Morphology and molecular phylogeny of Paragorgia rubra sp.nov.(Cnidaria:Octocorallia),a new bubblegum coral species from a seamount in the tropical Western Pacific  

作　　者：李阳 詹子锋 徐奎栋 

机构地区：[1]Department of Marine Organism Taxonomy and Phylogeny,Institute of Oceanology,Chinese Academy of Sciences [2]Laboratory for Marine Biology and Biotechnology,Qingdao National Laboratory for Marine Science and Technologys [3]University of Chinese Academy of Sciences

出　　处：《Chinese Journal of Oceanology and Limnology》2017年第4期803-814,共12页中国海洋湖沼学报（英文版）

基　　金：Supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA11030201);the National Natural Science Foundation of China(No.41406162);the CAS/SAFEA International Partnership Program for Creative Research Teams(No.20140491526)

摘　　要：A new species of bubblegum coral, Paragorgia rubra sp. nov., discovered from a seamount at a water depth of 373 m near the Yap Trench is studied using morphological and molecular approaches. Paragorgia rubra sp. nov. is the fourth species of the genus found in the tropical Western Pacific. The new gorgonian is red-colored, uniplanar, and measures approximately 530 mm high and 440 mm wide, with autozooids distributed only on one side of the colony. Paragorgia rubra sp. nov. is most similar to P. kaupeka Sainchez, 2005, but differs distinctly in the polyp ovals with large and compound protuberances （vs. small and simple conical protuberances） and the medullar spindles possessing simple conical protuberances （vs. compound protuberances）. Moreover, P. rubra sp. nov. differs from P. kaupeka in the smaller length/ width ratio of surface radiates （1.53 vs. 1.75 ）. The genetic distance of the mtMutS gene between P. rubra sp. nov. and P. kaupeka is 0.66%, while the intraspecific distances within Paragorgia Milne-Edwards ＆ Haime, 1857 except the species P. regalis complex are no more than 0.5%, further supporting the establishment of the new species. Furthermore, the ITS2 secondary structure ofP. rubra sp. nov. is also different from those of congeners. Phylogenetic analyses indicate Paragorgia rubra sp. nov. and P. kaupeka form a clade, which branched early within Paragorgia and diversified approximately 15 Mya.A new species of bubblegum coral,Paragorgia rubra sp.nov.,discovered from a seamount at a water depth of 373 m near the Yap Trench is studied using morphological and molecular approaches.Paragorgia rubra sp.nov.is the fourth species of the genus found in the tropical Western Pacific.The new gorgonian is red-colored,uniplanar,and measures approximately 530 mm high and 440 mm wide,with autozooids distributed only on one side of the colony.Paragorgia rubra sp.nov.is most similar to P.kaupeka Sánchez,2005,but differs distinctly in the polyp ovals with large and compound protuberances(vs.small and simple conical protuberances) and the medullar spindles possessing simple conical protuberances(vs.compound protuberances).Moreover,P.rubra sp.nov.differs from P.kaupeka in the smaller length/width ratio of surface radiates(1.53 vs.1.75).The genetic distance of the mtMutS gene between P.rubra sp.nov.and P.kaupeka is 0.66%,while the intraspecific distances within Paragorgia Milne-Edwards & Haime,1857 except the species P.regalis complex are no more than 0.5%,further supporting the establishment of the new species.Furthermore,the ITS2 secondary structure of P.rubra sp.nov.is also different from those of congeners.Phylogenetic analyses indicate Paragorgia rubra sp.nov.and P.kaupeka form a clade,which branched early within Paragorgia and diversified approximately 15 Mya.

关 键 词：GORGONIAN taxonomy new species genetic distance molecular phylogeny 

分 类 号：Q959[生物学—动物学]