian form). These are presumably different species and homonyms and it's unclear whether either is taxonomically valid as White's description has no illustrations or type material. 

Prismopora triangulata (White) has been used in geological survey faunal lists but apparently without formal revision. 

White's description under the genus Ptilodyctia (usually Ptilodictyia)  in: 

White, C.A. (1878) Descriptions of new species of invertebrate fossils from the Carboniferous and Upper Silurian rocks of Illinois and Indiana. Proceedings of the Academy of Natural Sciences of Philadelphia, 30, 1878, 29-37.