A new genus and species of shrimp(Crustacea:Axiidea:Axiidae)from the Caroline Ridge,Northwest Pacific  

作　　者：Qi KOU Gary C.B.POORE Xinzheng LI 

机构地区：[1]Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China [2]Center for Ocean Mega-Science,Chinese Academy of Sciences,Qingdao266071,China [3]Laboratory for Marine Biology and Biotechnology,Pilot NationalLaboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China [4]University of Chinese Academy of Sciences,Beijing 100049,China [5]Museums Victoria,PO Box 666,Melbourne,Vic.3001,Australia

出　　处：《Journal of Oceanology and Limnology》2021年第5期1830-1840,共11页海洋湖沼学报（英文）

基　　金：the Science&Technology Basic Resources Investigation Program of China(No.2017FY100804);the Natural Science Foundation of China(Nos.41930533,41876178);the National Key R&D Program of China(No.2018YFC0309804);the China Ocean Mineral Resources Research and Development Association Program(Nos.DY135-E2-1-02,DY135-E2-3-04)。

摘　　要：A new genus and species of axiid shrimp,Carolinaxius kexuae gen.et sp.nov.is described and illustrated based on a single specimen collected from an unnamed seamount in the Caroline Ridge,Northwest Pacific.Although both chelipeds are mis sing,the specimen can be distinguished from other axiid genera by a combination of characteristics:narrowly triangular ro strum;median carina and lateral gastric carina each with one prominent tooth;submedian gastric carinae converging po steriorly,with teeth;cornea weakly pigmented,eyestalk with acute distome sial tooth on dorsal surface;male pleopod 1 two-articled;pleopod 2 with appendix interna and appendix masculina;pleopods 3-5 with appendix interna.The molecular phylogeny suggests the new genus is most closely related to another recently described genus living inside hexactinellid sponges on seamounts in the Indian Ocean,Montanaxius Dworschak,2016.However,it differs from Montanaxius in the shape of the rostrum,the arrangement of teeth on the carapace,and the shape of the eyestalk.Besides,the significant molecular differences support the two belonging to different genera.

关 键 词：Carolinaxius kexuae gen.et sp.nov. taxonomy molecular evidence DEEP-SEA SEAMOUNT 

分 类 号：Q959[生物学—动物学]