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Kannemeyeriiformes

From Wikipedia, the free encyclopedia
(Redirected fromKannemeyeriidae)
Extinct clade of dicynodonts

Kannemeyeriiforms
Temporal range:Triassic,251.3–201.4 Ma
Restoration ofStahleckeria potens
Scientific classificationEdit this classification
Domain:Eukaryota
Kingdom:Animalia
Phylum:Chordata
Clade:Synapsida
Clade:Therapsida
Suborder:Anomodontia
Clade:Dicynodontia
Infraorder:Dicynodontoidea
Clade:Kannemeyeriiformes
von Huene, 1948
Subgroups

Kannemeyeriiformes is a group of large-bodiedTriassicdicynodonts. As aclade, Kannemeyeriiformes has been defined to include the speciesKannemeyeria simocephalus and all dicynodonts more closely related to it than to the speciesLystrosaurus murrayi.

Evolutionary history

[edit]

Despite being the most species-rich group of dicynodonts in the Triassic Period, kannemeyeriiforms exhibit much less diversity in terms of their anatomy and ecological roles than the dicynodonts from thePermian Period.

Lystrosauridae is thought to be the most closely related group (sister taxon) to Kannemeyeriiformes, and since the earliest lystrosaurids are known from theLate Permian, the divergence of these two groups must have occurred at least as far back as this time, implying that a longghost lineage must exist.[1] Although no kannemeyeriiforms have been found in the Late Permian yet, the recent discovery ofSungeodon helps fill a gap in the early fossil record of the group by showing that kannemeyeriiforms diversified right after thePermian-Triassic extinction event.[2]

Classification

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Four families have been included in the group: Kannemeyeriidae,Shansiodontidae,Stahleckeriidae, andDinodontosauridae.[3] Occasionally some of these families are not recognized, with most kannemeyeriiforms being placed in Kannemeyeriidae.[4] Recentphylogenetic analyses suggest that these families represent similar body plans ormorphotypes rather than true evolutionary groupings.[1]

Phylogeny

[edit]

Below is acladogram from Szczygielski & Sulej (2023):[5]

Kannemeyeriiformes

References

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  1. ^abKammerer, C. F.; Fröbisch, J. R.; Angielczyk, K. D. (2013). Farke, Andrew A (ed.)."On the Validity and Phylogenetic Position of Eubrachiosaurus browni, a Kannemeyeriiform Dicynodont (Anomodontia) from Triassic North America".PLOS ONE.8 (5): e64203.Bibcode:2013PLoSO...864203K.doi:10.1371/journal.pone.0064203.PMC 3669350.PMID 23741307.
  2. ^Maisch, M. W.; Matzke, A. T. (2014). "Sungeodon kimkraemerae n. gen. n. sp., the oldest kannemeyeriiform (Therapsida, Dicynodontia) and its implications for the early diversification of large herbivores after the P/T boundary". Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 272: 1. doi:10.1127/0077-7749/2014/0394. edit
  3. ^Zavattieri, A. M.; Arcucci, A. B. (2007)."Edad y posición estratigráfica de los tetrápodos del cerro Bayo de Potrerillos (Triásico), Mendoza, Argentina".Ameghiniana.44:133–142.ISSN 1851-8044.
  4. ^Surkov, M.V.; Benton, M.J. (2008). "Head kinematics and feeding adaptations of the Permian and Triassic dicynodonts".Journal of Vertebrate Paleontology.28 (4):1120–1129.Bibcode:2008JVPal..28.1120S.doi:10.1671/0272-4634-28.4.1120.S2CID 85792653.
  5. ^Szczygielski, T.; Sulej, T. (2023)."Woznikella triradiata n. gen., n. sp. – a new kannemeyeriiform dicynodont from the Late Triassic of northern Pangea and the global distribution of Triassic dicynodonts"(PDF).Comptes Rendus Palevol.22 (16):279–406.doi:10.5852/cr-palevol2023v22a16.
Synapsida
Anomodontia
    • see below↓
Anomocephaloidea
Venyukovioidea
Chainosauria
Dicynodontia
    • see below↓
Galepus jouberti
Pylaecephalidae
Endothiodontia
Therochelonia
Emydopoidea
Emydopidae
Myosauridae
Kingoriidae
Cistecephalidae
Bidentalia
    • see below↓
Diictodon felicepsDicynodontoides recurvidens
Elphidae
Geikiidae
Oudenodontidae
Rhachiocephalidae
Dicynodontoidea
Lystrosauridae
Kannemeyeriiformes
    • see below↓
Geikia elginensisLystrosaurus murrayi
Shansiodontidae
Kannemeyeriidae
Stahleckeriidae
Placeriinae
Stahleckeriinae
Lisowicia bojani
Other articles
Nomina dubia
Paraphyletic groups
Kannemeyeriiformes
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