云南平鳍鳅科鱼类二新种

在编写《云南省动物志》的准备工作中,我们又一次整理了云南境内的平鳍鳅科鱼类标本,从中发现平鳍鳅亚科鱼类二新种,现描述于下。 长体爬鳅 Balitora elongata Chen et Li,新种（图1） 正模 编号839072,全长80毫米,体长62毫米。1983年9月采自云南漾濞河（属澜沧江水系）。 副模 编号748791,839073,839074分别于1974年8月、1983年9月采自漾濞河。745049,745050于1974年5月采自勐腊县曼庄（属澜沧江水系）。

ON TWO NEW SPECIES OF HOMALOPTERIDAE FISHES FROM YUNNAN

The present paper reports two new species of homalopteridae fishes from Yunnan. They are diagnosed as follows.Balitora elogata Chen et Li, sp. nov.Holotype. No. 839072, standard length 62 mm., from Yangbi River.Paratypes. 5 specimens, standard length 62-70 mm., from the same river system as holotype.D. 3, 85 A. 2, 5; P. 10-11, 11-12; V. 3-4, 8-10. L. I. 65-67.This new species is similar to Balitora brucei Gray, but differs from the later in having a slender body, depth in length 8.9 (8.2-9.3) vs. 6.7; more undivided rays in pectoral fins, 10-11 vs. 8; and more rays in ventral fins, 3-4, 8-10 vs. 2, 6; and having a wider head.Hemimyzon megalopseos Li et Chen, sp. nov.Holotype. No 774193, standard length 61 mm., collected at Yiliang, Yunnan Province.Paratypes. 10 specimens, standard length 49-69 mm., from the same locality as holotype.D. 2, 7-8; A. 2, 5; P. 10-11, 11-12; V. 3-4, 10-11. L. I. 75-78.The present species is closely allied to Hemimyzon formosanum (Bou-lenger), but the former can be easily distinguished from the latter by the following characters. Its eye is larger, the diameter of eye contains 4.0-4.6 times in length of head vs. 6.4-7.2 times. Distance between inner bases of pectoral fins is as long as the base of pectoral fin, while it is much smaller in Hemimyzon formosanum (Boulenger). L. I. 75-78 vs. 67-72. The new species is also similar to Hemimyzon macroplera Zheng from the same river system but differs from the latter in fin formulae. P. 10-11, 10-12 v. 12, 13-14; V. 3-4, 10-11 . 6-7, 13-14.All the type specimens are kept in the Kunming Institute of Zoology, Academia Sinica.