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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 shells of bivalves are used in craftwork, and the manufacture of jewellery and buttons. Bivalves have also been used in the biocontrol of pollution. Bivalves appear in the fossil record first in the early Cambrian more than 500 million years ago. The total number of known living species is about 9,200. These species are placed within 1,260 ...
Pulvinitidae is a family of saltwater clams, marine bivalve molluscs in the order Pteriida.These bivalves are related to the scallops and oysters.Originally believed to be extinct and known only from fossil records, non-fossil shells of members of this family were first discovered in 1913 by the Australian research vessel HMS Endeavour off the coast of Victoria.
Entobia in a bivalve shell, Florida.. Entobia is a trace fossil in a hard substrate (typically a shell, rock or hardground made of calcium carbonate) formed by sponges as a branching network of galleries, often with regular enlargements termed chambers.
Arca mailleana is an extinct species of saltwater clam, a fossil marine bivalve mollusk in the family Arcidae, the ark shells. This species was described by Alcide d'Orbigny in 1843. This species was described by Alcide d'Orbigny in 1843.
Individuals of this species typically reached 1 m (3 ft 3 in) or more in axial length, but some exceptional specimens 3 m (9 ft 10 in) long have been found, [1] making it the largest known bivalve. Its huge but very thin shell often provided shelter for schools of small fish, some of which became trapped and fossilised themselves.
Paphia is a genus of saltwater clam, a marine bivalve mollusk in the subfamily Tapetinae of the family Veneridae, the Venus clams. [1] This genus is known in the fossil records from the Cretaceous to the Quaternary (age range: from 112.6 to 0.0 million years ago). [2]
Up until the mid-20th century, the Juliidae were known only from fossil shells, and not surprisingly, these fossils were interpreted as being the shells of bivalves. Julia , which is the type genus of the family, was named in 1862 by Augustus Addison Gould , who described it as a bivalve genus.