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Tuarangia is a Cambrian shelly fossil interpreted as an early bivalve, [1] though alternative classifications have been proposed and its systematic position remains controversial. [2] It is the only genus in the extinct family Tuarangiidae [ 3 ] and order Tuarangiida . [ 1 ]
The largest known extinct bivalve is a species of Platyceramus whose fossils measure up to 3,000 mm (118 in) in length. [ 64 ] In his 2010 treatise, Compendium of Bivalves , Markus Huber gives the total number of living bivalve species as about 9,200 combined in 106 families. [ 65 ]
Emiliodonta cuerdai is a bivalve first described in 1999 by Teresa M. Sánchez from fossils from sediments of the late Middle Ordovician, Caradocian-aged Don Braulio Formation. The formation outcrops on the flank of Sierra de Villicum in the Argentina precordillera .
The family Camyidae was first proposed by Hinz-Schallreuter in a 2000 paper discussing the Cambrian bivalves from Bornholm and reviewing the proposed Cambrian bivalve taxa of the time. In the same paper, Hinz-Schallreuter noted that the species Modiolopsis thecoides , known from one specimen which is now lost, most likely belonged to Camya . [ 3 ]
All species of this genus, including the remaining extant species, G. humanus, are found in the fossil record from the Cretaceous to the Pliocene (age range: from 99.7 to 2.588 million years ago). Fossils are found in the marine strata of Eastern North America, Eurasia and the Indo-Pacific. [2] Fossil shell of Glossus humanus from Pliocene of Italy
Gryphaea, one of the genera known as devil's toenails, is a genus of extinct oysters, marine bivalve mollusks in the family Gryphaeidae. These fossils range from the Triassic period to the middle Paleogene period [citation needed], but are mostly restricted to the Triassic and Jurassic. They are particularly common in many parts of Britain.
This category lists bivalve taxa which died out before 1500. Bivalves which became extinct after the year 1500, and/or are extinct according to the IUCN Red List, are listed in Category:Extinct bivalves.
Hemiconcavodonta minuta is a bivalve which was first described in 1999 by Teresa M. Sánchez from fossils from sediments of the late Middle Ordovician, Caradocian-aged Don Braulio Formation. The formation outcrops on the flank of Sierra de Villicum in the Argentina precordillera .