Species Composition of Genus Calytogen in Sagami Bay: A Morphology-based Study
2004 年 59 巻 2 号 p. 61-66
詳細
2004 年 59 巻 2 号 p. 61-66
A bstract: The species composition of two species in genus calyptogena, C. soyoae and C. okutanii, was examined in three areas in Sagami Bay. Species were identified based on shell morphology. The dominant species in cold-seepage sites Off Hatsushima Island(OHI)and at the Okinoyama Bank(OB)was C. okutanii(74.4 and 60.5%, respectively). However, most Colyptogena at the Sagami Knoll(SK)were C. soyoae(90.7%) .The proportion of these two Calytogena species differed significantly among the three seepage sites. Given that most ecological studies of Calypogena have been conducted at the OHI cold-seepage site, these results suggest that most of the ecological information on Calyptogena in Sagami Bay is derived not from C. soyae but from C. okutanii.
