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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00004360naa a2200457 4500
001oai:DiVA.org:uu-426342
003SwePub
008201202s2020 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4263422 URI
0247 a https://doi.org/10.1073/pnas.20124371172 DOI
040 a (SwePub)uu
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Sulej, Tomaszu Polish Acad Sci, Inst Paleobiol, PL-00818 Warsaw, Poland4 aut
2451 0a The earliest-known mammaliaform fossil from Greenland sheds light on origin of mammals
264 c 2020-10-12
264 1b Proceedings of the National Academy of Sciences,c 2020
338 a print2 rdacarrier
520 a Synapsids 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 Glade, 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.
650 7a NATURVETENSKAPx Geovetenskap och miljövetenskapx Annan geovetenskap och miljövetenskap0 (SwePub)105992 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Other Earth and Related Environmental Sciences0 (SwePub)105992 hsv//eng
653 a Greenland
653 a Late Triassic
653 a mammaliaform
653 a multirooted tooth
653 a complex occlusion
7001 a Krzesinski, Grzegorzu Warsaw Univ Technol, Inst Aeronaut & Appl Mech, Fac Power & Aeronaut Engn, PL-00665 Warsaw, Poland4 aut
7001 a Talanda, Mateuszu Univ Warsaw, Biol & Chem Res Ctr, Fac Biol, Dept Paleobiol & Evolut, PL-02089 Warsaw, Poland4 aut
7001 a Wolniewicz, Andrzej S.u Polish Acad Sci, Inst Paleobiol, PL-00818 Warsaw, Poland; Univ Oxford, Dept Earth Sci, Oxford OX1 3AN, England4 aut
7001 a Blazejowski, Blazeju Polish Acad Sci, Inst Paleobiol, PL-00818 Warsaw, Poland4 aut
7001 a Bonde, Nielsu Univ Copenhagen, Nat Hist Museum Denmark, Geol Sect, DK-2100 Copenhagen, Denmark; Fur Museum, DK-7884 Fur, Denmark4 aut
7001 a Gutowski, Piotru Med Univ Warsaw, Dept Craniomaxillofacial Surg Oral Surg & Implant, PL-02091 Warsaw, Poland4 aut
7001 a Sienkiewicz, Maksymilianu Warsaw Univ Technol, Inst Aeronaut & Appl Mech, Fac Power & Aeronaut Engn, PL-00665 Warsaw, Poland4 aut
7001 a Niedzwiedzki, Grzegorz,d 1980-u Uppsala universitet,Evolution och utvecklingsbiologi4 aut0 (Swepub:uu)grzni333
7102 a Polish Acad Sci, Inst Paleobiol, PL-00818 Warsaw, Polandb Warsaw Univ Technol, Inst Aeronaut & Appl Mech, Fac Power & Aeronaut Engn, PL-00665 Warsaw, Poland4 org
7730 t Proceedings of the National Academy of Sciences of the United States of Americad : Proceedings of the National Academy of Sciencesg 117:43, s. 26861-26867q 117:43<26861-26867x 0027-8424x 1091-6490
8564 u https://www.pnas.org/content/pnas/117/43/26861.full.pdf
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-426342
8564 8u https://doi.org/10.1073/pnas.2012437117

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