Artiodactyla from the Early Eocene of southern Kazakhstan

Autor/innen

  • Alexander Verianov
  • Jörg Erfurt

Abstract

New mammal remains are preliminarily described from the Lower Eocene of southern Kazakhstan. These are (i) a distal joint of a humerus and (ii) a mandible fragment from the Zhylga 1b and Zhylga 2 locality, found in 1996 by the first author. The specimens are referred to artiodactyls based on morphological comparisons to other Lower and Middle Eocene material, particularly from the Geiseltal near Halle (Germany). The humerus probably belongs to a diacodexeid. It displays one of the earliest phylogenetic stages in the formation of the elbow characteristic for artiodactyls. It represents an intermediate evolutionary stage between the species of Diacodexis and North American genera of the Lower Eocene such as Bunophorus. This is a further biostratigraphical indication for the Eocene age of Zhylga 1b and Zhylga 2. Therefore the significance of the Kazakhstanian fossil sites for the mammal radiation is stressed.

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24.01.2024

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