Glycymeris longior
Glycymeris longior valve from the Atlantic coast of Argentina.
Scientific classification Edit this 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)

Glycymeris longior is a species of living marine clam (Mollusca, Bivalvia) of the genus Glycymeris. It was common in the Quaternary on the Atlantic coast of South America. The shells of this species is frequently found on beaches from Patagonia to Brazil.[1][2][3]

Description

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.[3] 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.[3]

Range

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,[4] with some studies suggesting it might be found up to the northern state of Pará, in Brazil.[5][6]

Habitat

Glycymeris longior is found buried in or just above sandy soils in shallow waters, up to 10 meters deep.[7][8]

References

  1. ↑ "WoRMS - World Register of Marine Species - Glycymeris longior (G. B. Sowerby I, 1833)". www.marinespecies.org. Retrieved 2023-10-10.
  2. ↑ "Glycymeris longior". iNaturalist. Retrieved 2022-01-08.
  3. 1 2 3 Doldan, María del Socorro (2021). «Ficha Malacológica. Almeja Castañuela, Glycymeris longior (G.B. Sowerby I, 1833». Boletín de la Asociación Malacológica Argentina 11 (2). ISSN 2314-2219. malacoargentina.com.ar/blog/wp-content/uploads/2021/12/Boletin-ASAM-11_2.pdf
  4. ↑ Zelaya, Diego G. (2015-11-13). "Marine Bivalves from the Argentine Coast and Continental Shelf: Species Diversity and Assessment of the Historical Knowledge *". American Malacological Bulletin. 33 (2): 245. doi:10.4003/006.033.0204. hdl:11336/59604. ISSN 0740-2783. S2CID 85609876.
  5. ↑ Gimenez, Lucas H.; Doldan, María del Socorro; Zaidman, Paula C.; Morsan, Enrique M. (2020-01-13). "Age and growth of Glycymeris longior (Sowerby, 1832) clam at the southern edge of its distribution (Argentine Sea)". Helgoland Marine Research. 74 (1): 2. doi:10.1186/s10152-020-0534-x. hdl:11336/138422. ISSN 1438-3888. S2CID 210158201.
  6. ↑ Rocha, Valesca Paula; Matthews-Cascon, Helena (2014). "The Family Glycymerididae (Mollusca: Bivalvia) from North And Northeast Brazil". {{cite journal}}: Cite journal requires |journal= (help)
  7. ↑ "CdB - Conquiliologia". www.conchasbrasil.org.br. Retrieved 2022-01-08.
  8. ↑ Museu Nacional/UFRJ. "Glycymeris longior".
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