Pterotrigonia Explained

Pterotrigonia 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.

Pterotrigonia thoracica was selected as the state fossil of Tennessee in 1998.

Scabrotrigonia is a subgenus of Pterotrigonia.^{[1] [2]}

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, Bulgaria, 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.

References

• Web site: Paleobiology Database . 17 December 2021 . 25 March 2022 . https://web.archive.org/web/20220325060448/http://www.fossilworks.org/cgi-bin/bridge.pl?action=home . dead .
• Sepkoski, Jack Web site: Sepkoski's Online Genus Database . 22 May 2014 . 8 February 2023 . https://web.archive.org/web/20230208233451/http://strata.geology.wisc.edu/jack/showgenera.php?taxon=261&rank=class . live .
• Web site: Pterotrigonia caudata. 22 May 2014. https://web.archive.org/web/20140522175511/http://zipcodezoo.com/Animals/P/Pterotrigonia_caudata/ . 25 July 2024. 22 May 2014 .

Notes and References

1. Tashiro . M . Matsuda . T. . 1983 . A study of the Pterotrigoniae from Japan . Memoirs of the Faculty of Science, Kochi University, Series e, Geology . 4 . 13–52 . 25 October 2021 . 25 October 2021 . https://web.archive.org/web/20211025172309/https://kochi.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2256&item_no=1&attribute_id=17&file_no=1 . live .
2. Leanza . H.A. . 1996 . Jurassic trigoniaceans from Argentina: A review . Georesearch Forum . 1 . 67–78 . 25 October 2021.