Pterotrigonia
Pterorigonia is an extinct genus of saltwater clams, marine bivalve molluscs in the family Megatrigoniidae. This genus is known in the fossil record from the Jurassic period Tithonian age to the Cretaceous period Maastrichtian age. Species in this genus were facultatively mobile infaunal suspension feeders. The type species of the genus is Pterotrigonia cristata.
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| Fossil Pterotrigonia caudata (Agassiz 1840) from the Isle of Wight at Galerie de paléontologie et d'anatomie comparée, Paris | |
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| Superfamily: | Megatrigonioidea |
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| Subfamily: | Pterotrigoniinae |
| Genus: | Pterotrigonia van Hoepen 1929 |
Pterotrigonia thoracica, was selected as the state fossil of Tennessee in 1998.
Distribution
Fossils of species within this genus have been found in the Jurassic of Antarctica, Chile and India, as well as in the Cretaceous of Angola, Antarctica, Argentina, Austria, Chile, Colombia, Cuba, Ecuador, Egypt, France, Hungary, Italy, Japan, Libya, Madagascar, Mexico, Mozambique, New Zealand, Oman, Peru, Portugal, Serbia and Montenegro, South Africa, Spain, Trinidad and Tobago, Russia, Ukraine, United Arab Emirates, United Kingdom, United States and Yemen.