Abstract
The earliest mammals in the fossil record are recognized by their multicusped and multiple-rooted cheek teeth, and in south-west Britain they appear abruptly in sediments that postdate the Rhaetic transgression at ∼200 Myr. Here we report the discovery of teeth of the primitive mammal Kuehneotherium in a terrestrial fissure deposit from the Mendip Hills (Somerset, UK) that predates the Rhaetic transgression. The teeth were found in the sediment fill of a collapsed cave1 at Emborough near Wells during the systematic reinvestigation of a number of late Triassic vertebrate sites. The assemblage is otherwise typically pre-Rhaetic and includes the gliding lizard Kuehneosaurus. The finding of mammalian remains throws doubt on the fundamental distinctiveness of pre-Rhaetic and post-Rhaetic vertebrate faunas.
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References
Robinson, P. L. J. Linn. Soc. 43, 260–282 (1957).
Robinson, P. L. Palaeontology 14, 131–153 (1971).
Fraser, N. C. Palaeontology 25, 709–725 (1982).
Fraser, N. C. & Walkden, G. M. Palaeogeogr., Palaeoclimatol., Palaeoecol. 42, 341–365 (1983).
Halstead, L. B. & Nicoll, P. G. Stud. Speleol. 2, 93–102 (1971).
Kermack, K. A., Mussett, F. & Rigney, H. W. Zool. J. Linn. Soc. 53, 87–175 (1973).
Kermack, D. M., Kermack, K. A. & Mussett, F. J. Linn. Soc. 47, 407–423 (1968).
Evans, S. E. J. Linn. Soc. 70, 203–264 (1980).
Marshall, J. E. A. & Whiteside, D. I. Nature 287, 627–628 (1980).
Whiteside, D. I. & Robinson, D. Palaeogeogr., Palaeoclimatol., Palaeoecol. 41, 81–85 (1983).
Warrington, G. Proc. Ussher Soc. 4, 76–81 (1977).
Robinson, P. L. Proc. geol. Soc. 1601, 137–146 (1962).
Crush, P. J. thesis, Univ. College London (1980).
Crush, P. J. Palaeontology 27, 131–157 (1984).
Sigogneau-Russel, D. Acta palaeont. pol. 28, 233–249 (1983); Zool. J. Linn. Soc. 78, 175–186 (1983).
Hahn, G. Palaeontographica A142, 1–15 (1973).
Mills, J. R. E. in Early Mammals (eds Kermack, D. M. & Kermack, K. A.) 29–63 (Academic, London, 1971).
Clemens, W. A. & Kielan-Jaworowska, Z. in Mesozoic Mammals (eds Lillegraven, J. A., Kielan-Jaworowska, Z. & Clemens, W. A.) 99–149 (University of California Press, 1979).
Kemp, T. S. Mammal-like Reptiles and the Origin of Mammals, 363 (Academic, London, 1982).
Mills, J. R. E. J. Linn. Soc. 50, Suppl. 1, 29–63 (1971).
Crompton, A. W., Taylor, C. R. & Jagger, J. A. Nature 272, 333–336 (1978).
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Fraser, N., Walkden, G. & Stewart, V. The first pre-Rhaetic therian mammal. Nature 314, 161–163 (1985). https://doi.org/10.1038/314161a0
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DOI: https://doi.org/10.1038/314161a0
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