Remingtonocetus: getting back to basics = away from restoration mistakes
Figure 1. Remingtonocetus specimen with post-crania.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/11/remingtonocetus.postcrania588.jpg?w=82″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/11/remingtonocetus.postcrania588.jpg?w=281″ class=”size-full wp-image-90012″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/11/remingtonocetus.postcrania588.jpg” alt=”Figure 1. Remingtonocetus specimen with post-crania.” width=”335″ height=”1219″ srcset=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/11/remingtonocetus.postcrania588.jpg 335w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/11/remingtonocetus.postcrania588.jpg?w=41&h=150 41w” sizes=”(max-width: 335px) 100vw, 335px” />
Figure 1. Remingtonocetus specimen with post-crania.
Long-snouted Remingtonocetus
(Fig 1) is traditionally considered one of the many ‘walking whales.” That means this genus is in the lineage of archaeocetes and odontocetes in the large reptile tree (LRT, 2327 taxa).
Unfortunately,
earlier scoring for Remingtonocetus was based on a restoration with a postorbital bar not found in any related taxon.
Also, earlier scores
did not have the benefit of the post-cranial data (Fig 1).
Getting back to
original drawings and studies (Fig 1) resolved all problems.
Now in the LRT
Remingtonocetus nests with Phiomicetus between smaller taxa like Leptictidium + Indohyus and another walking whale with a retracted naris, Georgiacetus.
Remingtonocetus harudiensis
(Kumar and Sahni 1986 originally Protocetus harudiensis Sahni and Mishra 1975; Bebej 2011, middle Eocene) nests with Phiomicetus in the LRT. And these two taxa are derived from extant short-tailed tenrecs, like Hemicentetes, and extinct long-tailed Leptictidium and Indohyus.
As the LRT recovered
earlier, mysticetes arose separately and far from odontocetes.
References
Bebej RM 2011. Functional Morphology of the Vertebral Column in Remingtonocetus
(Mammalia, Cetacea) and the Evolution of Aquatic Locomotion in Early Archaeocetes. PhD thesis U of Michigan.
Kumar K and Sahni A 1986. Remingtonocetus harudiensis, new combination, a middle Eocene archaeocete (Mammalia, Cetacea) from western Kutch, India”. Journal of Vertebrate Paleontology. 6 (4): 326–349.
wiki/Pakicetus
wiki/Ambulocetus
wiki/Rodhocetus
wiki/Remingtonocetus
wiki/Georgiacetus
wiki/evoution of cetaceans (whales)
Whale papers by P. Gingerich
The Triple Origin of Whales – Peters 2018
Source: https://pterosaurheresies.wordpress.com/2024/11/25/remingtonocetus-getting-back-to-basics-away-from-restoration-mistakes/
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