2018 - 2018.
I am the curator of part of the fossil reptile collections here at the NHM, including the non-mammalian synapsids, parareptiles, lepidosauromorphs, and pterosaurus. In this role, my duties involve ensuring that collections are well maintained, improving their digital records and storage, accessioning new material, working with the outreach branches of the Museum, and facilitating scientific visitors. I also pursue my own research: I spent 8 years in South Africa and consequently my main area of interest centres on the evolution of vertebrate ecosystems in the Middle Permian (265-259 million years ago) of the South African Karoo Basin. In particular, this time period encompasses a relatively poorly-understood mass extinction event, the late Capitanian mass extinction, and much of my work involves understanding how this proceeded, its effects on terrestrial vertebrate life, and its potential causes. I am helping lead a project aiming to provide better temporal constraints on this Permian Karoo fossil record, and thus provide a better understanding of the tempo of evolutionary events. I collaborate on many other projects studying footprints, floras and sedimentology from the Middle Permian of South Africa. I have spent a lot of time collecting fossils in South Africa and am continuing to do so.
PhD in Palaeontology, University of the Witwatersrand, Johannesburg, 2010 - 2013
MSc in Palaeoanthropology, University of Sheffield, Sheffield, 2007 - 2008
BSc in Geology and Biology, University of Bristol, Bristol, 2003 - 2006
Curator, Non-Mammalian Tetrapods, The Natural History Museum, Earth Sciences, United Kingdom, 2018 - ongoing
Postdoctoral Research Fellow, University of the Witwatersrand, Evolutionary Studies Institute, South Africa, 2013 - 2018
2018 - 2018.
Day M, Rubidge BS (2019) Biesiespoort revisited: a case study on the relationship between tetrapod assemblage zones and Beaufort lithostratigraphy south of Victoria West. Palaeontologia Africana, 53 : 51 - 65.
Day M, Benson RBJ, Kammerer CF, Rubidge BS (2018) Evolutionary rates of mid-Permian tetrapods from South Africa and the role of temporal resolution in turnover reconstruction. Paleobiology, 44 (3) : 347 - 367. doi: 10.1017/pab.2018.17
Rey K, Day MO, Amiot R, Goedert J, Lécuyer C, Sealy J, Rubidge BS (2018) Stable isotope record implicates aridification without warming during the late Capitanian mass extinction. Gondwana Research, 59 : 1 - 8. doi: 10.1016/j.gr.2018.02.017
Brocklehurst N, Day MO, Fröbisch J (2018) Accounting for differences in species frequency distributions when calculating beta diversity in the fossil record. Methods in Ecology and Evolution, 9 (6) : 1409 - 1420. doi: 10.1111/2041-210X.13007
Day MO, Smith RMH, Benoit J, Fernandez V, Rubidge BS (null) A new species of burnetiid (Therapsida, Burnetiamorpha) from the early Wuchiapingian of South Africa and implications for the evolutionary ecology of the family Burnetiidae. Papers in Palaeontology, doi: 10.1002/spp2.1114
Roopnarine PD, Angielczyk KD, Olroyd SL, Nesbitt SJ, Botha-brink J, Peecook BR, Day MO, Smith RMH (2017) Comparative ecological dynamics of Permian-Triassic communities from the Karoo, Luangwa, and Ruhuhu Basins of southern Africa. Journal of Vertebrate Paleontology, 37 (sup1) : 254 - 272. doi: 10.1080/02724634.2018.1424714
Brocklehurst N, Day MO, Rubidge BS, Fröbisch J (2017) Olson's Extinction and the latitudinal biodiversity gradient of tetrapods in the Permian. Proceedings of the Royal Society B: Biological Sciences, 284 (1852) : 20170231 - 20170231. doi: 10.1098/rspb.2017.0231
Rey K, Amiot R, Fourel F, Rigaudier T, Abdala F, Day MO, Fernandez V, Fluteau F, France-Lanord C, Rubidge BS, Smith RM, Viglietti PA, Zipfel B, Lécuyer C (2016) Global climate perturbations during the Permo-Triassic mass extinctions recorded by continental tetrapods from South Africa. Gondwana Research, 37 : 384 - 396. doi: 10.1016/j.gr.2015.09.008
Cole D, Johnson M, Day M (2016) Lithostratigraphy of the Abrahamskraal Formation (Karoo Supergroup), South Africa. South African Journal of Geology, 119 (2) : 415 - 424. doi: 10.2113/gssajg.119.2.415
Angielczyk KD, Rubidge BS, Day MO, Lin F (2016) A reevaluation of Brachyprosopus broomi and Chelydontops altidentalis , dicynodonts (Therapsida, Anomodontia) from the middle Permian Tapinocephalus Assemblage Zone of the Karoo Basin, South Africa. Journal of Vertebrate Paleontology, 36 (2) : e1078342 - e1078342. doi: 10.1080/02724634.2016.1078342
Day M, Rubidge B, Abdala F (2016) A new mid-Permian burnetiamorph therapsid from the Main Karoo Basin of South Africa and a phylogenetic review of Burnetiamorpha.. Acta Palaeontologica Polonica, 61 : doi: 10.4202/app.00296.2016
Day MO, Ramezani J, Bowring SA, Sadler PM, Erwin DH, Abdala F, Rubidge BS (2015) When and how did the terrestrial mid-Permian mass extinction occur? Evidence from the tetrapod record of the Karoo Basin, South Africa. Proceedings of the Royal Society B: Biological Sciences, 282 (1811) : 20150834 - 20150834. doi: 10.1098/rspb.2015.0834
Kammerer CF, Smith RMH, Day MO, Rubidge BS (2015) New information on the morphology and stratigraphic range of the mid-Permian gorgonopsian Eriphostoma microdon Broom, 1911. Papers in Palaeontology, 1 (2) : 201 - 221. doi: 10.1002/spp2.1012
Michael M, Güven S, Abdala F, Jirah S, Rubidge B, Almond J (2015) Youngest dinocephalian fossils extend the Tapinocephalus Zone, Karoo Basin, South Africa. South African Journal of Science, 111 (3/4) : doi: 10.17159/sajs.2015/20140309
Day MO, Rubidge BS (2014) A brief lithostratigraphic review of the Abrahamskraal and Koonap formations of the Beaufort Group, South Africa: Towards a basin-wide stratigraphic scheme for the Middle Permian Karoo. Journal of African Earth Sciences, 100 : 227 - 242. doi: 10.1016/j.jafrearsci.2014.07.001
Day M, Rubidge BS (null) Biesiespoort revisited: a case study on the relationship between tetrapod assemblage zones and Beaufort lithostratigraphy south of Victoria West. Palaeontologia Africana, 53 : 51 - 65.