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Polydolopimorphia

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Polydolopimorphia
Temporal range:Paleocene–Pliocene,66–2.6 Ma
Argyrolaguspalmeri
Scientific classificationEdit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Clade: Metatheria
Clade: Marsupialiformes
Order: †Polydolopimorphia
Archer, 1984
Subgroups

Polydolopimorphiais an extinct order ofmetatherians,closely related to extantmarsupials.Known from thePaleocene-PlioceneofSouth Americaand theEoceneofAntarctica,they were a diverse group during the Paleogene, filling many niches, before declining and becoming extinct at the end of theNeogene.[1]It is divided into two suborders, Bonapartheriiformes, and Polydolopiformes[2]Most members are only known from jaw fragments, which have their characteristically generallybunodontteeth.[3]The morphology of their teeth has led to proposals that polydolopimorphians may be crown group marsupials, nested withinAustralidelphia,[4]though this proposal, has been questioned, with other analyses finding them outside of crown-group Marsupialia.[3]Themonophylyof the group has been questioned, due to the possibility of the characteristic bunodont teeth emergingconvergentlyin unrelated groups, rather than reflecting a truephylogeneticrelationship.[5]The group containedomnivorous,frugivorousandherbivorousforms.[4]

Taxonomy

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Taxonomical subdivision of the Polydolopimorphia:[6]

References

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  1. ^Beck, Robin M. D. (2016)."The Skull of Epidolops ameghinoi from the Early Eocene Itaboraí Fauna, Southeastern Brazil, and the Affinities of the Extinct Marsupialiform Order Polydolopimorphia".Journal of Mammalian Evolution.24(4): 373–414.doi:10.1007/s10914-016-9357-6.ISSN1064-7554.PMC5684316.PMID29187780.
  2. ^Chornogubsky, Laura; Goin, Francisco J. (2015). "A review of the molar morphology and phylogenetic affinities of Sillustania quechuense(Metatheria, Polydolopimorphia, Sillustaniidae), from the early Paleogene of Laguna Umayo, southeastern Peru".Journal of Vertebrate Paleontology.35(6): e983238.doi:10.1080/02724634.2015.983238.hdl:11336/46844.ISSN0272-4634.S2CID86106580.
  3. ^abBeck, Robin M. D. (2023), Cáceres, Nilton C.; Dickman, Christopher R. (eds.),"Diversity and Phylogeny of Marsupials and Their Stem Relatives (Metatheria)",American and Australasian Marsupials,Cham: Springer International Publishing, pp. 1–66,doi:10.1007/978-3-030-88800-8_35-1,ISBN978-3-030-88800-8,retrieved2023-05-14
  4. ^abGoin, Francisco J.; Woodburne, Michael O.; Zimicz, Ana Natalia; Martin, Gabriel M.; Chornogubsky, Laura (2016),"Phylogeny and Diversity of South American Metatherians",A Brief History of South American Metatherians,Dordrecht: Springer Netherlands, pp. 155–183,doi:10.1007/978-94-017-7420-8_5,ISBN978-94-017-7418-5,retrieved2022-02-19
  5. ^Beck, Robin M. D. (2023), Cáceres, Nilton C.; Dickman, Christopher R. (eds.),"Diversity and Phylogeny of Marsupials and Their Stem Relatives (Metatheria)",American and Australasian Marsupials,Cham: Springer International Publishing, pp. 1–66,doi:10.1007/978-3-030-88800-8_35-1,ISBN978-3-030-88800-8,retrieved2024-04-16
  6. ^PolydolopimorphiaatFossilworks.org
  7. ^Laura Chornogubsky (2021)."Interrelationships of Polydolopidae (Mammalia: Marsupialia) from South America and Antarctica".Zoological Journal of the Linnean Society.192(4): 1195–1236.doi:10.1093/zoolinnean/zlaa143.hdl:11336/131166.Along with:
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