FIG. 68 in Model-based analysis of postcranial osteology of marsupials from the Palaeocene of Itaboraí (Brazil) and the phylogenetics and biogeography of Metatheria

FIG. 68. — Comparisons of the distal end and head of the left humeri of the five extant didelphid species (A-E) with known habitus and the seven Itaboraí humeral groups (F-L); A, D. gliroides; B, R. raphanurus; C, M. domestica; D, C. derbianus; E, M. nudicaudatus. The drawings were prepared so that the distal width of the humerus was kept (approximately) constant, and the size of the head was then drawn at the same scale as the distal end of the same humerus. Anterior is toward the top of the page for the distal ends. From top to bottom, the size of the humeral groups (and possibly the body size as well) increases. Arrows point to the posterior and lateral extension of the curved (to various degrees) facet for the ulna. Scale bars: 2 mm.