Quantitative Analyses of Feliform Humeri Reveal the Existence of a Very Large Cat in North America During the Miocene

Orcutt, John D.; Calede, Jonathan J.

doi:10.1007/s10914-021-09540-1

Cited by 4 publications

(4 citation statements)

References 61 publications

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“…Remarks.-UOMNH F-29959 marks the first published occurrence of the genus in Oregon and the Pacific Northwest, as well as west of the Rocky Mountains. When the length and width of the specimen are compared to mean values for previously described species (Table 3), this tooth is not consistent with Pseudhipparion skinneri Webb and Hulbert, Shotwell (1956Shotwell ( , 1958Shotwell ( , 1967a in his initial work on the locality, by subsequent authors (Lindsay, 1962;Hutchison, 1968;Wagner, 1976;Harrison, 1981;Martin, 1984Martin, , 1998Korth, 1999;Prothero, 2005;Orcutt and Calede, 2021), and in this paper are shown. X, the original taxonomic assignment is still valid; O, taxonomy has been updated since its original description; ?, taxonomic assignment uncertain; -, not applicable.…”

Section: Systematic Paleontologycontrasting

confidence: 50%

“…The rhinocerotid Teleoceras Hatcher, 1894 is particularly abundant (Shotwell, 1956) and the site has also *Corresponding author. yielded a diversity of carnivoran fossils, including borophagine (Wang et al, 1999) and canine canids (Tedford et al, 2009) and the giant felid Machairodus lahayishupup Orcutt and Calede, 2021 (Orcutt and Calede, 2021). The exceptional completeness of the fossil record from McKay Reservoir has made it a major focus of paleobiological research.…”

Section: Introductionmentioning

confidence: 99%

“…Shotwell (1955a) argued that the taphonomy of the McKay Reservoir fossils indicated a pondbank environment and built on this by including the McKay Reservoir fauna in a pioneering analysis of landscape paleoecology in the Columbia River Basin (Shotwell, 1958). The site's continuing importance as a paleobiological study system is underscored by the many subsequent studies incorporating McKay Reservoir fossils to address questions regarding mammalian body-size evolution (Orcutt andHopkins, 2013, 2016), morphological variation in mylagaulid rodents (Calede and Hopkins, 2012), the biogeography of arvicoline rodents (Martin, 2010), the origin of sigmodontine rodents (Ronez et al, 2021), rhinocerotid paleopathology (Stilson et al, 2016), and felid functional morphology and systematics (Orcutt and Calede, 2021). As extensively and intensely as it has been studied, the McKay Reservoir faunal list continues to grow, due to taxonomic revisions, to previously described taxa, and to new collections made by Gonzaga University field crews in 2017 and 2021.…”

Section: Introductionmentioning

confidence: 99%

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New occurrences of mammals from McKay Reservoir (Hemphillian, Oregon)

Orcutt,

Schmer,

Lubisich

et al. 2024

J. Paleontol.

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Encompassing global cooling, the spread of grasslands, and biogeographic interchanges, the Hemphillian North American Land Mammal Age is an important interval for understanding the factors driving ecological and evolutionary change through time. McKay Reservoir near Pendleton, Oregon is a natural laboratory for analyses of these factors. It is remarkable for its small vertebrate fauna including rodents, bats, turtles, and lagomorphs, but also for its larger mammal fossils like camelids, rhinocerotids, canids, and felids. Despite the importance of the site, few revisions to its faunal list have been published since its original description. We expand on this description by identifying taxa not previously known from McKay Reservoir based on specimens collected during fieldwork and through reidentification of previously collected fossils. Newly identified taxa include the borophagine canid Borophagus secundus (Matthew and Cook, 1909), the camelids Megatylopus Matthew and Cook, 1909 and Pleiolama Webb and Meachen, 2004, a dromomerycid, and the equids Cormohipparion Skinner and MacFadden, 1977 and Pseudhipparion Ameghino, 1904. Specimens previously assigned to Neohipparion Gidley, 1903 and Hipparion de Christol, 1832 lack the features necessary to diagnose these genera, which are therefore removed from the site's faunal list. The presence of Borophagus secundus, Cormohipparion, and Pseudhipparion is especially important, because each occurrence represents a major geographic range extension. This refined understanding of the fauna lays the foundation for future studies of taphonomy, taxonomy, functional morphology, and paleoecology—potentially at the population, community, or ecosystem levels—at this paleobiologically significant Miocene locality.

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Section: Systematic Paleontologycontrasting

confidence: 50%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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New occurrences of mammals from McKay Reservoir (Hemphillian, Oregon)

Orcutt,

Schmer,

Lubisich

et al. 2024

J. Paleontol.

Self Cite

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“…56 Some recent found from Idaho, Oregon, and Texas were erected as a new species Machairodus lahayishupup of huge size. 57 The dental differences they listed from those of N. catocopis are only intraspecific variation when taking into account the large collection analyzed here, though the humerus is indeed much larger than the humeri we observed. We propose this form is more likely to be local subspecies of N. catocopis lahayishupup , of very large body size in southwestern America.…”

Section: Discussionmentioning

confidence: 45%