Pangan 1, Pondaung Sandstone (Eocene of Myanmar)

Where: Myanmar (21.7° N, 94.8° E: paleocoordinates 13.0° N, 93.2° E)

• coordinate estimated from map

• 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 and G. Cotter, specimens housed in the Geological Museum, Calcutta

Primary reference: G. E. Pilgrim and G. P. Cotter. 1916. Some newly discovered Eocene mammals from Burma. Records of the Geological Survey of India 47:42-77 [J. Alroy/E. Leckey/E. Leckey]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 41110: authorized by John Alroy, entered by Erin Leckey on 06.07.2004, edited by Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Perissodactyla - Brontotheriidae
Sivatitanops cotteri2 Pilgrim 1925 brontothere
last upper premolar
 Tribosphenida - Helohyidae
"Siamotherium pondaungensis" = Pakkokuhyus lahirii4
"Siamotherium pondaungensis" = Pakkokuhyus lahirii4 Pilgrim 1928 placental
NMMP-PGN-293
 Hyaenodonta - Hyaenodontidae
Propterodon panganensis n. sp.1 de Bonis et al. 2018 eutherian
NMMP-Pg1-2011-29 - type
 Artiodactyla - Anthracotheriidae
"Anthracokeryx moriturus" = Anthracotherium crassum3
"Anthracokeryx moriturus" = Anthracotherium crassum3 Pilgrim and Cotter 1916 anthracothere
upper molars
 Artiodactyla - Lophiomerycidae
Indomeryx arenae n. sp.3 Pilgrim 1928 ruminant
fragment of mandibular ramus containing the hinger half of m3