Fig. 1

Graphical representation of the PCA analyses (a, b) and LDA analysis (c, d). Vectors labeled as in Table 1. a, c Samples identified by locality and age. Eastern samples (N. vossi sp. nov.: V) are light gray, western samples (N. monticolus: M) are dark gray, specimens from Antioquia (N. monticolus: M1) are mid-gray. Adults (fused craniosutures) are circles, and subadults (closed craniosutures) are triangles. b, d Samples identified by locality and sex. Location symbols same as above, females—circles, males—triangles