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 Subgenus Pegophysema Stewart, 1930 TYPE SPECIES. — Lucina schrammi Crosse, 1876 (original designation). DIAGNOSIS. — As Anodontia , shells large, moderately inflated, thin-shelled, outer surface with prominent, irregular, rounded, commarginal ridges. Ligament internal, shallowly to deeply inset. Anterior adductor scar short, detached for 70% of length. Pallial line entire, with secondary pallial attachment scars ( Fig. 3 ) extending posteriorly from below anterior adductor scar.