First occurrence of <i>Duboisia</i> (Bovidae, Artiodactyla, Mammalia) from Thailand

• Main Authors: Y. Nishioka, C. Vidthayanon
• Format: Article
• Language: English
• Published: Copernicus Publications 2018-10-01
• Series: Fossil Record
• Online Access: https://www.foss-rec.net/21/291/2018/fr-21-291-2018.pdf

<p>The first fossil record of <i>Duboisia</i> (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 <i>Duboisia</i> aff. <i>D. santeng</i>, which has weaker precornual ridges and anterior keels on the horn cores than <i>D. santeng</i> 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 <i>D</i>. aff. <i>santeng</i> and <i>D. santeng</i> support a strong faunal interchange between continental South East Asia and Java before the Middle Pleistocene, and suggest that the genus <i>Duboisia</i> diverged from the other genera of Boselaphini in the <q>Siva-Malayan</q> region.</p>