Figure 2.

Pelves of selected mammal species. Males on the left, females on the right. Collection numbers are given. A, Choloepus hoffmanni (Hoffmann's two‐toed sloth, Xenarthra: Pilosa), NMW 31566 and NMW 3996. B, Macropus rufus (Red kangaroo, Marsupialia: Diprotodontia), NMW 22717 and NMW 22747. C, Nyctalus noctula (Common noctule, Laurasiatheria: Chiroptera), NMW 42194 and NMW 36120. D, Rousettus aegyptiacus (Egyptian fruit bat, Laurasiatheria: Chiroptera), NMW 20840 and NMW 20834. E, Erinaceus roumanicus (Northern white‐breasted hedgehog, Laurasiatheria: Eulipotyphla), NMW 20153 and NMW 968. F, Acinonyx jubatus (Cheetah, Laurasiatheria: Carnivora), NMW 72724 and NMW 70616. G and H, Rangifer tarandus (Reindeer, Laurasiatheria: Cetartiodactyla), male (G) and female (H), NMW 69121 and NMW 68134. For photographs of pelves of additional mammalian taxa, see Supporting Information