 | This article relies largely or entirely on a single source. (January 2021) |
| Kalaallitkigun Temporal range:
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| Jaw diagram in lingual (internal) view, preserved areas in blue | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Synapsida |
| Clade: | Therapsida |
| Clade: | Cynodontia |
| Clade: | Mammaliaformes |
| Order: | †Haramiyida |
| Genus: | †Kalaallitkigun Sulej et al., 2020 |
| Species: | †K. jenkinsi
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| Binomial name | |
| †Kalaallitkigun jenkinsi Sulej et al., 2020
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Kalaallitkigun is an extinct genus of haramiyidan mammaliaforms from the Late Triassic of Greenland. It contains a single species, Kalaallitkigun jenkinsi, which was described in 2020 from a partial dentary (lower jaw) found in the Fleming Fjord Formation. More specifically, it was found in the mid-late Norian (~215 Ma) Carlsberg Fjord beds of the Ørsted Dal Member. It is the oldest of several mammaliaform species discovered in the Late Triassic sediments of Greenland. It is also the oldest mammaliaform with double-rooted teeth, and its pattern of tooth cusps help to clarify the evolution of haramiyidan teeth relative to their morganucodont-like ancestors.[1]
- ^ Sulej, T.; Krzesiński, G.; Tałanda, M.; Wolniewicz, A. S.; Błażejowski, B.; Bonde, N.; Gutowski, P.; Sienkiewicz, M.; Niedźwiedzki, G. (2020). "The earliest-known mammaliaform fossil from Greenland sheds light on origin of mammals". Proceedings of the National Academy of Sciences. 117 (43): 26861–26867. doi:10.1073/pnas.2012437117. PMC 7604429. PMID 33046636.