Kinkajous vs primates vs otters
According to Wikipedia – Kinkajou,
“The kinkajou resembles neotropical monkeys in having a prehensile tail and big, forward-facing eyes, but has a different dentition and heavy fur on the soles of the feet.”
To that resemblance
the Middle Eocene primate from Texas, Smilodectes (Fig 1), shares a long list of skull traits with the extnt kinkajou, Potos (Fig 1).
As noted by Wikipedia, and confirmed by the LRT, similarities are by convergence,
Figure 1. Smilodeces diagram compared to photos of male and female Potos (kinkajous).
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/09/potos-smilodectes588.jpg?w=222″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/09/potos-smilodectes588.jpg?w=584″ tabindex=”0″ role=”button” class=”size-full wp-image-88620″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/09/potos-smilodectes588.jpg” alt=”Figure 1. Smilodeces diagram compared to photos of male and female Potos (kinkajous). ” width=”584″ height=”791″ />
Figure 1. Smilodeces diagram compared to photos of male and female Potos (kinkajous) to scale. The similarity is clear, but convergent.
Closer relative to the kinkajou, Potos
(Fig 2), according to the LRT, include bears, weasels and otters, like Lontra (Fig 2) sporting lower longer skulls.
Figure 2. Arboreal Potos compared to aquatic Lontra.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/09/potos-lontra588.jpg?w=111″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/09/potos-lontra588.jpg?w=380″ tabindex=”0″ role=”button” class=”size-full wp-image-88622″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/09/potos-lontra588.jpg” alt=”Figure 2. Arboreal Potos compared to aquatic Lontra. ” width=”584″ height=”1573″ />
Figure 2. Arboreal Potos compared to aquatic Lontra.
Lontra canadensis
(von Schreber 1777, Gray 1843; 84cm in length) is the extant river otter, nesting between the mink and sea otter.
Smilodectes gracilis
(Wortman 1903; Middle Eocene, North America, 55mya, 27cm snout-vent length) is traditionally considered an adapid (lemur-sister) primate. Here it is transitional to higher New World monkeys, tarsiers, Old World monkeys and apes, in that order. It is derived from a sister to Notharctus.
Potos flavus
(von Schreber 1774) is the extant kinkajou a tropical American relative of the North American raccoon. This fruit-eater has flat molars and a short, primate like muzzle. The tail is prehensile.
At present
the prehensile tail evolved several times by convergence and was lost just as often, again by convergence.
References
von Schreber JCD 1774. Die Säugethiere vol.1 9 p.pl. 42
von Schreber JCD 1777. Die Säugethiere, 3(18): pl. 126.B, see also text:3(26):457–588.
Wortman JL 1903. Studies of Eocene Mammalia in the Marsh Collection, Peabody Museum. Part II. Primates. Suborder Cheiromyoidea. The American Journal of Science, series 4 16:345-368.
wiki/Smilodectes
wiki/Lontra
wiki/Kinkajou
Source: https://pterosaurheresies.wordpress.com/2024/09/07/kinkajous-vs-primates-vs-otters/
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