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By BobWill
branching bryozoan
Kingdom: Animalia
Eon: Phanerozoic
Era: Paleozoic
Period: Carboniferous
Sub Period: Pennsylvanian
Epoch: Middle
International Age: Desmoinesian
Deese Group
Deese Formation
Collector: Bob Williams
Date Collected: 04/30/2023
Acquired by: Field Collection
Length: 16 mm
Width: 5 mm
private property
Carter County
Oklahoma
United States
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.
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