a new record of dasyatid fish in china: dasyatis laosensis. | one specimen was collected from the main course of lancangjiang river (upper reach of mekong) in guanlei port, xishuangbanna, yunnan, china in april, 2008. it is identified as dasyatis laosensis, a new record of dasyatidae species in china. it could be distinguished from other dasyatis species by a combination of the following characteristics: one enlarged venomous spine on the tail, ventral surface of body with orange marginal coloration, tail length greater than body length. | 2010 | 21174360 |