Codakia distinguenda

Codakia distinguenda, the elegant lucine, is a species of marine bivalve mollusc. It was first described to science in 1872 by George Washington Tryon Jr.[1]

Codakia distinguenda
Exterior of valves
Interior of valves
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Subclass: Heterodonta
Order: Lucinida
Family: Lucinidae
Genus: Codakia
Species:
C. distinguenda
Binomial name
Codakia distinguenda
(Tryon, 1872)
Synonyms
  • Lucina distinguenda Tyron, 1872
  • Codakia colpoica Dall, 1901
  • Codakia pinchoti Pilsbry & H.N. Lowe, 1932

Description

The elegant lucine has large, flattened, saucer-like valves. They are the largest member of their family along the west coast of the Americas. The valves are between 50mm and 140mm (2 to 5.5 inches) in width. The exterior of the shell is white with a vivid reticulation, or net-like sculpture of rays and arcs. The interior of the shell shows rose-red margins with a creamy yellow center.[2]

Distribution

The elegant lucine is found in the east Pacific Ocean from Baja California to Peru, including the Gulf of California.[2] It is found in the Galapagos Islands.[3] It is a shallow water species that lives from the intertidal zone to 50 meters (165 feet) deep. Elegant lucines are infaunal, that is they live buried in sand or mud on the seabed.[4][5]

Life history

The elegant lucine is a filter feeder, straining plankton and other nutrients from sea water that it pumps through its body[6]. These animals also obtain energy through chemosymbiosis[5]. They acquire their symbiotic bacteria from sea water. The bacteria are bathed in the sea water pumping through the gills of the animal from which they obtain sulfides and oxygen. The bacteria use these inputs to synthesize nutritious carbon compounds that are transferred to the lucine. In times of starvation, the lucine will consume the bacteria.[7]

References
  1. Tryon, George Washington (1872). "Catalogue and Synonymy of the Recent species of the family Lucinidae". Proceedings of the Academy of Natural Sciences of Philadelphia. 24: 130.
  2. Keen, A. Myra (1958). Sea Shells of Tropical West America. Stanford, California: Stanford University Press. pp. 98.
  3. "Galapagos Species Checklist". www.darwinfoundation.org. Retrieved 2019-11-21.
  4. "Elegant Lucine | Mexico – Fish, Birds, Crabs, Marine Life, Shells and Terrestrial Life". Retrieved 2019-11-22.
  5. "Fossilworks: Codakia distinguenda". fossilworks.org. Retrieved 2019-11-22.
  6. "Codakia distinguenda Codakia distinguenda, Clam". www.reeflex.net. Retrieved 2019-11-21.
  7. Elisabeth, Nathalie H.; Gustave, Sylvie D. D.; Gros, Olivier (2012). "Cell proliferation and apoptosis in gill filaments of the lucinid Codakia orbiculata (Montagu, 1808) (Mollusca: Bivalvia) during bacterial decolonization and recolonization". Microscopy Research and Technique. 75 (8): 1136–1146. doi:10.1002/jemt.22041. ISSN 1097-0029. PMID 22438018. S2CID 7250847.
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