Artykuł w czasopiśmie
Brak miniatury
Licencja
CC-BYCC-BY - Uznanie autorstwa
 

The earliest-known mammaliaform fossil from Greenland sheds light on origin of mammals

Uproszczony widok
cris.lastimport.scopus2024-02-12T20:22:52Z
dc.abstract.enSynapsids are unique in having developed multirooted teeth and complex occlusions. These innovations evolved in at least two lineages of mammaliamorphs (Tritylodontidae and Mammaliaformes). Triassic fossils demonstrate that close to the origins of mammals, mammaliaform precursors were “experimenting” with tooth structure and function, resulting in novel patterns of occlusion. One of the most surprising examples of such adaptations is present in the haramiyidan clade, which differed from contemporary mammaliaforms in having two rows of cusps on molariform crowns adapted to omnivorous/herbivorous feeding. However, the origin of the multicusped tooth pattern present in haramiyidans has remained enigmatic. Here we describe the earliest-known mandibular fossil of a mammaliaform with double molariform roots and a crown with two rows of cusps from the Late Triassic of Greenland. The crown morphology is intermediate between that of morganucodontans and haramiyidans and suggests the derivation of the multicusped molariforms of haramiyidans from the triconodont molar pattern seen in morganucodontids. Although it is remarkably well documented in the fossil record, the significance of tooth root division in mammaliaforms remains enigmatic. The results of our biomechanical analyses (finite element analysis [FEA]) indicate that teeth with two roots can better withstand stronger mechanical stresses like those resulting from tooth occlusion, than teeth with a single root.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorBłażejowski, Błażej
dc.contributor.authorSulej, Tomasz
dc.contributor.authorGutowski, Piotr
dc.contributor.authorBonde, Niels
dc.contributor.authorWolniewicz, Andrzej
dc.contributor.authorNiedźwiedzki, Grzegorz
dc.contributor.authorSienkiewicz, Maksymilian
dc.contributor.authorKrzesiński, Grzegorz
dc.contributor.authorTałanda, Mateusz
dc.date.accessioned2024-01-26T10:10:48Z
dc.date.available2024-01-26T10:10:48Z
dc.date.copyright2020-10-12
dc.date.issued2020
dc.description.accesstimeAT_PUBLICATION
dc.description.financeŚrodki finansowe przyznane na realizację projektu w zakresie badań naukowych lub prac rozwojowych
dc.description.versionFINAL_PUBLISHED
dc.identifier.doi10.1073/PNAS.2012437117
dc.identifier.issn0027-8424
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/122137
dc.identifier.weblinkhttps://www.pnas.org/content/pnas/117/43/26861.full.pdf
dc.languageeng
dc.pbn.affiliationbiological sciences
dc.relation.ispartofProceedings of the National Academy of Sciences of the United States of America
dc.relation.pages1-7
dc.rightsCC-BY
dc.sciencecloudnosend
dc.titleThe earliest-known mammaliaform fossil from Greenland sheds light on origin of mammals
dc.typeJournalArticle
dspace.entity.typePublication