【摘要】 本文报道了云南省的米虾共9种,其中包括4新种。标本采于1983年3—6月。其新种为:1.滇池米虾:额角上缘和后缘的齿均多,且其末端有1/3—1/2的无齿区。2.异指米虾:额角上、下缘的齿均多,第三步足雄性指节较雌性宽阔,且刺也显著粗大。3.长棍米虾:第二腹肢的雄性附肢特别延长而多刺。4.喻氏米虾:额角下缘齿数显著多于葛氏米虾。更多还原

【Abstract】 In the present paper nine species of Caridina collected by the authors from Yunnan Province in 1983 are reported. Of these species four are described as new. The type specimens are kept in the Shanghai Fisheries College. The diagnosis of the new species is given (below.Caridina dianchiensis sp. nov.Rostrum extends to the extremity of the third segment of the antennular peduncle. The upper margin is provided with 14-18 teeth, 7-10 of which are placed on carapace behind the orbit. The distal 1/3-1/2 of the upper margin is devoid of teeth.Carpus of the first leg is 1.6-2.0 times ias long as wide. Carpus of the second leg is 5.0-5.3 times as long as wide. The third legs of the male are longer than those of the female, its propodus is 3.5-3.7 times as long as dactylus, which bcears 34-37 spinu-les.The endopod of the first male pleopod is suboval in shape, and the distal 1/3 of the inner ’border is slightly concave. The proximal half of the outer border ibears long plumose setae, and the distal half is armed with long spinules. The appendix masculi-na of the second pleopod is rod-shaiped, thin but long, and bears few spines.Comparison The endopod of the first male pleopod of the new species closely resembles that of Caridina serrat-a Stimpson, but differs from the latter in the following features: (1) rostrum is long, the distal 1/2 of the up ler bor lei is devoid of teeth, the number of teeth situated on carapace behind the oribita and on ventral border of rostrum is comparatively greater; (2) palm of the first leg is shorter than the dactylus and the chela is slender; (3) proximal half of the outer border of the endopod of 1st male pleopod bears many long plumose seta and the distal half is armed with many long spinules; (4) appendix masculina of the 2nd pleopod is long and slender, and the spines are fewer; (5) spines of the exopod of the uropod are fewer.Type locality: Kunming.Caridina heterodactoyla sp. nov.Kostrum commonly extends to the extremity of the third segment of antennular peduncle. The upper margin is provided with 20-26 teeth, 8-10 of which are placed on carapace behind the orbit.Carpus of the first leg is 2.0-2.3 times as long as wide. Carpus of the second leg is 4.3-5.4 times as long as wide. The third legs of the male are longer than those of the female, propodus is 3.0-3.6 times as long as dactylus, which (bears 7 spinules, the spinu-les in male are larger than those in female. Propodus of the fifth leg is 3.2 -3.5 times as long as daetylus, which bears 36-42 spinules.The endopod of the first pleopod of male is leaf-shaped, its inner border is slightly concave, at middle; the appendix interna does not reach beyond the extremity of the endopod. The appendix masculina is spade-shaped. The inner or outer border bears many spines.Comparison The present new species closely resembles Caridina gregoriana Kemp in the shape of the endopod of the 1st male pleopod and appendix masculina of the 2nd pleopod, but differs from the latter in the following features: (1) teeth on the dorsal and ventral borders of rostrum and orbit are more numerous; (2) carpus of the 1st leg is slender; (3) propodus of the third and forth legs is similar in form and structure irrespective of sex, and the outer uropod has more spinules.Type locality: Shizong.Caridina longa sp. nov.Rostrum reaches the extremity of antennular peduncle or antennal scale, the proximal part of its upper border bears 10-12 teeth, 6-8 of which are placed on carapace behind the orbit; its ventral border bears 5-8 teeth.Carpus of first leg is 1.4-1.5 times as long" as wide, and that of the second leg is 3.8 -4.2 times. Propodus of the third is 3.4--3.8 times as long as dactylus, which bears 30-36 spinules.The endopod of the 1st pleopod is rectangular and wider proximally. The appendix masculina is very long and bears long spines on the inner and distal part.Comparison This new species closely resembles Caridina dianchiensis, sp. nov. but differs from the latter in the following features: (1) the teeth of the dorsal border of rostrum and orbit are less in number; (2)更多还原