FIGURE 5. A–D in Geographic variation, phylogeny and systematic status of Gracilinanus microtarsus (Mammalia: Didelphimorphia: Didelphidae)

FIGURE 5. A–D Ventral and lateral view of left tympanic region of "small microtarsus" (A and C, MZUSP 29159) and "large microtarsus" (B and D, UFMG 2535), illustrating morphological differences of the alisphenoid tympanic process in adult males. Scale = 2 mm; E–G Lateral cranial view of C1-P3 in G. microtarsus ("small microtarsus") (E, MZUSP 29159), G. agilis ("midwest") (F, UFMG 2487) and Cryptonanus sp. (G, FURB 9362) illustrating taxonomic differences in the relative height of P2 versus P3 in adult males. Scale = 1 mm; H–I Ventral view of the carpus, manus, radius, and ulna in Gracilinanus microtarsus showing differences on lateral carpal tubercle (lct). Specimens of "small microtarsus" (H, MZUSP 31009) and "large microtarsus" (I, MZUSP 30717), both adult males. Scale = 2 mm; J–K Anterior view of humerus in "large microtarsus" (J, MZUSP 30641) and "small microtarsus" (K, MZUSP 29161), showing variation in deltoid tuber (dt) and medial epicondyle (me) in adult males. Scale = 2 mm; L–M Lateral view of the carpus, manus, radius, and ulna in Gracilinanus microtarsus showing differences on radius crest (rc). Specimens of "large microtarsus" (L, MZUSP 30717) and "small microtarsus" (M, MZUSP 31009), both adult males. Scale = 2 mm.