恒河猴和食蟹猕猴：泰国的杂交。

Science. 1964 Jan 24;143(3604):363-4. doi: 10.1126/science.143.3604.363.

Conspecificity of the rhesus macaque, Macaca mulatta mulatta (Zimmermann, 1780), and the crab-eating macaque Macaca mulatta fascicularis (Raffles [1821]), is established by a geographically intermediate series of three specimens transitional in tail length and coat color.

恒河猴（Macaca mulatta mulatta）和食蟹猴（Macaca mulatta fascicularis）的同物异性被地理上的中间系列的三个尾巴长度和毛色过渡的标本所证实。