Spisula solidissima (Dillwyn, 1817)
Mactroidea : Mactridae
To size: To 220mm. Shell Structure: Solid. Equivalve: Equivalve. Equilateral: Equilateral. Tumidity: Quite tumid. Outline: Broadly trigonal with rounded anterior and posterior margins. Ventral margin broadly curved. Contour: Slight gape.
Sculpture: Concentric lines. Growth stages clear. Margin: Smooth. Ligament: External tiny, thin, dark brown band behind beaks. Internal set in triangular chondrophore. Hinge: LV two cardinals, which extend to halfway down the hinge plate, set in an inverted v-shape, the posterior half the length of the anterior. Single anterior and posterior laterals. RV single angular cardinal and double anterior and posterior laterals. Upper and lower surfaces of LV laterals and inner surfaces of RV laterals are serrated. Pallial Musculature: Shallow pallial sinus, to between mid-point and anterior of posterior adductor scar. Periostracum: Thin, glossy. Posterior margin crenulated to rough pale brown ridges. Colour: White.
Distribution & Ecology
Continental Shelf (to 200m)
Additional Information & Related Species
Mactroidea : Mactridae
Listed are literature citing Spisula solidissima (Dillwyn, 1817). Reference containing the species Type Description is highlighted.
Dillwyn L W 1817. A Descriptive Catalogue of Recent Shells arranged according to the Linnaen method with particular attention to the synonymy London. 580pp.
Hare M.P. & Weinberg J.R. 2005. Phylogeography of surfclams, Spisula solidissima, in the western North Atlantic based on mitochondrial and nuclear DNA sequences. Marine Biology. 145: 707-716.
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