摘要
本文记述采自安徽无为县的沼虾属一新种,安徽沼虾Macrobrachium anhuiense,sp.nov.,新种与九江沼虾M.kiukianensis Yu相近似,但新种:额角上缘除第1—2齿之间距较大外,眼上方之齿排列较密,额角下缘齿之间距小于末齿至尖端的距离;头胸甲光滑,约为体长的1/3;第三颚足短,末端仅伸至触角柄第一节,第二步足较长,掌部无颗位状突起,有分散之微刺。模式标本存安徽师范大学生物系。
The present paper deals with a new species of Macrobrachium collected from Anhui Province in 1988. The type specimens are deposited in the Anhui Normal University. Macrobrachium anhuiense sp. nov.(figs. 1-4)Rostrum extending beyond the extremity of the antennular peduncle. Upper margin with 7-9 teeth, 2 of which situated on the carapace behind orbit. Lower margin with 2-3 teeth.Second legs shorter than the body in adult, about 0.5-0.7 times as long as body length. Dactylus shorter than palm, fixed finger with a very small tooth on proximal part of cutting edge, movable finger bearing 2 smaller teeth on the same part of cutting edge. carpus conical, longer than merus or ischium.The present new species is closely allied to Macrobrachium kiukianensis Yu, but differs from the latter in the following features: (1) Teeth above the eyes of the upper margin of rostrum are placed slightly closer together. The distance between these teeth of the lower margin is smaller than that from the last tooth to the tip. (2) Carapace smooth, the length of which is about 1/3 of the body length. (3) The end of scaphocerite broadly rounded. (4) The exopod of 3rd maxilliped short, its distal end reaches to 1st segment of antennular peduncle. (5) Second legs rather long, palm smooth, without tubercles, with some scattered spinules ouly, distal end of carpus reaching distal border of scaphocerite. (6) Third leg rather short, distal end of its dactylus extends near to distal border of scaphocerite.Type species Holotype 1♂, paratypes 10♂♂, 10♀♀.Type locality Wuwei County (31°20'N, 117°54'E), Anhui Province.
出处
《动物分类学报》
CSCD
1991年第3期286-289,共4页
Acta Zootaxonomica Sinica
关键词
十足目
长臂虾科
沼虾属
新种
Decapoda Palaemonidae Macrobrachum new species.
