Acta Palaeontologica Polonica

Monotreme nature of the Australian Early Cretaceous mammal Teinolophos

Thomas H. Rich, Patricia Vickers-Rich, Peter Trusler, Timothy F. Flannery, Richard Cifelli, Andrew Constantine, Lesley Kool, and Nicholas Van Klaveren

Acta Palaeontologica Polonica 46 (1), 2001: 113-118

The morphology of the single preserved molar of the holotype of the Australian Early Cretaceous (Aptian) mammal Teinolophos trusleri shows that it is a monotreme and probably a steropodontid, rather than a 'eupantothere' as originally proposed. The structure of the rear of the jaw of T. trusleri supports the molecular evidence that previously formed the sole basis for recognising the Steropodontidae as a distinct family.

Thomas H. Rich [ ], Museum Victoria, P.O. Box 666E, Melbourne, Victoria 3001, Australia; Patricia Vickers-Rich [prich @mail. earth. monash. edu. au ], Andrew Constantine [ ], and Lesley Kool[ ], Earth Sciences Department & Monash Science Centre, Monash University, Clayton, Victoria 3168, Australia; Peter Trusler, 9 Whitehorse Road, Blackburn, Victoria 3130, Australia; Timothy F. Flannery ], South Australian Museum, North Terrace, Adelaide, South Australia 5000, Australia; Richard Cifelli [ ], Oklahoma Museum of Natural History, 2401 Chautauqua, Norman, Oklahoma 7301 9-0606, USA; Nicholas van Klaveren [ ], 1/6 Lucerne Avenue, Mornington, Victoria 3931, Australia.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (for details please see, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.