Yarshe, Pondaung Sandstone (Eocene of Myanmar)

Also known as Bh1 (of Kyoto University)

Where: Myanmar (21.7° N, 94.6° E: paleocoordinates 13.0° N, 93.1° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Pondaung Formation, Bartonian (41.3 - 38.0 Ma)

• The whole sequence of units was originally defined as the ‘Pondaung Sandstones’ by Cotter (1914), but the horizon yielding Eocene vertebrate fossils is now known as the ‘Upper Member’ of the Pondaung Formation (see Maung et al. 2005). The most recent age for this unit is ~39–38 Ma and so it can be regarded as middle Bartonian (see Tsubamoto et al. 2011).

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; brown, yellow sandstone and brown, red mudstone

• fossils come from a dark red-brown mudstone

Size class: macrofossils

Collection methods: specimens held at National Museum of Myanmar

Primary reference: R. L. Ciochon, P. D. Gingerich, G. F. Gunnell and E. L. Simons. 2001. Primate postcrania from the late middle Eocene of Myanmar. Proceedings of the National Academy of Sciences 98(14):7672-7677 [J. Alroy/E. Leckey/E. Leckey]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 41333: authorized by John Alroy, entered by Erin Leckey on 13.07.2004, edited by Takehisa Tsubamoto and K. Christopher Beard

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Primates - Amphipithecidae
"Amphipithecus mogaungensis" = Pondaungia cotteri, Myanmarpithecus yarshensis n. gen. n. sp.3
"Amphipithecus mogaungensis" = Pondaungia cotteri Pilgrim 1927 monkey
NMP 7 complete jaw
Myanmarpithecus yarshensis n. gen. n. sp.3 Takai et al. 2001 monkey
NMMP-KU 0001, upper and lower teeth
 Rodentia - Anomaluridae
Pondaungimys anomaluropsis n. gen. n. sp.1 Dawson et al. 2003 scaly-tailed squirrel
 Hyaenodonta - Hyaenodontidae
Yarshea cruenta n. gen. n. sp.2
Yarshea cruenta n. gen. n. sp.2 Egi et al. 2004 eutherian