Article · Wikipedia archive · Last revised Jul 20, 2026

Thomasia (animal)

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

Last revised
Jul 20, 2026
Read time
≈ 1 min
Length
177 w
Citations
3
Source
Thomasia
Temporal range: Rhaetian-Hettangian
~
Molariforms of Thomasia cf. moorei
Scientific classification Edit this classification
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
Jurassic
References

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