Chione cancellata: Difference between revisions
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| ordo = [[Veneroida]] |
| ordo = [[Veneroida]] |
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| familia = [[Veneridae]] |
| familia = [[Veneridae]] |
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| genus = ''[[Chione]]'' |
| genus = ''[[Chione (genus)|Chione]]'' |
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| species = '''''C. cancellata''''' |
| species = '''''C. cancellata''''' |
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| binomial = ''Chione cancellata'' |
| binomial = ''Chione cancellata'' |
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Revision as of 18:52, 8 February 2007
| Cross barred venus | |
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| Species: | C. cancellata
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| Binomial name | |
| Chione cancellata Linnaeus, 1767
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The cross barred venus, Chione cancellata, is a marine bivalve mollusc. It grows to be 1 3/4 inches, and has a rounded, triangular shell with strong concentric ridges and strong radial ribbing from a raised crisscross pattern of ridges. It possesses crenulations on its bottom edge, with lateral and cardinal teeth on the hinge. Its coloration varies, with a grayish yellow-white exterior and occasionally has a few lavender radial stripes, its interior is usually purple. The species commonly lives on sandy bottoms of sounds and shallow offshore waters and are commonly found washed on to sound and ocean beaches. Its habitat ranges from New Jersey to Brazil. Although it is sweeter in taste than the northern quahog, Mercenaria mercenaria, it is rarely eaten.
Genetic evolution and anatomy
The common tropical western Atlantic venerid bivalve, Chione cancellata (Linnaeus), was revised in 2000, on the basis of morphological, morphometric and phylogenetic analyses. Specimens inhabiting waters off the United States and Central America south to Belize, comprise a different species, described originally by Say as Chione elevata. Examination of specimens of both species supported the separation, including difference in shell sculpture, hinge morphology and size of the pallial cavity.
A phylogenetic analysis of extant species failed to resolve the relationship between C. cancellata and C. elevata. Separation of the two species suggests an ancient division of the western Atlantic variety in the northern Caloosahatchian Province from the southern Atlantic Gatunian Province. The division has been dated back to the Early Pliocene.
