Modiolula phaseolina (Philippi, 1844)
Mytiloidea : Mytilidae
To size: To 20mm. Shell Structure: Thin but not fragile. Equivalve: Equivalve. Equilateral: Strongly inequilateral, beaks very close to the anterior margin. Tumidity: A little inflated, umbos low. Outline: Modioliform, ligament margin slope steepness variable; posterior dorsal margin curved to almost straight; posterior rounded; ventral strtaight; anterior slightly curved but almost indistinct from ventral.
Sculpture: Smooth with comarginal lines and growth stops. Margin: Smooth. Ligament: Deeply sunken extending for most of the ligament margin. Hinge: Hinge plate narrow, a small group of crenulations below beak at all sizes; posterior crenulations/ dysodont teeth present in juveniles obscure in most adults. Pallial Musculature: Obscure but anterior adductor scar bounded by a low ridge on its inner edge. Periostracum: Of densely spaced, long simple bristles with broad triangular bases. Colour: Periostracum golden brown – brown; shell yellow-brown to dark brown. Internal lustrous, external showing through, often tinged purple brown.
Distribution & Ecology
Continental Shelf (to 200m)
Additional Information & Related Species
Mytiloidea : Mytilidae
Listed are literature citing Modiolula phaseolina (Philippi, 1844). Reference containing the species Type Description is highlighted.
Philippi R A 1844. Enumeratio molluscorum Siciliae cum viventium tum in tellure tertiaria fossilium, quae in itinere suo observavit. Vol. 2 303pp. Eduard Anton, Halle. pls 13-28.
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