Guilielmofloweria
{{Short description|Extinct genus of litopterns}}
{{Speciesbox
| image=
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| fossil_range = Middle-Late Eocene (Mustersan-Divisaderan)
~{{fossil range|48|37}}
| genus = Guilielmofloweria
| species = plicata
| authority = Ameghino 1901
| parent_authority = Ameghino 1901
| subdivision_ranks =
| subdivision =
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Guilielmofloweria is an extinct genus of proterotheriid litoptern that lived from the Middle to Late Eocene of what is now Argentina. Fossils have been found in the Sarmiento Formation of Argentina.{{Cite journal |last=Cifelli |first=Richard |date=1985 |title=Biostratigraphy of the Casamayoran, Early Eocene of Patagonia. |url=https://digitallibrary.amnh.org/bitstream/handle/2246/5227/N2820.pdf?sequence=1&isAllowed=y |journal=American Museum Novitates}}
Taxonomy
Guilielmofloweria was first named in 1901 by Florentino Ameghino based on fragmentary remains found in the Sarmiento Formation of Argentina, in rocks dating back to the Middle Eocene.{{Cite book |last=Ameghino |first=Florentino |title=Notices préliminaires sur des ongulés nouveaux des terrains crétacés de Patagonie |year=1901|author-link=Florentino Ameghino}} He originally considered it a member of the pantodont family Pantolambdidae, but recent studies have shown this to be incorrect, as Richard Cifelli considered it as a member of the litoptern family Proterotheriidae, more specifically within the subfamily Anisolambdinae.{{Cite journal |last=Cifelli |first=Richard |date=1983 |title=The origin and affinities of the South American Condylarthra and early Tertiary Litopterna (Mammalia). American Museum novitates ; no. 2772 |url=https://digitallibrary.amnh.org/handle/2246/5256|journal=American Museum Novitates|hdl=2246/5256 |language=en-US}} Anisolambdinae (also called Anisolambdidae in some studies) was proposed to unite the primitive and earlier forms Anisolambda, Eolicaphrium, Heteroglyphis, Lambdaconops, Paranisolambda, Protheosodon, Wainka and Xesmodon. However, the phylogenetic analysis of McGrath and colleagues recovered the included genera to neither form their own clade, or to universally represent basal taxa outside the genera of Proterotheriinae per Soria, making Anisolambdinae a polyphyletic group of unrelated organisms.{{Cite journal|author1=Andrew J. McGrath |author2=Federico Anaya |author3=Darin A. Croft |year=2020 |title=New proterotheriids (Litopterna, Mammalia) from the middle Miocene of Quebrada Honda, Bolivia, and trends in diversity and body size of proterotheriid and macraucheniid litopterns |journal=Ameghiniana |volume=57 |issue=2 |pages=159–188 |doi=10.5710/AMGH.03.03.2020.3268 |s2cid=216236954 }}
References
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{{Meridiungulata|L.|state=collapsed}}
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Category:Prehistoric placental genera
Category:Eocene mammals of South America
Category:Fossil taxa described in 1901
Category:Taxa named by Florentino Ameghino