Procoptodon browneorum Merrilees, 1968
Taxonomy & Nomenclature
Synonym/s: Sthenurus brownei Merrilees, 1968 (original combination); Simosthenurus browneorum Merrilees, 1968; Simosthenurus brownei Merrilees, 1968
Last record: Late Pleistocene (46ka or younger)
Provisionally placed in Procoptodon by most authors, but its true taxonomic affinities have not been settled. Subfossil remains have been reported from near Yanchep, Western Australia (Archer, 1972).
Subfossil remains of this species from a 33-27,000 year old layer have been uncovered from Tight Entrance Cave, southwestern Australia. However these may have been worked from older sedimentological levels, and further analysis is need to resolve their true age (Prideaux, 2007:17). There is a record from the nearby Kudjal Yolgah Cave dated to 46ka, which is securely dated. Hence a minimum extinction date of 46ka is established regardless of whether the 33-27ka record is valid or not.
Anatomy & Morphology
It weighed an estimated 50kg (Johnson, 2006:18) or 60kg (Johnson & Prideaux, 2004:557).
Biology & Ecology
It was a browser or a mixed feeder (Johnson, 2006:18).
Original scientific description:
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Ayliffe, L. K., G. J. Prideaux, M. I. Bird, R. Grün, R. G. Roberts, G. A. Gully, R. Jones, L. K. Fifield, and R. G. Cresswell. 2008. Age constraints on Pleistocene megafauna at Tight Entrance Cave in southwestern Australia. Quaternary Science Reviews 27: 1784-1788.
Balme, J. M., D. Merrilees, and J. K. Porter. 1978. Late Quaternary mammal remains, spanning about 30,000 years, from excavations in Devil's Lair, Western Australia. Journal of the Royal Society of Western Australia 61: 33-65.
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