Diversity of chemosymbiotic bivalves on coral reefs: Lucinidae (Mollusca, Bivalvia) of New Caledonia and Lifou Author Glover, Emily A. Author Taylor, John D. Department of Zoology, The Natural History Museum, London SW 7 5 BD (United Kingdom) emily. glover @ dial. pipex. com j. taylor @ nhm. ac. uk taylor@nhm.ac.uk text Zoosystema 2007 29 1 109 181 journal article 10.5281/zenodo.5392295 1638-9387 5392295 Genus Parvidontia n. gen. TYPE SPECIES. — Parvidontia laevis n. sp. (here designated). ETYMOLOGY. — Latin parvi , small, and Greek odontos , teeth. DIAGNOSIS. — Small, thin-shelled, subcircular, umbones prominent, external surface smooth except for fine commarginal threads. Ligament external, very short. Hinge narrow, teeth small, left valve with 2 cardinal teeth, of which anterior is larger and projecting; right valve with 2 cardinals of which anterior is very small. Lateral teeth absent. Anterior adductor scar narrow, detached for 1/2 length. Pallial line entire, broad with dorsal extensions. Inner shell margin smooth. REMARKS The smooth, thin shell of Parvidontia n. gen. , with fine commarginal growth increments, resembles Anodontia and Leucopshaera species but can be easily distinguished by the presence of cardinal teeth.