Ungulinidae is a family of marine bivalve molluscs.
The members of this family are found in muddy sand or gravel at or below low tide mark. They have characteristically rounded shells with forward-facing umbones (projections). The valves are flattened and deeply etched with concentric rings. Each valve bears two cardinal and two plate-like lateral teeth. These molluscs do not have siphons but the extremely long foot makes a channel which is then lined with slime and serves for the intake and expulsion of water.
Genera and species
Diplodonta Bronn, 1831Diplodonta aleutica Dall, 1901Diplodonta candeana (d'Orbigny, 1842)Diplodonta cornea (Reeve, 1850)Diplodonta discrepans (Carpenter, 1857)Diplodonta globus (Finlay, 1927)Diplodonta impolita S. S. Berry, 1953Diplodonta inezensis (Hertlein and Strong, 1947)Diplodonta lupina Brocchi, 1814Diplodonta notata Dall and Simpson, 1901Diplodonta nucleiformis Wagner, 1838Diplodonta obliqua Philippi, 1846Diplodonta orbella (Gould, 1851)Diplodonta punctata (Say, 1822) — Atlantic diplodonDiplodonta rotundataDiplodonta semiaspera Philippi, 1836 — pimpled diplodonDiplodonta sericata (Reeve, 1850)Diplodonta soror C. B. Adams, 1852Diplodonta striatula (Finlay, 1927)Diplodonta subglobosa C. B. Adams, 1852Diplodonta torrelli Jeffreys, 1976Diplodonta venezuelensis Dunker, 1848Diplodonta verrilli Dall, 1900 — Verrill's diplodonFelaniella Dall, 1899Felaniella cornea (Reeve, 1850)Felaniella gericata (Reeve, 1850)Felaniella parilis (Conrad, 1848)Felaniella rakiura (Powell, 1939)Felaniella sericata (Reeve, 1850)Felaniella usta (Gould, 1861)Felaniella vilardeboana (d'Orbigny, 1846)Felaniella zelandica (Gray, 1835)PhlyctidermaPhlyctiderma notata (Dall and Simpson, 1901)Phlyctiderma phoebe (Berry, 1960)Phlyctiderma semiaspera (Philippi, 1836)UngulinaUngulina cuneata (Spengler, 1782)
