A new species of anostomid characoid fish, Anostomus spiloclistron, from the Nickerie river system of western Surinam (Pisces, Cypriniformes, Anostomidae)

A new species of the anostomid characoid genus Anostomus is described from the Nickerie river system of western Surinam. The new species appears to be most closely related to A. plicatus Eigenmann, 1912, from the Essequibo river system of Guyana. Diagnostic features include the number of lateral line scales, the number of midventral scales between the pelvis and the anus, certain proportional measurements, and differences in the colour pattern.