Mcdonaldocnus

Mcdonaldocnus; Temporal range: Middle Miocene-Early Pliocene (Friasian-Montehermosan); ~16.3–5.3 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Pilosa
Family:	†Nothrotheriidae
Subfamily:	†Nothrotheriinae
Genus:	†Mcdonaldocnus; Gaudin et al. 2022
Type species
	†Mcdonaldocnus bondesioi; (Scillato-Yané 1979)
Synonyms
	Xyophorus bondesioi Scillato-Yané 1979

Mcdonaldocnus is an extinct genus of nothrotheriid ground sloths that lived during the Middle Miocene and Early Pliocene of what is now Bolivia and Argentina. It was originally placed in the genus Xyophorus but was subsequently recognized as a distinct genus by Gaudin and colleagues in 2022.^[1] The authors reassigned the material of "Xyophorus" bondesioi, Xyophorus villarroeli and Xyophorus sp. to Mcdonaldocnus.^[2]^[3]^[4] Fossils of Mcdonaldocnus have been found in the Cerro Azul Formation of Argentina.^[5]

Etymology

The genus name, Mcdonaldocnus, is composed of the prefix Mcdonald-, which honors the retired U.S. Bureau of Land Management scientist Dr. H. Gregory McDonald, a notable sloth specialist, and the greek suffix -ocnus, meaning "hesitating or inactive", which is commonly used to name extinct sloths. The species name, Mcdonaldocnus bondesioi, honors the paleontologist Pedro Bondesio^[1]

References

^ ^a ^b Gaudin, T. J.; Boscaini, A.; Mamani Quispe, B.; Andrade Flores, R.; Fernández-Monescillo, M.; Marivaux, L.; Antoine, P.-O.; Münch, P.; Pujos, F. (2022). "Recognition of a new nothrotheriid genus (Mammalia, Folivora) from the early late Miocene of Achiri (Bolivia) and the taxonomic status of the genus Xyophorus" (PDF). Historical Biology: An International Journal of Paleobiology. 35 (6): 1041–1051. doi:10.1080/08912963.2022.2075744. S2CID 258688117.
^ Brandoni, Diego; Ruiz, Laureano González; Reato, Agustina; Martin, Gabriel (2017). "Chronological implications of the nothrotheriid 'Xyophorus' (Mammalia, Xenarthra) from the Collón Curá Formation (Miocene of Patagonia, Argentina)". Historical Biology. 31 (7): 879. doi:10.1080/08912963.2017.1398748. hdl:11336/41406. ISSN 0891-2963. S2CID 135166637.
^ Croft, Darin Andrew; Anaya, Federico; Auerbach, David; Garzione, Carmala; MacFadden, Bruce J. (2009-09-01). "New Data on Miocene Neotropical Provinciality from Cerdas, Bolivia". Journal of Mammalian Evolution. 16 (3): 175–198. doi:10.1007/s10914-009-9115-0. ISSN 1573-7055. S2CID 16210582.
^ Brandoni, Diego (April 2014). ""Xyophorus" sp. en El Mioceno Medio de Chubut: Implicancias Sistemáticas, Biogeográficas y Biocronológicas Del Registro de un Nothrotheriinae en el Neógeno de la Argentina". Ameghiniana. 51 (2): 94–105. doi:10.5710/AMEGH.05.12.2013.1267. hdl:11336/12077. ISSN 0002-7014. S2CID 128398877.
^ Miño-Boilini, Ángel R.; Brandoni, Diego; Montalvo, Claudia I.; Tomassini, Rodrigo L.; Barasoain, Daniel; Zurita, Alfredo E. (2022-07-15). "New cranio-dental remains of Nothrotheriinae (Mammalia, Xenarthra, Folivora) from the Late Miocene of Central Argentina". Historical Biology. 35 (8): 1435–1443. doi:10.1080/08912963.2022.2098021. ISSN 0891-2963. S2CID 250598345.

[:0-1] Gaudin, T. J.; Boscaini, A.; Mamani Quispe, B.; Andrade Flores, R.; Fernández-Monescillo, M.; Marivaux, L.; Antoine, P.-O.; Münch, P.; Pujos, F. (2022). "Recognition of a new nothrotheriid genus (Mammalia, Folivora) from the early late Miocene of Achiri (Bolivia) and the taxonomic status of the genus Xyophorus" (PDF). Historical Biology: An International Journal of Paleobiology. 35 (6): 1041–1051. doi:10.1080/08912963.2022.2075744. S2CID 258688117.

[2] Brandoni, Diego; Ruiz, Laureano González; Reato, Agustina; Martin, Gabriel (2017). "Chronological implications of the nothrotheriid 'Xyophorus' (Mammalia, Xenarthra) from the Collón Curá Formation (Miocene of Patagonia, Argentina)". Historical Biology. 31 (7): 879. doi:10.1080/08912963.2017.1398748. hdl:11336/41406. ISSN 0891-2963. S2CID 135166637.

[3] Croft, Darin Andrew; Anaya, Federico; Auerbach, David; Garzione, Carmala; MacFadden, Bruce J. (2009-09-01). "New Data on Miocene Neotropical Provinciality from Cerdas, Bolivia". Journal of Mammalian Evolution. 16 (3): 175–198. doi:10.1007/s10914-009-9115-0. ISSN 1573-7055. S2CID 16210582.

[4] Brandoni, Diego (April 2014). ""Xyophorus" sp. en El Mioceno Medio de Chubut: Implicancias Sistemáticas, Biogeográficas y Biocronológicas Del Registro de un Nothrotheriinae en el Neógeno de la Argentina". Ameghiniana. 51 (2): 94–105. doi:10.5710/AMEGH.05.12.2013.1267. hdl:11336/12077. ISSN 0002-7014. S2CID 128398877.

[5] Miño-Boilini, Ángel R.; Brandoni, Diego; Montalvo, Claudia I.; Tomassini, Rodrigo L.; Barasoain, Daniel; Zurita, Alfredo E. (2022-07-15). "New cranio-dental remains of Nothrotheriinae (Mammalia, Xenarthra, Folivora) from the Late Miocene of Central Argentina". Historical Biology. 35 (8): 1435–1443. doi:10.1080/08912963.2022.2098021. ISSN 0891-2963. S2CID 250598345.

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