云南省米虾属一新种(十足目:匙指虾科)  

A New Species of Caridina from Yunnan,China (Decapoda:Caridea:Atyidae)

作　　者：王忠泽[1] 梁象秋[2] 

机构地区：[1]云南大学生物系,昆明650091 [2]上海水产大学,上海200090

出　　处：《Zoological Research》2001年第4期303-306,共4页动物学研究（英文）

摘　　要：报道了米虾属一新种———昆明米虾CaridinakunmingensisWangetLiang ,sp nov 。昆明米虾与石林米虾CaridinashilinicaLiangetCai 2 0 0 0有相似之处 ,但前者额角较短 ,前两对步足腕节和螯短而粗 ,雄性第 1腹肢内肢、雄附肢形态和结构均与后者不同。The present paper deals with a new species of Caridina collected from Kunming,Yunnan Province in 1983. CaridinakunmingensisWangetLiang,sp.nov. Rostrum reaches to the extremity of 2nd segment of the antennular peduncle.The dorsal border bears 11-19 teeth,6-9 of which are situated on the carapace behind orbital margin.The ventral border bears 2-7 teeth.Ultimate segment of 3rd maxilliped is longer than penultimate segment,pemultimate segment and antepenultimate segment are the same in length. Carpus of lst leg is 1.6-1.8 times as long as wide.Chela is 2-2.1 times as long as wide.Carpus of 2nd leg is 4-4.6 times as long as wide,chela is 2.3-2.6 times as long as wide.Propodus of 3rd leg is 2.6-3.7 times as long as dactylus,which bears 6-7 spinules.Propodus of 5th leg is 3.4-4.5 times as long as dactylus,which bears 29-32 spinules.Endopod of lst male pleopod is ovate.The proximal half of the outer margin bears long plumose setae,and the distal half is armed with longer spinules.The appendix masculina of 2nd pleopod is rod-shaped,and bears many large spines in inner margin. Remarks:The present new species closely allied to Caridina shilinica Liang et Cai,2000,but differs from the latter in following features:①rostrum is shorter;②carpus and chela of lst and 2nd legs are shorter and thicker;③carpus of 2nd leg is shorter than merus;④ultimate segment of 3nd maxilliped is longer than antepenultimate segment;⑤the outer-distal angle of endopod of lst maxilliped is round;⑥the thorns of appendix masculina are larger and fewer;⑦the shape and structure of endopod of lst male pleopod and appendix masculina are different.

关 键 词：匙指虾科 米虾属 新种 云南 

分 类 号：Q959.223[生物学—动物学]