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ABSTRACT: A fragmentary maxillar of a small anthracotheriid has been discovered in the middle Eocene locality of Kyawdaw in the Pondaung Formation (Myanmar). This specimen represents a primitive new species (Siamotherium pondaungensis, sp. nov.), possibly ancestral to Siamotherium krabiense from the late Eocene of Krabi (Thailand). The occurrence of S. pondaungensis in Myanmar suggests that Krabi is younger than the localities of the Pondaung Formation, and it further supports the role that southern Asia played in the origin and evolution of several groups of mammals.
Journal of Vertebrate Paleontology 01/2009; · 2.21 Impact Factor
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ABSTRACT: A new genus and species of anthropoid primate,Bahinia pondaungensis gen. et sp. nov., is described from the Yashe Kyitchaung locality in the Late Middle Eocene Pondaung Formation (Myanmar).
It is related to Eosimias, but it is represented by more complete remains, including upper dentition with associated lower jaw fragment. It is interpreted
as a new representative of the family Eosimiidae, which corresponds to the sister group of the Amphipithecidae and of all
other anthropoids. Eosimiidae are now recorded from three distinct Middle Eocene localities in Asia, giving support to the
hypothesis of an Asian origin of anthropoids.
Science 10/1999; 286(5439):528-530. · 31.20 Impact Factor
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ABSTRACT: A new genus and species of Anthracobunidae, Hsanotherium parvum, is described from the Middle Eocene Pondaung Formation in Myanmar. This form is the smallest and the most primitive known in the family, and it suggests that the Eocene South-Asian radiation of Anthracobunidae occurred in a diachronous way on the Indian Subcontinent and eastward.RésuméUn nouvel Anthracobunidae, Hsanotherium parvum gen. et sp. nov. de l'Eocène moyen de la Formation de Pondaung au Myanmar est décrit. Cette forme birmane est la plus petite et la plus primitive connue, et suggère que la radiation éocène des Anthracobunidae en Asie du Sud s'est déroulée de manière diachrone sur le sous-continent indien et plus à l'est.
Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science.
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ABSTRACT: Pondaungia cotteri is the largest primate known from the Late Middle Eocene Pondaung Formation, Myanmar. Its taxonomic status has been the subject of much debate because of the fragmentary nature of its remains. Initially described as an anthropoid, some authors recently have associated it with adapid primates. These debates have been fueled not only by the incompleteness of the fossils attributed to Pondaungia but also by the reticence of many authors to regard Asia as an important evolutionary theater for Eocene anthropoids. During the November 1998 Myanmar-French Pondaung Expedition, a right lower jaw was discovered that yields the most nearly complete dentition of Pondaungia cotteri ever found: it shows the complete horizontal ramus, alveoli for the second incisor and canine, three premolars, and three molars. The symphysis showed all characteristics of anthropoids but was unfused. The canine root is large, the first premolar is absent, and the second premolar is single-rooted, reduced, and oblique in the tooth row, as in anthropoids. The premolars show a reduced mesio-distal length compared with the tooth row, and their morphology is very similar to that of Amphipithecus mogaungensis. Therefore, the two Pondaung taxa appear to be closely related to each other, with Siamopithecus as their sister taxon.
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ABSTRACT: Two new species of Indomeryx are described from the Late Middle Eocene Pondaung Formation, central Myanmar. These two species differ from I. cotteri by their more primitive dental features, thus challenging the inclusion of Indomeryx in the new Pecora family Prodremotheridae. Despite poor knowledge of this genus, we rather suggest a basal position within ruminantia, close to Archaeomeryx with which it displays several affinities.RésuméDeux nouvelles espèces, appartenant au genre Indomeryx et provenant de la formation de Pondaung (fin de l’Éocène moyen), sont décrites. Ces deux espèces se distinguent d'Indomeryx cotteri par leurs caractères primitifs, et remettent ainsi en cause l'inclusion de ce genre au sein des Prodremotheridae (Pecora). En dépit des connaissances fragmentaires concernant Indomeryx, nous suggérons une position basale de ce genre au sein des ruminants, proche d'Archaeomeryx, avec lequel il présente des caractères en communs.
Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science.
