Kermackodon

Kermackodon is a genus of extinct allotherian mammaliform, known from the Middle Jurassic of England. It combines features of multituberculates with those of euharamyidans. The remains of type species, K. multicuspis were collected from Kirtlington Quarry in Oxford, England, by a team lead from UCL led by Professor Kenneth Kermack after whom the taxon is named, from sediments of the Forest Marble Formation, dating to the Bathonian stage of the Middle Jurassic. The genus and species were named by Percy M. Butler and Jerry Hooker in 2005. The remains comprise a left upper molar (M2), a lower last premolar, initially considered a left but later considered more likely to be right (p4), and an incomplete non-last upper premolar (P3 or P4).^[1][2] A second species, K. oxfordensis, from Kirtlington and also sediments of the White Limestone Formation at Woodeaton Quarry was assigned to the genus in 2022, originally placed in the separate genus Eleutherodon.^[3] A 2020 study considered it to be more closely related to mutlituberculates than to euharamiyidans,^[2] while the 2022 study considered it to be a member of Euharamiyida.^[3]

Kermackodon Temporal range: Bathonian PreꞒ Ꞓ O S D C P T J K Pg N ↓
Teeth of Kermackodon, including M2 upper molar (A), p4 lower last premolar (B) and a P3 or P4 upper premolar (C)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Subclass:	†Allotheria
Genus:	†Kermackodon Butler & Hooker, 2005
Type species
Kermackodon multicuspis Butler & Hooker, 2005
Other species
K. oxfordensis (Kermack et al. 1998)

References

1. M., Butler, Percy; Hooker, Jerry J. (2005). New teeth of allotherian mammals from the English Bathonian, including the earliest multituberculates. Acta Paleontologica Polonica. OCLC 1008691823.{{cite book}}: CS1 maint: multiple names: authors list (link)
2. Averianov, Alexander O.; Martin, Thomas; Lopatin, Alexey V.; Schultz, Julia A.; Schellhorn, Rico; Krasnolutskii, Sergei; Skutschas, Pavel; Ivantsov, Stepan (2020-04-30). "Multituberculate mammals from the Middle Jurassic of Western Siberia, Russia, and the origin of Multituberculata". Papers in Palaeontology. 7 (2): 769–787. doi:10.1002/spp2.1317. ISSN 2056-2799. S2CID 219067218.
3. Mao, Fangyuan; Brewer, Philippa; Hooker, Jerry J.; Meng, Jin (2022-12-31). "New allotherian specimens from the Middle Jurassic Woodeaton Quarry (Oxfordshire) and implications for haramiyidan diversity and phylogeny". Journal of Systematic Palaeontology. 20 (1): 1–37. doi:10.1080/14772019.2022.2097021. ISSN 1477-2019. S2CID 251708147.