To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
Languages
Recent
Show all languages
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

From Wikipedia, the free encyclopedia

Pterotrigonia
Temporal range: from Jurassic to Cretaceous, 164.7–66.043 Ma
Fossil Pterotrigonia caudata (Agassiz 1840) from the Isle of Wight at Galerie de paléontologie et d'anatomie comparée, Paris
Scientific classification
Kingdom:
Phylum:
Class:
Order:
Superfamily:
Megatrigonioidea
Family:
Subfamily:
Pterotrigoniinae
Genus:
Pterotrigonia

van Hoepen 1929

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]

YouTube Encyclopedic

  • 1/1
    Views:
    829
  • State Symbols Series - Tennessee

Transcription

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

  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. Retrieved 25 October 2021.
  2. ^ Leanza, H.A. (1996). "Jurassic trigoniaceans from Argentina: A review" (PDF). Georesearch Forum. 1: 67–78. Retrieved 25 October 2021.


This page was last edited on 25 February 2024, at 21:04
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.