The origin of Rhinocerotoidea and phylogeny of Ceratomorpha (Mammalia, Perissodactyla)
Open Access
- 14 September 2020
- journal article
- research article
- Published by Springer Science and Business Media LLC in Communications Biology
- Vol. 3 (1), 1-16
- https://doi.org/10.1038/s42003-020-01205-8
Abstract
Rhinoceroses have been considered to have originated from tapiroids in the middle Eocene; however, the transition remains controversial, and the first unequivocal rhinocerotoids appeared about 4 Ma later than the earliest tapiroids of the Early Eocene. Here we describe 5 genera and 6 new species of rhinoceroses recently discovered from the early Eocene to the early middle Eocene deposits of the Erlian Basin of Inner Mongolia, China. These new materials represent the earliest members of rhinocerotoids, forstercooperiids, and/or hyrachyids, and bridge the evolutionary gap between the early Eocene ceratomorphs and middle Eocene rhinocerotoids. The phylogenetic analyses using parsimony and Bayesian inference methods support their affinities with rhinocerotoids, and also illuminate the phylogenetic relationships and biogeography of Ceratomorpha, although some discrepancies are present between the two criteria. The nearly contemporary occurrence of various rhinocerotoids indicates that the divergence of different rhinocerotoid groups occurred no later than the late early Eocene, which is soon after the split between the rhinocerotoids and the tapiroids in the early early Eocene. However, the Bayesian tip-dating estimate suggests that the divergence of different ceratomorph groups occurred in the middle Paleocene.Keywords
This publication has 51 references indexed in Scilit:
- MrBayes 3.2: Efficient Bayesian Phylogenetic Inference and Model Choice Across a Large Model SpaceSystematic Biology, 2012
- Molecular phylogeny and evolution of the PerissodactylaZoological Journal of the Linnean Society, 2011
- Diversity and Evolution of Hunter-Schreger Band Configuration in Tooth Enamel of Perissodactyl MammalsActa Palaeontologica Polonica, 2011
- Sampling-through-time in birth–death treesJournal of Theoretical Biology, 2010
- The origin of chalicotheres (Perissodactyla, Mammalia)Palaeontology, 2004
- Comparative osteology of early Tertiary tapiromorphs (Mammalia, Perissodactyla)Zoological Journal of the Linnean Society, 2001
- The Phylogeny and Classification of Tapiromorph Perissodactyls (Mammalia)Cladistics, 1999
- New ceratomorph perissodactyls (Mammalia) from the Middle and Late Eocene of Mongolia: their implications for phylogeny and datingZoological Journal of the Linnean Society, 1997
- A Tiny New Eocene Ceratomorph and Comments on "Tapiroid" SystematicsJournal of Mammalogy, 1989
- The phylogeny of the Rhinocerotoidea (Mammalia, Perissodactyla)Zoological Journal of the Linnean Society, 1986