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Fig. 6 | BMC Evolutionary Biology

Fig. 6

From: Oldest ctenodactyloid tarsals from the Eocene of China and evolution of locomotor adaptations in early rodents

Fig. 6

Comparative morphology of the astragalus (right). Tamquammys robustus (a) IVPP V24136.4; (b) T. wilsoni, IVPP V24137.5 (mirror image); extant rodents: Rattus norvegicus (c), Cricetus cricetus (d), Glis glis (e), Marmota marmota (f), Sciurotamias davidianus (g), Ondatra zibethicus (h). Note a relatively deep trochlea and long erect neck, both indicators of improved orthal movement

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