Arcinella arcinella (Linnaeus, 1767)
Spiny jewelbox
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Family:  Chamidae (jewel box shells)
Max. size:  5.33 cm DL (male/unsexed)
Environment:  benthic; marine; depth range 2 - 73 m
Distribution:  Western Atlantic: Caribbean Sea, from Florida to Brazil.
Diagnosis:  Shell: convex valves, slightly inequivalved and inequilateral; coloration is cream or delicately pink; sculpture consists of a score of radialribs decorated with spines whose breadth progressively increases from the umbo to the ventral margin of the valve; between the ribs are small granulations, irregularly arranged; lunule is very differentiated and heart-shaped; ligament is external, hinge is pachyodont; two large muscle scars (posterior is bigger than the anterior; dimyarian, anisomyarian), pallial line is continuous with no sinus. Body: foot is reduced to keep with its sedentary life; mantle cavity has a pair of gills, each with two series of lamellae, extensively fused by interlamellar junctions (eulamellibranch).
Biology: 
IUCN Red List Status: Not Evaluated (N.E.) Ref. 123251)
Threat to humans: 
Country info:   
 

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