From: Homeotic transformations reflect departure from the mammalian ‘rule of seven’ cervical vertebrae in sloths: inferences on the Hox code and morphological modularity of the mammalian neck
Taxon
# Cervical vertebrae
Collection number
Choloepus cf. didactylus 1
6
ZMB_MAM_102634
Choloepus didactylus 2
7
ZMB_MAM_38388
Bradypus variegatus
9
ZMB_MAM_35824
Bradypus tridactylus
ZMB_MAM_76147