Thomasia (animal)

Thomasia; Temporal range: Rhaetian-Hettangian ; ~206–189 Ma PreꞒ Ꞓ O S D C P T J K Pg N
	Molariforms of Thomasia cf. moorei
Scientific classification
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. hahniButler & Macintyre, 1994; †T. moorei(Owen, 1871); †T. woutersiButler & Macintyre, 1994;
Synonyms
	HaramiyaSimpson, 1947; MicrocleptesSimpson, 1928; MicrolestesPlieninger, 1847; PleiningeriaKrausse, 1919;

Last updated March 26, 2025

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

↑ http://palaeos.com/vertebrates/mammaliformes/mammaliformes.html#Haramiyida Palaeos on Haramiya
↑ 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.
↑ Thomasia at Fossilworks.org

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[1] ttp://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.

[FW-3] Thomasia at Fossilworks.org

[1]

[2]

[3]

Thomasia Temporal range: Rhaetian-Hettangian ~206–189 Ma PreꞒ Ꞓ O S D C P T J K Pg N

Molariforms of Thomasia cf. moorei
Scientific classification
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. hahniButler & Macintyre, 1994 †T. moorei(Owen, 1871) †T. woutersiButler & Macintyre, 1994
Synonyms
HaramiyaSimpson, 1947 MicrocleptesSimpson, 1928 MicrolestesPlieninger, 1847 PleiningeriaKrausse, 1919