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 Myrtina n.gen. TYPE SPECIES. — Myrtina porcata n. sp. (here designated). ETYMOLOGY. — Myrtina diminutive of Myrtea . DIAGNOSIS. — Shells small to medium in size, relatively flat, sub-circular, dorsal anterior margin with more or less elevated commarginal lamellae. Sculpture of fine to prominent, closely spaced, commarginal lamellae. Radial ribs absent. Lunule lanceolate to heart-shaped, asymmetric with larger part in right valve. Two cardinal teeth in left valve and single tooth in right valve; indistinct lateral teeth present in both valves. Anterior adductor scar short, detached for about 1/5 of length. Pallial line entire. Shell margin smooth. REMARKS Alucinoma Habe, 1958 is similar in outline to Myrtina n. gen. but the type species, A. soyae Habe, 1958 , from Japan , lacks hinge teeth and the thin commarginal lamellae are prominent largely on the posterior and anterior dorsal margins of the shell.