Saxicavella jeffreysi Winckworth, 1930Galeommatoidea : Basterotiidae
To size: To 10mm. Shell Structure: Thin, rather fragile. Equivalve: Equivalve. Equilateral: Inequilateral, beaks distinctly in front of midline. Tumidity: Not inflated. Outline: Obliquely rhomboidal, anterior much narrower than posterior, posterior dorsal margin distinct rather straight, posterior margin obliquely subtruncate, ventral margin almost straight inclined to narrowly rounded anterior. Contour: Posterior area set off by oblique rounded ridge running from umbo to post-ventral margin (this much stronger in juvenile shells). Anterior similar but less distinct.
Sculpture: Of fine concentric lines and growth stops. Margin: Inner margin smooth. Ligament: External as a narrow band behind the beaks. Hinge: RV with a flange-like cardinal tooth fitting into corresponding depression in LV. Pallial Musculature: Pallial line wide, pallial sinus absent. Periostracum: Often persistent, yellowish to pale brown. Colour: Dirty white.
Distribution & Ecology
Of wide but sporadic occurrence across the entire shelf. North Sea records are of valves only. Lives in mud and muddy sand.
Continental Shelf (to 200m)
Juveniles & Similar Species
Key Features & Similar Species
Listed are literature citing Saxicavella jeffreysi Winckworth, 1930. Reference containing the species Type Description is highlighted.
Van Aartsen JJ & Bogi C 1998. European Marine Mollusca: Notes on less well-known species. XIV. Saxicavella angulata (S.V. Wood, 1857). La Conchiglia. 289: 56-58.
Winckworth R 1930. Notes on nomenclature 5. Some new names for British marine bivalves. Proceedings of the Malacological Society of London. 19: 14-15.
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