Mergen (Quarry 1) (Eocene of Mongolia)

Where: Mongolia (43.6° N, 109.6° E: paleocoordinates 45.0° N, 103.3° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Middle Eocene (47.8 - 37.7 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

Collected by Mongolian Academy of Sciences and American Museum of Natural History in 1981-1983 and 1991-1992

Collection methods: bulk,

Primary reference: D. Dashzeveg and J. Meng. 1998. New Eocene ctenodactyloid rodents from the Eastern Gobi Desert of Mongolia and a phylogenetic analysis of ctenodactyloids based on dental features. American Museum Novitates 3246 :1-20 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 174909: authorized by Philip Mannion, entered by Philip Mannion on 30.11.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Acreodi - Mesonychidae
Harpagolestes cf. orientalis1 Szalay and Gould 1966 condylarth
 Perissodactyla - Lophialetidae
Lophialetes expeditus Matthew and Granger 1925 odd-toed ungulate
PSS 41/4-6 and 60-65
 Perissodactyla -
Rhinocerotoidea indet.2 Gray 1821 odd-toed ungulate
PSS 41-67
 Perissodactyla - Hyracodontidae
Ardynia sp.2 Matthew and Granger 1923 odd-toed ungulate
PSS 41-66
Triplopus mergenensis n. sp.1 Dashzeveg 1991 odd-toed ungulate
PSS 41-1 - type; referred material: PSS 41-2
 Perissodactyla - Helaletidae
"Irdinolophus mongoliensis" = Desmatotherium mongoliense2
"Irdinolophus mongoliensis" = Desmatotherium mongoliense2 Osborn 1923 odd-toed ungulate
PSS 41-3
 Perissodactyla -
Breviodon minutus odd-toed ungulate
 Artiodactyla - Helohyidae
Gobiohyus sp.1 Matthew and Granger 1925 even-toed ungulate
 Theriamorpha - Changlelestidae
Zaraalestes sp. Storch and Dashzeveg 1997 placental
 Lagomorpha - Leporidae
Gobiolagus sp. Burke 1941 rabbit
 Rodentia - Gobiomyidae
Mergenomys orientalis n. gen. n. sp.
Mergenomys orientalis n. gen. n. sp. Dashzeveg and Meng 1998 rodent
PSS 41/43 - holotype; referred material: PSS 41/23
 Rodentia -
Yuomys sp. Li 1975 rodent
Aves
 Gruiformes - Eogruidae
Eogrus sp.1 Wetmore 1934 bird