摘要
报道白虾属二新种 ,即新疆白虾ExopalaemonxinjiangensisLiang ,sp nov 和海南白虾Ex opalaemonhainanensisLiang ,sp nov 。
Species of the white shrimp, genus Exopalaemon , are widely distributed in brackish and freshwater areas, and are generally economic importance in China. The present paper reports two new species of the genus Exopalaemon from China The type specimens are preserved in Shanghai Fisheries University Exopalaemon xinjiangensis Liang,sp nov (Figs 1 10) The dorsal border of the rostrum bearing 10 13 teeth, variously distributed on basal crest, in some individuals they distributed continuously to the terminal portion, with 3 6 teeth on the ventral border The scaphocerite about 3 2 times as long as broad The carpus of the second leg longer than the chela, and the merus distinctly shorter than the ischium The carpus of the third leg longer than the dactylus Remarks.The present new species is similar to the Exopalaemon modestus , but it different from the latter in: 1)the body is smaller; 2) with more teeth of rostrum on dorsal and ventral borders, the teeth on dorsal border variously distributed;3) the fused part of the upper antennular flagellum is longer, and the number of articles are more;4) the scaphocerite is norrow; 5) the carpus of the second leg is slighty longer than the chela, and the merus is shorter than the ischium; 6) the dactylus of the fifth leg is shorter than or equal in length to the ischium; 7) the body and the eggs are smaller in size Type locality.Talimu River, Xinjiang,China Exopalaemon hainanensis Liang,sp nov (Figs 11 19) Rostrum shorter and wider, extending beyond the extremity of the antennular peduncle The dorsal border armed with 7 teeth; the ventral border armed with 2 teeth The telson bearing 2 pairs of dorsal movable spinules The posterior end of telson sharply pointed and surpassing the inner lateral spinules The scaphocerite rectangular in shape, and about 2 5 times as long as broad The second leg rather smaller, the carpus shorter than the merus and chela, and about 1 5 times as long as the palm The merus shorter than the ischium Remarks. The present new species is similar to Exopalaemon modestus , but it different from the latter in the follows: 1) the rostrum is rather wider, and the crest portion is longer than the sharp pointed portion; 2) the posterior end of the telson is slender and pointed, without plumose setae, reaching beyond the end of inner spines; 3) the proportion of each segments of 2nd leg is different, the chela is longer than the carpus, and the carpus is shorter than the merus, the merus is shorter than the ischium Type locality Haikou City Hainan, China Found in fish market together with E carinicauda
出处
《动物分类学报》
CSCD
2000年第3期277-281,共5页
Acta Zootaxonomica Sinica
关键词
十足目
长臂虾科
白虾属
新种
Decapoda, Palaemonidae, Exopalaemon , new species
