Mogaung Northwest (Eocene of Myanmar)

Also known as Pondaung; Thandaung kyitchaung; Than Daung Kyitchaung; Tdg; UCMP V78090

Where: Myanmar (22.0° N, 94.5° E: paleocoordinates 13.1° N, 92.9° E)

• coordinate based on unpublished field data

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 red, blue mudstone

• fossils come out of reddish to purplish mudstone (Hutchison et al.) or from "greyish yellow, grey and red claystones" (Maw et al.)

Size class: macrofossils

Collected in 1978; reposited in the UCMP

Collection methods: surface (float),

• comments: "...[specimens reported in this article] have been collected over the past 80 yrs. As a consequence, most specimens have limited, descriptive locality data that provides locations based on distances from known villages. Recent fieldwork has provided detailed, GPS based mapping of the most productive outcrops and permit us to place most of the historic localities in a more accurate and stratigraphically detailed framework." Yet they only place a few localities on the figured map. EL

Primary reference: J. H. Hutchison, P. A. Holroyd, and R. L. Ciochon. 2004. A preliminary report on southeast Asia's oldest Cenozoic turtle fauna from the late middle Eocene Pondaung Formation, Myanmar. Asiatic Herpetological Research 10:38-52 [J. Alroy/E. Leckey/E. Vlachos]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 41456: authorized by John Alroy, entered by Erin Leckey on 14.07.2004, edited by Jason Head, John Alroy, Philip Mannion and Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• fossil wood is commonly found
Mammalia
 Placentalia -
Rodentia indet.4 Bowdich 1821 rodent
 Primates - Amphipithecidae
"Amphipithecus moggaungensis" = Pondaungia4, Pondaungia cotteri3
"Amphipithecus moggaungensis" = Pondaungia4 monkey
Pondaungia cotteri3 Pilgrim 1927 monkey
 Perissodactyla - Brontotheriidae
Sivatitanops birmanicum4 Pilgrim and Cotter 1916 brontothere
 Perissodactyla - Indolophidae
Indolophus guptai4 Pilgrim 1925 odd-toed ungulate
 Perissodactyla - Amynodontidae
Metamynodon cotteri4 odd-toed ungulate
 Artiodactyla - Anthracotheriidae
Anthracokeryx tenuis4 Pilgrim and Cotter 1916 anthracothere
Anthracotherium pangan4 Pilgrim and Cotter 1916 anthracothere
 Artiodactyla - Lophiomerycidae
"Indomeryx cotteri" = Indomeryx cotteri4, "Indomeryx pilgrimi" = Indomeryx cotteri4
"Indomeryx cotteri" = Indomeryx cotteri4 Pilgrim 1928 ruminant
"Indomeryx pilgrimi" = Indomeryx cotteri4 Pilgrim 1928 ruminant
 Artiodactyla -
Thandaungia tini n. gen. n. sp.4
Thandaungia tini n. gen. n. sp.4 ruminant
TDG 5 - holotype
 Creodonta -
Kyawdawia lupina5 Egi et al. 2005 creodont
 Insectivora -
Insectivora indet.4 Bowdich 1821 insectivoran
Reptilia
 Testudines -
Testudinoidea indet. Gray 1825 turtle
 Testudines - Carettochelyidae
Anosteira sp., "Burmemys magnifica" = Allaeochelys magnifica
Anosteira sp. Leidy 1871 turtle
"Burmemys magnifica" = Allaeochelys magnifica Hutchison et al. 2004 turtle
 Testudines - Trionychidae
Trionychinae "large" Gray 1825 softshell turtle
 Squamata -
Colubroidea indet.2 Oppel 1811 snake
Barbaturex morrisoni1 Head et al. 2013 squamates