Tseng et al 2016 connect Smilodon to Kolponomos
Here’s a YouTube video
PaleoTalks episode 14 featuring author Z Jack Tseng talking about Kolponomus (Fig 1), portrayed as a sea-otter/bear with certain affinities to Smilodon, the sabertooth (Fig 2).
This followed the publication of Tseng, Grohé and Flynn 2016, “Unique feeding strategy of the extinct marine mammal Kolponomos: convergence on sabretooths and sea otters.”
Figure 1. Five frames comparing taxa to scale, including Smilodon, Kolponomos, Haplophoneus, Tremarctos and Machaeroides.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/07/kolponomos-smilodon.skull_.588-1.gif?w=155″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/07/kolponomos-smilodon.skull_.588-1.gif?w=530″ tabindex=”0″ role=”button” class=”size-full wp-image-87442″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/07/kolponomos-smilodon.skull_.588-1.gif” alt=”Figure 1. Five frames comparing taxa to scale, including Smilodon, Kolponomos, Haplophoneus, Tremarctos and Machaeroides.” width=”584″ height=”1129″ />
Figure 1. Five frames comparing taxa to scale, including Smilodon, Kolponomos, Haplophoneus, Tremarctos and Machaeroides.
In the LRT
(Fig 3) Kolponomos nests with Smilodon (Fig 1) and these two apart from cats.
This image (Fig 2) appears in the video illustrating the Kolponomos link to Smilodon.
Figure 2. Image from PaleoTalks YouTube video comparing Smilodon to Kolponomos.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/07/kolponomus.smilodon.youtube.frame588.jpg?w=300″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/07/kolponomus.smilodon.youtube.frame588.jpg?w=584″ tabindex=”0″ role=”button” class=”size-full wp-image-87404″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/07/kolponomus.smilodon.youtube.frame588.jpg” alt=”Figure 2. Image from PaleoTalks YouTube video comparing Smilodon to Kolponomos. ” width=”584″ height=”409″ />
Figure 2. Image from PaleoTalks YouTube video comparing Smilodon to Kolponomos. Note the rostrum is absent due to taphonomy in Kolponomos.
Kolponomos newportensis
(Stirton 1960, Tedford, Barnes and Ray 1994, early Miocene) originally considered a bear close to pinnipeds, Kolponomus enters the LRT close to the South American bear, Tremarctos, but closer to Smilodon, the sabertooth. A few postcranial bones are known indicating this taxon was amphibious, but not a strong swimmer. Reports indicate the snout was adapted to prying shellfish off rocky substrates and massive molars were able to crush the shells, like a walrus.
Figure 3. Subset of the LRT focusing on Carnivora. Color highlights house cats apart from sabertooths and lions.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/07/carnivora2024.jpg?w=98″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/07/carnivora2024.jpg?w=334″ tabindex=”0″ role=”button” class=”size-full wp-image-87444″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/07/carnivora2024.jpg” alt=”Figure 3. Subset of the LRT focusing on Carnivora. Color highlights house cats apart from sabertooths and lions. ” width=”584″ height=”1792″ />
Figure 3. Subset of the LRT focusing on Carnivora. Color highlights house cats apart from sabertooths and lions.
As usual,
this is a hypothesis of interrelationships, and a fragile one at that. It requires confirmation, refutation or modification with a similar taxon list and your own character list. I may be the one to move things around as time goes by. That’s been the pattern of the recent past.
References
Stirton RA 1960. A Marine Carnivore from the Clallam Miocene Formation, Washington: Its Correlation with Nonmarine Faunas. University of California Publications in Geological Sciences. 36 (7).
Tedford RH, Barnes LG and Ray CE 1994. The early Miocene littoral ursoid carnivoran Kolponomos: Systematics and mode of life (PDF). Proceedings of the San Diego Society of Natural History. 29: 11–32.
Tseng ZJ, Grohé C and Flynn JJ 2016. A unique feeding strategy of the extinct marine mammal Kolponomos: convergence on sabretooths and sea otters. Proceedings of the Royal Society B https://doi.org/10.1098/rspb.2016.0044
wiki/Smilodon
wiki/Machaeroides
wiki/Hoplophoneus
wiki/Kolponomos
Source: https://pterosaurheresies.wordpress.com/2024/07/12/tseng-et-al-2016-connect-smilodon-to-kolponomos/
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