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Fossil Record A palaeontological open-access journal of the Museum für Naturkunde
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Volume 21, issue 2
Foss. Rec., 21, 291-299, 2018
https://doi.org/10.5194/fr-21-291-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Foss. Rec., 21, 291-299, 2018
https://doi.org/10.5194/fr-21-291-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 24 Oct 2018

Research article | 24 Oct 2018

First occurrence of Duboisia (Bovidae, Artiodactyla, Mammalia) from Thailand

Yuichiro Nishioka1 and Chavalit Vidthayanon2 Yuichiro Nishioka and Chavalit Vidthayanon
  • 1Waseda Institute for Advanced Study, Waseda University, Shinjuku, 169-8050, Japan
  • 2independent researcher: Bangkok, 10900, Thailand

Abstract. The first fossil record of Duboisia (Boselaphini, Bovidae) from Thailand confirms that this genus is no longer endemic to Java, Indonesia. The new fossil material is a calvarium with horn cores (older than the Middle Pleistocene) collected from a sandpit at Tha Chang, Nakhon Ratchasima Province, north-eastern Thailand. The present specimen is provisionally allocated to a species of Duboisia aff. D. santeng, which has weaker precornual ridges and anterior keels on the horn cores than D. santeng from Early and Middle Pleistocene deposits of Java, but these species share basic characteristics of horn cores as follows: the lower half inclined backwards; the upper half curved upwards; cross section rounded triangular, antero-posteriorly compressed, and with medial and lateral keels. Morphological similarities between D. aff. santeng and D. santeng support a strong faunal interchange between continental South East Asia and Java before the Middle Pleistocene, and suggest that the genus Duboisia diverged from the other genera of Boselaphini in the Siva-Malayan region.

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Duboisia santeng is an extinct Indonesian antelope with short horn cores that sprout up like bunny-ears. A newly discovered skull of Duboisia from north-eastern Thailand confirms that the genus is no longer endemic to Indonesia, and supports a strong faunal interchange between the South East Asian continent and islands before or at the beginning of the Pleistocene.
Duboisia santeng is an extinct Indonesian antelope with short horn cores that sprout up like...
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