Thomasia (animal)

Short description: Extinct genus of mammaliaforms

Thomasia

Temporal range: Rhaetian-Hettangian
~206–189 Ma

PreЄ

Molariforms of Thomasia cf. moorei
Scientific 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

* 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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*[†]: Extinct