Thadut, Pondaung Sandstone (Eocene of Myanmar)

Where: Myanmar (21.8° N, 94.7° E: paleocoordinates 13.0° N, 93.1° E)

• coordinate based on nearby landmark

• 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).

• formation-level stratigraphic resolution

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

• successive beds of cherry-red, bright buff and cream-white earths interstratified with brown or buff sandstones

Size class: macrofossils

Collection methods: collected by H. M. Lahiri, specimens housed in the Geological Museum, Calcutta

Primary reference: G. E. Pilgrim. 1925. The Perissodactyla of the Eocene of Burma. Memoirs of the Geological Survey of India 8(3):1-28 [J. Alroy/E. Leckey/E. Leckey]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 41108: authorized by John Alroy, entered by Erin Leckey on 06.07.2004, edited by Takehisa Tsubamoto

Creative Commons license: CC BY (attribution)

Taxonomic list

 Creodonta - Hyainailouridae
Orienspterodon dahkoensis Chow 1975 creodont
NMMP-KU 0261, 0262
 Perissodactyla - Deperetellidae
"? Chasmotherium birmanicum n. sp." = Bahinolophus birmanicus
"? Chasmotherium birmanicum n. sp." = Bahinolophus birmanicus Pilgrim 1925 odd-toed ungulate
two mandibular rami, belonging to the same individual and each containing the three molars and the last premolar