A summary of the Pondaung fossil expeditions

Abstract

We briefly summarize the fossil expeditions of the Eocene Pondaung Formation of central Myanmar by the Kyoto University field parties with Myanmar researchers during the field seasons of 1998-2003. We briefly report our contributions to the study on the Pondaung fossils, providing locality data, a list of the Pondaung vertebrate fauna, comments of the repositories of the specimens, and specimen lists, with references of the studies on the Pondaung Formation and Pondaung fossils. The Pondaung vertebrate fauna currently consists of three species of fishes (three orders and three families), 16 species of reptiles (three orders and 10 families), one species of birds, and 53 species of mammals (seven orders and 25 families). The age of the Pondaung fauna is determined as the late middle Eocene by the geological and microfossil evidence. The paleoenvironment of the Pondaung fauna is estimated to be forested/woodland vegetation with humid/subhumid moisture and large rivers, which were located not far from seashore. The Pondaung mammalian fauna includes many artiodactyl taxa compared to other middle Eocene faunas of East Asia and shows relatively high endemism at the generic level among the contemporaneous mammalian faunas of East Asia. The Pondaung fauna includes several mammalian taxa that indicate migration between Eocene Southeast Asia and Eocene western Eurasia/North Africa.