Species Account

Protocuspidaria (Edentaria) simplis Allen & Morgan, 1981

Verticordioidea : Cuspidariidae

Tebble name: n/a
Smith & Heppell name: n/a

To size: To 6mm. Shell Structure: Thin, fragile. Equivalve: Equivalve. Equilateral: Subequilateral, close to or slightly behind the midline. Tumidity: Moderately tumid. Outline: Body of shell deep, subcircular; anterior and ventral forming a broad continuous curve. Rostrum very short less than length of body, broad, dorsal margin straight to slightly concave, ventral margin slightly concave corresponding to a shallow sulcus at junction of rostrum and body.

Sculpture: Of co-marginal raised threads and lines becoming slightly lamellose on rostrum. Margin: Inner margin smooth. Ligament: Ligament internal, small, in a shallow resilifer behind the beaks. Hinge: Lacking anterior laminar teeth. Pallial Musculature: Obscure. Periostracum: Thin, straw in colour. Colour: Shell white. Additional Characters: The genus Protocuspidaria is recognised primarily from the structure of the septum, which has a primitive appearance in that the pores are poorly developed and the original filamental structure is visible.

Distribution & Ecology

Known from Porcupine Sea Bight and south to the Bay of Biscay in depths of 2000-4000m.

Depth Range
Abyssal Rise (2000 - 4000m)

Additional Information & Related Species


Listed are literature citing Protocuspidaria (Edentaria) simplis Allen & Morgan, 1981. Reference containing the species Type Description is highlighted.

Allen J A & Morgan R E 1981. The functional morphology of Atlantic deep water species of the families Cuspidariidae and Poromyidae (Bivalvia): an analysis of the evolution of the septibranch condition. Philosophical Transactions of the Royal Society of London Series B. 294: 413-546.
Olabarria C. 2005. Patterns of bathymetric zonation of bivalves in the Porcupine Sea Bight and adjacent abyssal plain, NE Atlantic. Deep-Sea Research I. 52: 15-31.


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Record last modified: 22/03/2016