Fig. 2. a in New species of Eugerres from the Usumacinta Province, México and Guatemala with a redescription of E. mexicanus (Steindachner, 1863) (Teleostei: Gerreidae)

Fig. 2. a) Graphical index for discrimination of Eugerres castroaguirrei (squares, n = 42) and E. mexicanus (triangles, n = 122), provide by the biplot of second anal-fin spine length against anal-fin base. b) Plot of principal components (PC) scores for E. castroaguirrei (EC) and E. mexicanus (EM) from the southeastern of Mexico and northern Guatemala.