Morphology, taxonomic status and distribution of the opisthobranch mollusc Coryphella (s.l.) japonica from the central deep water basin of the Sea of Japan
- 標題
- Morphology, taxonomic status and distribution of the opisthobranch mollusc Coryphella (s.l.) japonica from the central deep water basin of the Sea of Japan
- 作者
- Alexander V. Martynov
- 文件屬性
- 國外期刊
- 知識分類
- 基礎研究
- 出版年
- 2011
- 刊名
- Deep Sea Research Part II
- 關鍵字
- Pacific Ocean; Sea of Japan; Deep waters; Invertebrates; Opisthobranch molluscs; Morphology; Distribution; Paedomorphosis
- 點閱數
- 2433
摘要
The opisthobranch fauna (Gastropoda: Opisthobranchia) of the deep sea basins of the Sea of Japan is reviewed. A detailed description of the most common deep sea nudibranch species Coryphella japonicaVolodchenko, 1941 is given based on materials from various expeditions (including R/V “Vityaz” cruises and SoJaBio project). Distinct morphological features of C. japonica are discussed and its valid taxonomic status is confirmed. The considerable radular variability of C. japonica for the first time is documented using a scanning electron microscope. Unique features of the bathymetric distribution of C. japonica ranging from shelf to the abyssal depths are discussed in connection with the “pseudabyssal area” concept. C. japonica was compared to its assumed synonym C. salmonacea, and to similar C. athadona. Material from all these species, including types of C. japonica, was examined externally, anatomically via dissection, and SEM. C. salmonacea is restricted to North Atlantic and Arctic only, whereas C. japonicainhabits NE Pacific including deep water basins of the Sea of Japan.