Bayn Dzak, site 2 [PMPE] (Cretaceous of Mongolia)

Also known as Polish-Mongolian Palaeontological Expeditions 2/3

Where: Omnogov, Mongolia (44.2° N, 103.7° E: paleocoordinates 41.8° N, 92.7° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Bayn Dzak Member (Djadokhta Formation), Late/Upper Campanian (83.5 - 70.6 Ma)

• one 10-m thick bed

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; poorly lithified, concretionary, brown, red, calcareous sandstone

• "orange to moderate reddish-brown sands, containing scattered small reddish-brown sandstone nodules, known as 'concretions'. The sands have practically no cement. The cement of the nodules is calcareous...The known thickness of this layer is about 10 metres. The sands are particularly unresistant to weathering because of their poor cementation. Locally thin layers of hard, cemented orange-pink sandstone occur within this horizon, in the Main Mammal Field"

Size class: macrofossils

Preservation: concretion

Collected by PMPE II-III in 1964-1965

Collection methods: quarrying, mechanical,

Primary reference: Z. Kielan-Jaworowska and K. Kowalski. 1965. Polish-Mongolian Palaeontological Expeditions to the Gobi Desert in 1963 and 1964. Bulletin de l'Académie Polonaise des Sciences, Cl. II 13(3):175-179 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 37013: authorized by Matthew Carrano, entered by Matthew Carrano on 23.02.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Dinosauria -
Dinosauria indet. dinosaur
eggs and nests
 Ornithischia - Ankylosauridae
Pinacosaurus grangeri2 Gilmore 1933 ornithischian
 Neornithischia -
Protoceratops andrewsi Granger and Gregory 1923 ornithischian
 Squamata - Polyglyphanodontidae
Adamisaurus magnidentatus n. gen. n. sp.3
Adamisaurus magnidentatus n. gen. n. sp.3 Sulimski 1972 lizard
ZPAL MgR-II/80 (holotype skull)
Mammalia
 Tribosphenida - Zalambdalestidae
Zalambdalestes sp. Gregory and Simpson 1926 eutherian
ZPAL MgM-I/4 (incomplete right lower jaw described by Kielan-Jaworowska 1969)
 Multituberculata - Sloanbaataridae
Sloanbaatar mirabilis n. gen. n. sp.1, Kamptobaatar kuczynskii n. gen. n. sp.1
Sloanbaatar mirabilis n. gen. n. sp.1 Kielan-Jaworowska 1969 multituberculate
Kamptobaatar kuczynskii n. gen. n. sp.1 Kielan-Jaworowska 1969 multituberculate
 Multituberculata - Djadochtatheriidae
Djadochtatherium sp., "Kryptobaatar dashzevegi n. gen. n. sp." = Kryptobaatar dashzevegi1, "Gobibaatar parvus n. gen. n. sp." = Kryptobaatar dashzevegi1
Djadochtatherium sp. Simpson 1925 multituberculate
"Kryptobaatar dashzevegi n. gen. n. sp." = Kryptobaatar dashzevegi1 Kielan-Jaworowska 1969 multituberculate
22 specimen according to Kielan-Jawaorowska & Hurum (1997), includes ZPAL MgM-I/21, MgM-I/8, MgM-I/10, MgM-I/52
"Gobibaatar parvus n. gen. n. sp." = Kryptobaatar dashzevegi1 Kielan-Jaworowska 1969 multituberculate