Species Account

Pristigloma nitens (Jeffreys, 1876)

Pristiglomoidea : Pristiglomidae

Tebble name: n/a
Smith & Heppell name: Pristigloma nitens (Jeffreys, 1876)

To size: To 3.5mm. Shell Structure: Thin, fragile. Equivalve: Equivalve. Equilateral: Slightly inequilateral, beaks situated to the anterior of midline, approximately 45% of total length from anterior end. Tumidity: Moderately tumid. Outline: Sub-circular: width of shell only slightly greater than height. Posterior dorsal margin straight and gently sloping, anterior dorsal margin very short with a sharp angle in front of the umbo. Other margins well rounded. No lunule or escutcheon. Umbo prominent, swollen and raised above the dorsal margin; prodissoconch smooth, conspicuous with defined margin.

Sculpture: Primary sculpture of very fine, regular concentric lines with occasional more prominent growth stops. Also has a sculpture of extremely fine radiating lines. Margin: Smooth. Ligament: Internal, opisthodetic, prominent, elongate, dark brown ligament seated in an elongated groove which runs along the lower part of the posterior hinge plate for about half of its length. Hinge: Taxodont: relatively solid hinge plate separated into 2 distinct parts. Posteriorly the hinge plate is long, relatively narrow and slightly curved, with around 10 slightly raised and pointed chevron-shaped teeth. The anterior part of the hinge plate is short and broad with 4 larger, much less chevron-shaped teeth. Pallial Musculature: Pallial line and muscle scars indistinct. Periostracum: Pale yellowish green with a satiny texture. Colour: Translucent white to bluey grey, inside of shell lustrous. Additional Characters: Four rather elongated loops on either side of the body.

Distribution & Ecology

Rockall Trough and Bay of Biscay mostly in depths over 2000m.
Found throughout most of the Atlantic deep-sea basins.

Depth Range
Abyssal Rise (2000 - 4000m)

Additional Information & Related Species

Related Species

Pristiglomoidea : Pristiglomidae


Listed are literature citing Pristigloma nitens (Jeffreys, 1876). Reference containing the species Type Description is highlighted.

Jeffreys J G 1876. Preliminary report of the biological results of a cruise in HMS Valorous to the Davis Straits in 1875. Proceedings of the Royal Society. 25: 177-237, pls2-4.
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.
Sanders H L & Allen J A 1973. Studies on deep-sea Protobranchia (Bivalvia); prologue and the Pristiglomidae. Bulletin of the Museum of Comparative Zoology, Harvard. 145: 237-262.


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Record last modified: 17/05/2016