• Source: Trigonia

Trigonia is an extinct genus of saltwater clams, fossil marine bivalve mollusk in the family Trigoniidae. The fossil range of the genus spans the Paleozoic, Mesozoic and Paleocene of the Cenozoic, from 298 to 56 Ma.




Description


The genus Trigonia is the most readily identifiable member of the family Trigoniidae, having a series of strong ribs or costae along the anterior part of the shell exterior. They are the first representatives of the family to appear in the Middle Triassic (Anisian) of Chile and New Zealand. The first European examples (Trigonia costata Parkinson) appear in the Lower Jurassic (Toarcian) of Sherborne, Dorset and Gundershofen, Switzerland.




Species


The following Trigonia species have been described:




Distribution


Fossils of Trigonia have been registered in:

Permian
Bolivia (Copacabana Formation)

Triassic
Austria, China, Italy, the Russian Federation, United States (Alaska, Idaho), and Vietnam.

Jurassic
Afghanistan, Argentina, Canada (Alberta, British Columbia, Yukon), Chile, Colombia (Valle Alto Formation, Caldas), Egypt, Ethiopia, France, Germany, Greenland, India, Iran, Japan, Kenya, Luxembourg, Madagascar, Morocco, New Zealand, Poland, Portugal, the Russian Federation, Saudi Arabia, Somalia, Spain, Tanzania, Thailand, Tunisia, the United Kingdom, United States (Alaska, California, Idaho, Montana, Nevada, Oregon, Texas, Utah, Wyoming), and Yemen.

Cretaceous
Afghanistan, Algeria, Antarctica, Argentina, Armenia, Australia, Brazil, Bulgaria, Canada (British Columbia), Chile, Colombia (Yuruma Formation, La Guajira, Macanal Formation, Eastern Ranges), Egypt, France, Germany, Greenland, Hungary, Italy, Lebanon, Mexico, the Netherlands, New Zealand, Papua New Guinea, Peru, Portugal, Serbia and Montenegro, South Africa, Spain, Switzerland, Tanzania, Turkmenistan, Russian Federation, Ukraine, the United Kingdom, United States (Arizona, California, Delaware, Mississippi, New Jersey, North Carolina, Tennessee, Texas), Venezuela, and Yemen.

Paleocene
Argentina (Cerro Dorotea Formation)




References






= Bibliography

=
Mojica, Jairo (1984), "An outline on the Jurassic in Colombia" (PDF), Geología Colombiana, 13: 129–136, retrieved 2017-03-31
Piraquive, Alejandro; Díaz, Juan Sebastián; Cuéllar, Tomas; Pardo, Germán; Kammer, Andreas (2011), "Reactivación Neógena de estructuras de rift del Cretácico Temprano asociadas con la Falla de Chámeza, Pajarito, Boyacá (Colombia): evidencias tectónicas y bioestratigráficas" (PDF), Geología Colombiana, 36: 197–216, retrieved 2017-08-04 Archived 2017-03-30 at the Wayback Machine




External links


Sepkoski's Online Genus Database

Kata Kunci Pencarian:

• Idang Rasjidi
• Kemala Ayu
• Cendi Luntungan
• Trigoniaceae
• Trigonia
• Trigonias
• Trigonia (plant)
• Protolychnis trigonias
• Trigonia Island
• Scaeosopha trigonia
• Trigoniidae
• Antichlidas trigonia
• Sables et Grès à Trigonia gibbosa
• Neotrigonia margaritacea