The first Paleogene mustelid (mammalia, Carnivora) from southern North America and its paleontologic significance

Ferrusquía-Villafranca, Ismael; Wang, Xiaoming

doi:10.1016/j.jsames.2021.103236

Cited by 6 publications

(2 citation statements)

References 25 publications

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“…However, in recent years, new data from early musteloids are entering into the discussion from the North American record. These new records, such as Corumictis wolsani Paterson et al (2020b) and Oaxacagale ruizi Ferrusiquía-Vallafranca and Wang (2021), show that North America is perhaps equally important in our understanding of early arctoid divergence. Clark, 1936 Type Species-Mustelavus priscus Clark, 1936.…”

Section: Superfamily Musteloidea Fischer Von Waldheim 1817mentioning

confidence: 89%

“…Most recently, Paterson et al (2020b) described a new genus, Corumictis , from John Day, Oregon based on an excellently preserved skull, showing that North America also played a role in early diversification during the middle Oligocene. Another tantalizing discovery is the recent description of Oaxacagale from southern Mexico, which can be as old as Eocene, but the preservation of its holotype is less than optimal (Ferrusquía-Villafranca and Wang, 2021).…”

Section: Discussionmentioning

confidence: 99%

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An exquisitely preserved skeleton of Eoarctos vorax (nov. gen. et sp.) from Fitterer Ranch, North Dakota (early Oligocene) and systematics and phylogeny of North American early arctoids (Carnivora, Caniformia)

Wang

Emry

Boyd

et al. 2022

Journal of Vertebrate Paleontology

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An exquisitely preserved male skeleton of an early arctoid, Eoarctos vorax new genus and species, provides a unique window into the origin and early divergence of Carnivora. Recovered from the Fitterer Ranch locality in the early Oligocene (Orellan to Whitneyan North American Land Mammal ages) Brule Formation of southwestern North Dakota (∼32 Ma), the new arctoid offers an opportunity to evaluate the fundamental relationships of the caniform (dog-like) carnivorans. Eoarctos vorax possesses a suite of plesiomorphic characters inherited from its miacid ancestors, making it an ideal model for ancestral arctoids. We present a comprehensive treatment of E. vorax, combining traditional description with photographic documentation, microCT, laser scans, and photogrammetry. Showing its plesiomorphic morphology, Eoarctos vorax is scansorial, somewhat like a modern raccoon, retaining the ability to climb trees and lacking cursorial adaptations present in the early canid Hesperocyon. However, E. vorax shows clear signs of durophagous cranio-dental morphology, presumably for an obligatory diet of mollusks, with frequent damage to shell-crushing premolars, plus associated dental infections. We review several other key North American early arctoids and present total-evidence (nuclear DNA and discrete morphological characters) Bayesian and parsimony analyses of Caniformia phylogeny, including extinct stem taxa plus a living member of all modern families. We recognize an endemic North American ursoid clade, Subparictidae, which includes Eoarctos vorax. We demonstrate the importance of North America as an early cradle of evolution for caniform carnivorans, including early precursors of Canidae, Amphicyonidae, Ursidae, and Pinnipedia. http://zoobank.org/urn:lsid:zoobank.org:pub:86C85C7A-9DDF-410E-ACA6-F5B913093E2D SUPPLEMENTARY FILES-Supplementary files are available for this article for free at www.tandfonline.com/UJVP.

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Section: Superfamily Musteloidea Fischer Von Waldheim 1817mentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%