Ailuropodinae

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Ailuropodinae
Temporal range: Early Miocene–present
Giant panda (Ailuropoda melanoleuca)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Family: Ursidae
Subfamily: Ailuropodinae
Grevé, 1894
Tribes and genera

Ailuropodinae is a subfamily of

Holarctic, with species found in places such as Europe, much of Asia and even North America.[1][2][3][4] The earliest pandas were not unlike other modern bear species in that they had an omnivorous diet but by around 2.4 million years ago, pandas have evolved to be more herbivorous.[5][6]

Systematics

Ever since the giant panda was first described to science, they have been a source of taxonomic confusion, having been variously classified as a member of

Ursidae,[10][11][12] Ailuridae,[13] or even their own family Ailuropodidae.[14] Part of their similarities with the red panda is in particular the presence of a "thumb" and five fingers; the "thumb" – a modified sesamoid bone – that helps it to hold bamboo while eating.[15]

Recent genetic studies have shown that ailuropodines are indeed members of the bear family as they are not closely related to red pandas, which are placed in their own family Ailuridae.[16][17] Any similarities between ailuropodines and ailurids are likely due to convergent evolution as the fossil record has shown the "false thumb" has been required independently for different purposes.[18] The "false thumb" has been found in spectacled bears as well, suggesting that it is a plesiomorphic trait among bears that became lost in the Ursinae subfamily.[19]

Taxonomy

The ailuropodines are divided into two tribes the extinct

Ailuropodini
; the following taxonomy below is after Abella et al. (2012):

  • Subfamily Ailuropodinae Grevé, 1894[20]
    • Tribe †Agriotheriini Kretzoi, 1929[21]
      • ?†Miomaci de Bonis et al., 2017
        • Miomaci pannonicum de Bonis et al., 2017
      • Indarctos Pilgrim, 1913
        • Indarctos zdanskyi Qiu & Tedford, 2003[22]
        • Indarctos sinensis (Zdansky, 1924)
        • Indarctos vireti Villalta & Crusafont, 1943
        • Indarctos arctoides (Deperet, 1895)
        • Indarctos anthracitis (Weithofer, 1888)
        • Indarctos salmontanus Pilgrim, 1913
        • Indarctos atticus (Weithofer, 1888)
        • Indarctos bakalovi (Kovachev, 1988)
        • Indarctos lagrelli (Zdansky, 1924
        • Indarctos oregonensis Merriam et al., 1916
        • Indarctos nevadensis Macdonald, 1959[23]
      • Huracan Jiangzuo et al., 2023
        • Huracan? roblesi (Morales & Aguirre, 1976) [Agriotherium roblesi Morales & Aguirre, 1976]
        • Huracan? punjabensis (Lydekker, 1884) [Indarctos punjabensis (Lydekker, 1884)]
        • Huracan schneideri (Sellards, 1916)
        • Huracan coffeyi (Dalquest, 1986)
        • Huracan qiui Jiangzhou et al., 2023
      • Agriotherium Wagner, 1837
        • Agriotherium hendeyi Jiangzuo & Flynn, 2019
        • Agriotherium myanmarensis Ogino et al., 2011
        • Agriotherium insigne Gervais, 1859
        • Agriotherium inexpetans Qiu et al., 1991
        • Agriotherium palaeindicus Lydekker, 1878
        • Agriotherium sivalensis (Falconer & Cautley, 1836)
        • Agriotherium africanum Hendey, 1972
        • Agriotherium gregoryi Frick, 1926
    • Tribe Ailuropodini Grevé, 1894
      • Kretzoiarctos Abella et al., 2012
        • Kretzoiarctos beatrix Abella et al., 2011
      • Agriarctos Kretzoi, 1942[24]
        • Agriarctos depereti (Schlosser, 1902)
        • Agriarctos gaali Kretzoi, 1942
        • Agriarctos nikolovi Jiangzuo & Spassov, 2022
        • Agriarctos vighi Kretzoi, 1942
      • Ailurarctos Qi et al., 1989
        • Ailurarctos yuanmouensis Zong, 1997
        • Ailurarctos lufengensis Qi et al., 1989
      • Ailuropoda Milne-Edwards, 1870

References

  1. ^ Ginsburg, Léonard, and Jorge Morales. "Hemicyoninae (Ursidae, Carnivora, Mammalia) and the related taxa from Early and Middle Miocene of Western Europe." Annales de paleontologie. Vol. 1. No. 84. 1998.
  2. ^ Montoya, P., L. Alcalá, and Jorge Morales. Indarctos (Ursidae, Mammalia) from the Spanish Turolian (Upper Miocene). Nationaal Natuurhistorisch Museum, 2001.
  3. ^ Abella, J., Plinio Montoya, and J. Morales. "Una nueva especie de Agriarctos (Ailuropodinae, Ursidae, Carnivora) en la localidad de Nombrevilla 2 (Zaragoza, España)." Estudios Geológicos 67.2 (2011): 187-191.
  4. PMID 23155439
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  11. ^ O'Brien, S. J.; Eichelberger, M. A.; et al. (1984). "Constructing a molecular phylogeny of the giant panda (Ailuropoda melanoleuca)". Bongo. 10. Berlin: Proceedings of the International Symposium on Giant Panda: 175–182.
  12. PMID 18254792
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  14. ISSN 0044-3468. Archived from the original on 29 May 2023. Retrieved 29 May 2023.{{cite journal}}: CS1 maint: bot: original URL status unknown (link
    )
  15. ^ Morris, Paul; Susan F. Morris. "The Panda's Thumb". Athro Limited. Retrieved 7 August 2010.
  16. ^ Peng, Rui, et al. "The complete mitochondrial genome and phylogenetic analysis of the giant panda (Ailuropoda melanoleuca)." Gene 397.1 (2007): 76-83.
  17. ^ Sato, Jun J., et al. "Deciphering and dating the red panda’s ancestry and early adaptive radiation of Musteloidea." Molecular Phylogenetics and Evolution 53.3 (2009): 907-922.
  18. ^ Salesa, Manuel J., et al. "Evidence of a false thumb in a fossil carnivore clarifies the evolution of pandas." Proceedings of the National Academy of Sciences of the United States of America 103.2 (2006): 379-382.
  19. ^ Salesa, Manuel J., et al. "Anatomy of the “false thumb” of Tremarctos ornatus (Carnivora, Ursidae, Tremarctinae): phylogenetic and functional implications." (2006).
  20. PMID 23155439
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  22. ^ Qiu, Zhan-Xiang; Tedford, R. H. (2003). "Shānxī bǎo dé yìndù xióngyīxīn zhǒng" 山西保德印度熊一新种 [A New Species of *Indarctos* from Baode, China] (PDF). Vertebrata PalAsiatica. 41 (4): 278–288.
  23. JSTOR 1300922
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  24. ^ Kretzoi, M. (1942). "Zwei neue Agriotheriiden aus dem ungarischen Pannon". Földtani Közlöny. 72: 350–353.