Biology:Thomasia (animal)

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Short description: Extinct genus of mammaliaforms

Thomasia
Temporal range: Rhaetian-Hettangian
~206–189 Ma
Thomasia cf moorei.jpg
Molariforms of Thomasia cf. moorei
Scientific classification e
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Synapsida
Clade: Therapsida
Clade: Cynodontia
Clade: Mammaliaformes
Order: Haramiyida
Family: Haramiyidae
Genus: Thomasia
Poche, 1908
Type species
Microlestes antiquus
Pleininger, 1847
Species
  • T. antiqua (Plieninger, 1847)
  • T. hahni Butler & Macintyre, 1994
  • T. moorei (Owen, 1871)
  • T. woutersi Butler & Macintyre, 1994
Synonyms
  • Haramiya Simpson, 1947
  • Microcleptes Simpson, 1928
  • Microlestes Plieninger, 1847
  • Pleiningeria Krausse, 1919

Thomasia is a mammaliaform from the family Haramiyidae.[1] from the Late Triassic of Europe. It is only known from teeth.[2]

Distribution

Fossils of the genus have been found in:[3]

Triassic
  • Sables and Grès de Mortinsart Formations, Gaume, Belgium
  • Microlestes Quarry, Frome, England
  • Exter and Trossingen Formations, Germany
  • Auf dem Heftgen, Syren, Luxembourg
  • Klettgau Formation, Switzerland
  • Gres à Avicula contorta Formation, Franche-Comté and Lorraine, France
Jurassic
  • Pant Fissure System 4, Pant Quarry, St Brides Major (community), Wales

References

  1. http://palaeos.com/vertebrates/mammaliformes/mammaliformes.html#Haramiyida Palaeos on Haramiya
  2. Zofia Kielan-Jaworowska, Richard L. Cifelli, and Zhe-Xi Luo, Mammals from the Age of Dinosaurs: Origins, Evolution, and Structure (New York: Columbia University Press, 2004), 249–260.
  3. Thomasia at Fossilworks.org

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