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Polymesoda arctata (Deshayes, 1854) Slender marsh clam |
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photo by
FAO |
| Family: | Cyrenidae () | |||
| Max. size: | ||||
| Environment: | benthic; marine | |||
| Distribution: | Western Central Atlantic: Southern Caribbean and northern South America. | |||
| Diagnosis: | Shell outline subtriangular, as high as long, inflated, heavy, slightly pointed posteriorly. Sculpture of well-defined concentric threads. Hinge with 3 cardinal teeth situated under umbo; 1 anterior and 1 posterior lateral tooth. Lateral teeth smooth. Ligament long, narrow. Periostracum with minute scales, fuzzy. Colour: externally cream-white, sometimes tinged with purple or grey, internally white often stained with purple and frequently with darker radial stripes at both ends; periostracum pale or dark brown. | |||
| Biology: | Infaunal in mud or sandy-mud in estuaries, mangrove swamps and coastal lagoons (Ref. 344). | |||
| IUCN Red List Status: | Not Evaluated (N.E.) Ref. 123251) | |||
| Threat to humans: | harmless | |||
| Country info: |
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