Glycymeris longior Temporal range: Middle Pleistocene–present, | |
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Glycymeris longior valve from the Atlantic coast of Argentina | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Bivalvia |
Order: | Arcida |
Family: | Glycymerididae |
Genus: | Glycymeris |
Species: | G. longior |
Binomial name | |
Glycymeris longior (G. B. Sowerby I, 1833) | |
Synonyms [2] | |
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Glycymeris longior is a species of marine bivalve of the family Glycymerididae. The shells of this species are frequently found on beaches from Patagonia to Brazil. It was common in the Quaternary on the Atlantic coast of South America. [2] [3] [4]
Glycymeris longior is a species of dioecious and long-lived clam (there are records of individuals that have reached 69 years). It has porcelain, subcircular valves (equivalve and equilateral) of brownish color with annual rings. The maximum height of the valves is 50 mm. In the hinge (engagement structure), the valves are articulated by a series of pits (cavities) and triangular teeth (nine on each side). The inner edges of the valves are crenulate (festoon or wave-shaped) and, together with the system of teeth and pits, keep the valves aligned. The ligament has striated grooves. Inside the valves you can see the imprints of the adductor muscles, which are semi-oval and unequal. It has short palps, large filibranchs, unfused mantle margins and a large foot, with which it buries itself slowly. It lacks siphons. [4] The species of this genus are used in sclerochronological studies (study of the growth rings of the valves) for environmental reconstructions, given their longevity, wide geographical distribution, record of environmental variations in their valves and extensive fossil record, among others. [4]
This species is found in the Atlantic Ocean, in the southwestern coast of South America, from the state of Espirito Santo, Brazil to the San Matías Gulf in Argentina, [5] with some studies suggesting it might be found up to the northern state of Pará, in Brazil. [6] [7]
Glycymeris longior is found buried in or just above sandy soils in shallow waters, up to 10 meters deep. [8] [9]
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Mactridae, common name the trough shells or duck clams, is a family of saltwater clams, marine bivalve mollusks in the order Venerida.
Limaria, the file shells or file clams, is a genus of marine bivalve molluscs in the family Limidae.
Glycymerididae, often misspelled as Glycymeridae, common names dog cockles or bittersweets, is a worldwide family of salt water clams, marine bivalve mollusks in the order Arcida. They are related to the ark clams. This family contains 45 extant species in four genera.
Corbulidae is a family of very small saltwater clams, marine bivalve molluscs in the order Myida.
The Semelidae are a family of saltwater clams, marine bivalve molluscs in the order Cardiida.
Spisula is a genus of medium-sized to large marine bivalve mollusks or clams in the subfamily Mactrinae of the family Mactridae, commonly known as surf clams or trough shells.
Corbula is a genus of very small saltwater clams, marine bivalve molluscs in the family Corbulidae, the basket clams.
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Glycymeris, common name the bittersweet clams, is a genus of saltwater clams, marine bivalve molluscs in the family Glycymerididae.
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Glycymeris nummaria is a species of saltwater clam, a marine bivalve mollusc in the family Glycymerididae, the bittersweet clams.
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Lucina is a genus of saltwater clams, marine bivalve molluscs.
Glycymeris yessoensis is a species of bivalve mollusc in the family Glycymerididae. It can be found burrowing in soft sediment in shallow water in the Pacific Ocean around the coasts of China and Japan. It is often associated with a polychaete worm with which it forms a commensal relationship.
Rangia cuneata or Atlantic rangia, also known as wedge clam, gulf wedge clam, common rangia, and cocktail clam, is a mollusc native to the Gulf of Mexico. It is an oval clam with a body length of up to 5cm, living from the intertidal zone to depths of 124 meters. It is edible and is harvested for food in Mexico, and has been so since pre-Hispanic times.