Astarte concentrica

Kingdom: Animalia Phylum: Mollusca Class: Bivalvia Subclass: Autobranchia Order: Carditida Family: Astartidae Genus: Astarte (Sowerby, 1816) Species: Astarte concentrica (Conrad, 1834) Four specimens; Three specimens are of Astarte concentrica and one specimen of a different species. The three Astarte concentrica are two individual right valves and one left valve. Thin, prominent growth lines. Small, triangular umbo. Adductor scars are visible on the interior part of the valve. Heterodont dentition. Rounded ventral margin and triangular dorsal margin. The smaller specimen of a different species has prominent longitudinal ribs (0.15 cm) with faint knobs on the ribs. Circular ventral margin and triangular/rounded dorsal margin.