Achaenodon and Prodinoceras now linked in the LRT
A couple of traditonal condylarths,
Achaenodon and Prodinoceras (Fig 1) are here compared to scale to illustrate their similarities. These were overlooked until recently when more focus finally came to these two taxa in the large reptile tree (LRT, 2338 taxa).
Figure 1. Achaenodon and Prodinoceras aligned in two frames to scale with DGS colors added here.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/05/achaenodon_prodinoceras588.gif?w=300″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/05/achaenodon_prodinoceras588.gif?w=584″ class=”size-full wp-image-92826″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/05/achaenodon_prodinoceras588.gif” alt=”Figure 1. Achaenodon and Prodinoceras aligned in two frames to scale with DGS colors added here. ” width=”584″ height=”508″ srcset=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/05/achaenodon_prodinoceras588.gif?w=584&h=508 584w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/05/achaenodon_prodinoceras588.gif?w=150&h=130 150w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/05/achaenodon_prodinoceras588.gif?w=300&h=261 300w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/05/achaenodon_prodinoceras588.gif 588w” sizes=”(max-width: 584px) 100vw, 584px” />
Figure 1. Achaenodon and Prodinoceras aligned in two frames to scale with DGS colors added here. In Achaenodon the disappearing teeth in frame 3 where shown originally as dotted lines in the line drawing, omitted in the tonal rendering at right.
Apparently this is a novel hypothesis of interrelationships.
If not, please provide a citation so I can promote it here.
References
Cope ED 1882a. Contributions to the history of the Vertebrata of the lower Eocene of Wyoming and New Mexico, made during 1881. Proceedings of the American Philosophical Society: 139-197.
Cope ED 1882e. Note on Eocene Mammalia. American Naturalist 16:522.
Flerov KK 1952. Novye Dinocerata iz Mongolii (New Dinocerata from Mongolia). Doklady Akademii Nauk SSSR 86, 1029-32.
Granger W 1915. A revision of the lower Wasatch and Wind River faunas, Part III: Order Condylarthra, families Phenacodontidae and Meniscotheriidae. Bulletin of the American Museum of Natural History 34:329-361.
Kondrashov P and Agadjanian AK 2012. A nearly complete skeleton of Ernanodon (Mammalia, Palaeanodonta) from Mongolia: morphofunctional analysis. Journal of Vertebrate Paleontology. 32 (5): 983–1001.
Matthew WD, Granger W and Simpson GG 1929. Additions to the fauna of the Gashato Formation of Mongolia. American Museum Noviates 376: 1–12.
Piveteau J (ed.) 1961 Traité de Paléontologie. Tome VI: L’origine des mammifères et les aspects fondamentaux de leur évolution.
Robinet et al. 2015. A new genus of Lophiodontidae (Perissodactyla, Mammalia) from the early Eocene of La Borie (Southern France) and the origin of the genus Lophiodon Cuvier, 1822. Geobios 48 (2015) 25–38.
Shaw BJ. 2010. The enigmatic anteaters, sloths, and armadillos: elucidating evolutionary relationships among xenarthran families, Ernanodon antelios, and remaining mammals. Dissertation. Portland State University.
wiki/Ectocion
wiki/Prodinoceas
wiki/Eolophiodon – not yet posted
Source: https://pterosaurheresies.wordpress.com/2025/05/17/achaenodon-and-prodinoceras-now-linked-in-the-lrt/
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