Aviculopecten Temporal range: | |
---|---|
A. subcardiformis from the Logan Formation (Lower Carboniferous) of Wooster, Ohio (external mold) | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Bivalvia |
Order: | Pectinida |
Family: | † Aviculopectinidae |
Genus: | † Aviculopecten M'Coy, 1851 |
Type species | |
Aviculopecten planoradiatus | |
Species | |
See text |
Aviculopecten is an extinct genus of bivalve mollusc that lived from the Early Devonian to the Late Triassic in Asia, Australia, Europe, North America, and South America. [1]
A fine fossil of the species A. subcardiformis has been found in the 345 million year old Logan Formation of Wooster, Ohio. It is an external mould and the impression left by the valve is so clear that the fine ridges and even the growth lines are visible. [2]
The following species of Aviculopecten have been described: [1]
Rousseau Hayner Flower (1913–1988) was an extremely prolific 20th century paleontologist, known for his eccentric personality.
Atrypa is a genus of brachiopod with round to short egg-shaped shells covered with many fine radial ridges. Growth lines form perpendicular to the costae and are spaced approximately 2 to 3 times further apart than the costae.. The pedunculate valve is slightly convex, but oftentimes levels out or becomes slightly concave toward the anterior margin. The brachial valve is highly convex. Neither valve contains an interarea. Atrypa had a large geographic range and occurred from the late Lower Silurian (Telychian) to the early Upper Devonian (Frasnian). Other sources expand the range from the Late Ordovician to Carboniferous, approximately from 449 to 336 Ma. A proposed new species, A. harrisi, was found in the trilobite-rich Floresta Formation in Boyacá, Colombia.
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The Logan Formation is the name given to a Lower Carboniferous siltstone, sandstone and conglomeratic unit exposed in east-central Ohio and parts of western West Virginia, USA.
The Devonian Jeffersonville Limestone is a mapped bedrock unit in Indiana and Kentucky. It is highly fossiliferous.
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Lytoceras is an ammonite genus that was extant during most of the Jurassic and Cretaceous periods, and is the type genus for the family Lytoceratidae. These cephalopods were fast-moving nektonic carnivores.