Another New Calyptogena Clam from Deep-Sea Seeps off the Sanriku Coast and in Sagami Bay, Japan (Mollusca: Bivalvia)

Abstract

Among deep-sea chemosynthesis-based communities with large-scale Calyptogena soyoae/okutanii aggregations in the Off Hatsushima Island seep site, another new vesicomyid species, C. fortunata, was discovered. The analyzed DNA data of these specimens correspond to those from the Off Sanriku coast site, in spite of the fact that shell characters of specimens from both localities show a slight difference, probably representing phenotypic variability.