Microgloma tumidula (Monterosato, 1880)
Nuculanoidea : Nuculanidae
Minute, relatively solid.
Slightly inequilateral, beaks situated to the posterior of midline, approximately 40-45% of total length from posterior end.
Oval, anteriorly extended; height of shell approximately 80% of the length; dorsal margin straight, very short posteriorly, longer anteriorly; posterior margin gently rounded, anterior margin extended and more strongly rounded; ventral margin rounded, lunule and escutcheon absent; umbo not prominent, projecting slightly above the dorsal margin, prodissoconch conspicuous.
Sculpture: Very fine, regular concentric lines, increasing in prominence towards the ventral margin; also very faint radial lines. Margin: Smooth. Ligament: Internal, amphidetic, oval, sat in a simple resilifer below the beaks. Hinge: Taxodont: hinge relatively strong with 3 large, blunt, chevron-shaped teeth either side of the ligament. Pallial Musculature: Indistinct. Periostracum: Glossy, very pale straw coloured. Colour: Translucent white. Additional Characters: Elongated coils along the dorsum on both sides of the body.
Distribution & Ecology
Continental Margin Zone (200 - 500m)
Bathyal (500 - 2000m)
Abyssal Rise (2000 - 4000m)
Additional Information & Related Species
Nuculanoidea : Nuculanidae
Listed are literature citing Microgloma tumidula (Monterosato, 1880). Reference containing the species Type Description is highlighted.
Ockelmann K & Warén A 1998. Taxonomy of and biological notes on the bivalve genus Microgloma with comments on Protobranch nomenclature. Ophelia. 48(1): 1-24.
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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