Prehistoric Synapsids Codexery

Eutriconodonta

Early mammals showing diverse bodyplans and ecological roles.

Last updated

Eutriconodonta is an order of early mammals that existed during the Jurassic and Cretaceous periods across multiple continents.[1] Discoveries have shown them to include a vast variety of bodyplans, ecological niches and locomotion methods.[2] Kermack and colleagues in 1973 proposed the name Eutriconodonta to replace the paraphyletic grouping Triconodonta.[1]

Scientific classification

  1. KingdomAnimalia
  2. PhylumChordata
  3. Order†Eutriconodonta

Named by Kermack et al., 1973

Sources: Wikipedia taxobox: Eutriconodonta (CC BY-SA 4.0)

Last updated 2026-10-05 from the source article.

Quick Facts

Temporal range
Late Early Jurassic (Toarcian) to Late Cretaceous (Maastrichtian)
Known from
  • Asia
  • Africa
  • Europe
  • North America
  • South America
Key groups
  • Triconodontids
  • gobiconodontids
  • amphilestids
  • jeholodentids
Diet
Primarily carnivorous
Notable genera
  • Repenomamus
  • Gobiconodon
  • Spinolestes
  • Volaticotherium
  • Indotriconodon

Facts from the source article.

What the cited sources add

Luo, Kielan-Jaworowska and Cifelli (2002) proposed a phylogeny of all major groups of Mesozoic mammals based on phylogenetic analyses of 46 taxa and 275 characters.[7] They tentatively favored recognition of a monophyletic Eutriconodonta nested within the mammalian crown group.[7] The analysis found that recovering eutriconodonts outside the crown group of Mammalia required only five additional steps compared to the most parsimonious solution.[8] According to the authors, placing eutriconodonts outside the mammalian crown group is statistically possible but less probable than placing them within it.[9]

Thomas Martin and colleagues produced the most recent cladogram in 2015 when they described Spinolestes.[10]

References

  1. Wikipedia, "Eutriconodonta" (CC BY-SA 4.0), which cites: Kermack, "The lower jaw of Morganucodon", Zoological Journal of the Linnean Society, 1973, p. 87–175; Averianov, "Phylogeny of triconodonts and symmetrodonts and the origin of extant mammals", Doklady Biological Sciences, February 2011, p. 32–35 (original not read by us) en.wikipedia.org
  2. Wikipedia, "Eutriconodonta" (CC BY-SA 4.0), which cites: Kielan-Jaworowska, "Mammals from the Age of Dinosaurs: origins, evolution, and structure", Columbia University Press, 2004, p. 216–248; Meng, "Mesozoic mammals of China: implications for phylogeny and early evolution of mammals", National Science Review, 1 December 2014, p. 521–542; Martin, "A Cretaceous eutriconodont and integument evolution in early mammals", Nature, October 2015, p. 380–384; Chen, "A multivariate approach to infer locomotor modes in Mesozoic mammals", Paleobiology, March 2015, p. 280–312; Chen, "The postcranial skelet en.wikipedia.org
  3. Wikipedia, "Eutriconodonta" (CC BY-SA 4.0), which cites: Butler, "Diversity of triconodonts in the Middle Jurassic of Great Britain", Palaeontologia Polonica, 2016, p. 35–65 (original not read by us) en.wikipedia.org
  4. Wikipedia, "Eutriconodonta" (CC BY-SA 4.0), which cites: Averianov, "A high-latitude fauna of mid-Mesozoic mammals from Yakutia, Russia", PLOS ONE, 25 July 2018 (original not read by us) en.wikipedia.org
  5. Wikipedia, "Eutriconodonta" (CC BY-SA 4.0), which cites: Kielan-Jaworowska, "Mammals from the Age of Dinosaurs: origins, evolution, and structure", Columbia University Press, 2004, p. 216–248; Simpson, "American Mesozoic Mammalia", December 2020; Kielan-Jaworowska, "Mammals from the Age of Dinosaurs: origins, evolution, and structure", Columbia University Press, 2004, p. 216–248 (original not read by us) en.wikipedia.org
  6. Wikipedia, "Eutriconodonta" (CC BY-SA 4.0), which cites: Bajpai, "The first eutriconodontan mammal from the Cretaceous (Maastrichtian) of India", Journal of Vertebrate Paleontology, 29 February 2024; Forasiepi, "First Dryolestoid (Mammalia, Dryolestoidea, Meridiolestida) from the Coniacian of Patagonia and New Evidence on their Early Radiation in South America", Ameghiniana, 1 December 2012, p. 497 (original not read by us) en.wikipedia.org
  7. Luo, "In quest for a phylogeny of Mesozoic mammals", Acta Palaeontologica Polonica, 2002, p. 1–78. facts only, no text reused. app.pan.pl
  8. Wikipedia, "Eutriconodonta" (CC BY-SA 4.0), which cites: Benton, "Fossil Mammals and Birds of Great Britain", Joint Nature Conversation Committee, 2005, p. 289 (we also read that source) en.wikipedia.org
  9. Wikipedia, "Eutriconodonta" (CC BY-SA 4.0), which cites: Luo, "In quest for a phylogeny of Mesozoic mammals", Acta Palaeontologica Polonica, 2002, p. 1–78 (we also read that source) en.wikipedia.org
  10. Wikipedia, "Eutriconodonta" (CC BY-SA 4.0), which cites: Martin, "A Cretaceous eutriconodont and integument evolution in early mammals", Nature, October 2015, p. 380–384 (we also read that source) en.wikipedia.org

Each numbered sentence above was checked against the source it cites before publication. Sentences citing Wikipedia adapt text from the English Wikipedia article Eutriconodonta (contributors), used under CC BY-SA 4.0; this entry is available under the same licence. Other sources were used for facts only; no text or images are copied from them.

Also in the Codexery

Eutriconodonta · Ancient Reptiles

More in Prehistoric Synapsids

CynodontiaDiadectesDicynodontiaDimetrodonDinocephaliaEdaphosaurusGorgonopsGorgonopsiaInostranceviaLystrosaurusMammaliaformesMegazostrodon

Related in Prehistoric Synapsids

Mammaliaformes

Links follow this subject's own source article.

Sources

Compiled from Wikipedia and the sources listed below. Text from Wikipedia is available under CC BY-SA 4.0; this entry is adapted from it.

Spotted an error? Know more?

Reader corrections go straight into our review queue. Suggest an edit · How this site is sourced

Comments

Loading…
Open in the interactive codex →