Université de Fribourg

A new species of Argyromys (Rodentia, Mammalia) from the oligocene of the valley of lakes (Mongolia): its importance for palaeobiogeographical homogeneity across Mongolia, China and Kazakhstan

López-Guerrero, Paloma ; Maridet, Olivier ; Zhang, Zhaoqun ; Daxner-Höck, Gudrun

In: PLOS ONE, 2017, vol. 12, no. 3, p. e0172733

We describe a new species of Rodentia (Mammalia), Argyromys cicigei sp. nov. from Toglorhoi (fossil bed TGW-A/2a) in Mongolia and Ulantatal (fossil beds UTL 1 and UTL 7) in China. Its tooth morphology differs from the type species Argyromys aralensis from Akespe in Kazakhstan by smaller size and simpler structures. Argyromys has been assigned in different families of Muroidea, such as...

Université de Fribourg

The record of Aplodontidae (Rodentia, Mammalia) in the Oligocene and Miocene of the Valley of Lakes (Central Mongolia) with some comments on the morphologic variability

Maridet, Olivier ; Daxner-Höck, Gudrun ; López-Guerrero, Paloma ; Göhlich, Ursula B.

In: Palaeobiodiversity and Palaeoenvironments, 2017, vol. 97, no. 1, p. 25–49

The present publication reports new discoveries of Oligocene and early Miocene aplodontid rodents from the Taatsiin Gol area (Valley of Lakes) in Mongolia. The fossil aplodontids recovered in this area are mainly composed of dental remains, some fragmentary jaws plus one partially preserved skull. Aplodontid rodents have been found from the early Oligocene (local biozone A) to the early...

Université de Fribourg

Oligocene and early Miocene mammal biostratigraphy of the Valley of Lakes in Mongolia

Harzhauser, Mathias ; Daxner-Höck, Gudrun ; Erbajeva, Margarita A. ; López-Guerrero, Paloma ; Maridet, Olivier ; Oliver, Adriana ; Piller, Werner E. ; Göhlich, Ursula B. ; Ziegler, Reinhard

In: Palaeobiodiversity and Palaeoenvironments, 2017, vol. 97, no. 1, p. 219–231

The Taatsiin Gol Basin in Mongolia is a key area for understanding the evolution and dispersal of Central Asian mammal faunas during the Oligocene and early Miocene. After two decades of intense fieldwork, the area is extraordinarily well sampled and taxonomically well studied, yielding a large dataset of 19,042 specimens from 60 samples. The specimens represent 176 species-level and 99...

Université de Fribourg

Cricetidae (Rodentia, Mammalia) from the oligocene of the valley of Lakes (Mongolia): the genera Aralocricetodon, Eocricetodon, Bagacricetodon, Witenia and Paracricetodon

López-Guerrero, Paloma ; Maridet, Olivier ; Daxner-Höck, Gudrun

In: Palaeobiodiversity and Palaeoenvironments, 2017, vol. 97, no. 1, p. 93–109

We describe the remains of Aralocricetodon Bendukidze, 1993; Bagacricetodon Gomes Rodrigues et al., 2012; Eocricetodon Wang, 2007; Witenia de Bruijn et al., 2003 and Paracricetodon Schaub, 1925 (Cricetidae, Rodentia, Mammalia) from the Taatsiin Gol and Taatsiin Tsagaan Nuur areas (Mongolia). The studied material (comprising 128 teeth) stems from 9 localities and 23 fossil layers spanning a...

Université de Fribourg

Osteology, relationships, and ecology of Annemys (Testudines, Eucryptodira) from the Late Jurassic of Shar Teg, Mongolia, and phylogenetic definitions for Xinjiangchelyidae, Sinemydidae, and Macrobaenidae

Rabi, Márton ; Sukhanov, Vladimir B. ; Egorova, Vera N. ; Danilov, Igor ; Joyce, Walter G.

In: Journal of Vertebrate Paleontology, 2014, vol. 34, no. 2, p. 327–352

A complete description of the xinjiangchelyid turtles Annemys levensis and A. latiens is provided, based on all available material from the Upper Jurassic type locality of Shar Teg, Mongolia. Annemys latiens was previously known almost exclusively from shell material, but an undescribed skull from Shar Teg is referable to this species and its distinct morphology confirms the presence of two taxa...

Université de Fribourg

A new specimen of Manchurochelys manchoukuoensis from the Early Cretaceous Jehol Biota of Chifeng, Inner Mongolia, China and the phylogeny of Cretaceous basal eucryptodiran turtles

Zhou, Chang-Fu ; Rabi, Márton ; Joyce, Walter G.

In: BMC Evolutionary Biology, 2014, vol. 14, no. 1, p. 77

Background: Manchurochelys manchoukuoensis is an emblematic turtle from the Cretaceous Yixian Formation of Liaoning, China, a geological rock unit that is famous for yielding perfectly preserved skeletons of fossil vertebrates, including that of feathered dinosaurs. Manchurochelys manchoukuoensis was one of the first vertebrates described from this fauna, also known as the Jehol Biota. The...