期刊
ALCHERINGA
卷 37, 期 4, 页码 435-441出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/03115518.2013.770221
关键词
Australovenator wintonensis; Rapator ornitholestoides; metacarpal; theropods
类别
资金
- Queensland Xray Mackay
- Australian Age of Dinosaurs Natural History Museum
- Queensland Museum
- Natural History Museum of United Kingdom
- University of Newcastle
Various comparisons of left metacarpal I of the Australovenator wintonensis holotype have been made with Rapator ornitholestoides. These specimens were identified as being morphologically more similar than either was to that of the neovenatorid Megaraptor namunhuaiquii. Owing to the poor preservation of A. wintonensis and R. ornitholestoides, distinct morphological separation between the two appeared minimal. The recent discovery of a near perfectly preserved right metacarpal I of A. wintonensis enables a direct and accurate comparison with R. ornitholestoides. Distinct morphological differences exist between the metacarpals of the two species. A re-evaluation of the age of the A. wintonensis holotype site (AODL 85 'Matilda Site') with zircon dating reveals a maximum age of 95 Ma, 10 Ma younger than the Griman Creek Formation at Lightning Ridge, from which R. ornitholestoides was recovered. This age difference detracts from the probability that the specimens belong to the same genus.
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