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By Mainefossils
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Order: Ostreida
Family: Pterineidae
Genus: Actinopteria
Species: Actinopteria bella
Author Citation Williams, 1913
Eon: Phanerozoic
Era: Paleozoic
Period: Silurian
Sub Period: None
Epoch: Přídolí
Leighton Formation
Collector: Asher Michalski
Date Collected: 01/24/2021
Acquired by: Field Collection
Length: 10 mm
Width: 20 mm
Penobscot County
Maine
United States
Actinopteria bella is a species of bivalve found in the Leighton/Pembroke Fm, and first described by Henry S. Williams. It is differentiated from A. fornicata by less convexity in its shell and a wider beak. It is differentiated from A. dispar by its shorter shell.
The above pictures are of the left valve. A poorly preserved original or cast of the shell exterior is on the left side. Some of the exterior of the shell may be missing since the exterior ribs have less than normal height.
The right photo is an exterior impression or mold. Some of the shell may be present on the right side of the photo.
Williams, Henry Shaler (1913). "New species of Silurian fossils from the Edmunds and Pembroke Formations of Washington County, Maine." Proceedings U.S. National Museum, 45, 319-358.
https://repository.si.edu/bitstream/handle/10088/14399/1/USNMP-45_1985_1913.pdf
Maine Geological Survey (2009). Virtual Tour of Maine's Fossils. https://digitalmaine.com/cgi/viewcontent.cgi?article=1575&context=mgs_publications
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