Adult vs immature Nandinia skulls
Like archosaurs
mammals experience allometry during ontogeny = they change proportions as they mature. This is distinct from lepidosaurs (including pterosaurs).
Figure 7. Extant relatives of Eoacrtos include Lemur, Nasua and Nandinia.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2023/06/coatimundi_lemur_palmcivet_invivo588.jpg?w=236″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2023/06/coatimundi_lemur_palmcivet_invivo588.jpg?w=584″ tabindex=”0″ role=”button” class=”size-full wp-image-78754″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2023/06/coatimundi_lemur_palmcivet_invivo588.jpg” alt=”Figure 7. Extant relatives of Eoacrtos include Lemur, Nasua and Nandinia.” width=”584″ height=”742″ />
Figure 1 Basal placentals include Lemur, Nasua and Nandinia.
Like other mammals,
the palm civet, Nandinia (Figs 1, 2), demonstrates this allometry. Babies have cute features and fewer smaller teeth, as in humans and dogs = puppies. See how many scoring changes you can find between the immature and fully mature Nandinia skulls (Fig 2).
Figure 1. Immature Nandinia skull compared (not to scale) with fully mature Nandinia skull. These two would score as distinct taxa in the LRT given their many changes.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/07/nandinia_skull733.jpg?w=286″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/07/nandinia_skull733.jpg?w=584″ tabindex=”0″ role=”button” class=”size-full wp-image-87630″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/07/nandinia_skull733.jpg” alt=”Figure 1. Immature Nandinia skull compared (not to scale) with fully mature Nandinia skull. These two would score as distinct taxa in the LRT given their many changes.” width=”584″ height=”612″ />
Figure 1. Immature Nandinia skull compared (not to scale) with fully mature Nandinia skull. These two would score as distinct taxa in the LRT given their many changes.
References
Wible JR and Spaulding M 2013. On the cranial osteology of the African palm civet, Nandinia binotata (gray 1830) (Mammalia, Carnivora, Feliforma). Annals of Carnegie Museum 82(1):1–114.
Source: https://pterosaurheresies.wordpress.com/2024/07/19/adult-vs-immature-nandinia-skulls/
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