インド洋の熱水噴出孔生物群集に生息するシンカイヒバリガイ属の 1 新種

抄録

A new species, Bathymodiolus marisindicus n. sp., is described based on specimens collected at a hydrothermal vent site in the Indian Ocean. This new species differs from B. thermophilus by the absence of the inner mantle fusion and a very short valvular siphonal membrane. Bathymodiolus marisindicus n. sp. resembles B. septemdierum and B. brevior from the western Pacific Ocean. However, it is distinguishable from these species by the height/length ratio, the length and strength of the ligament, the positions of the anterior retractor muscle scar and the anterior bundle scar of posterior byssal retractor muscle, the thickness of the pedal retractor muscle and by the shape of the intestine.