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1. chinaXiv:202108.00085 [pdf]

A cuboid bone of a large Late Miocene elasmothere from Qingyang, Gansu, and its morphological significance

ZHANG Xiao-Xiao; SUN Dan-Hui
Subjects: Biology >> Zoology

A cuboid specimen collected from the Late Miocene stratum at Qingyang, Gansu, China is described here. The size of the Qingyang specimen is comparatively huge, even larger than the average size of Elasmotherium caucasicum collected from Nihewan, Hebei, China. The morphology of the Qingyang specimen is identical to that of other specimens of Elasmotheriini; thus, the Qingyang specimen belongs to a huge elasmothere, most probably Sinotherium. By comparison with extant rhino species, the complex of the main body and the apophysis exhibit functional significance. The angle between the frontal plate of the cuboid and the main axis of the apophysis can suggest the ecological conditions occupied by an elasmothere. From analysis of the morphology of the cuboid, Sinotherium and the more derived elasmotheres probably lived in forested or wooded environments, differing from the previous hypothesis of their paleoenvironment.

submitted time 2021-08-11 From cooperative journals:《古脊椎动物学报》 Hits3721Downloads268 Comment 0

2. chinaXiv:201801.00104 [pdf]

A new species of Chilotherium (Perissodactyla, Rhinocerotidae) from the Late Miocene of Qingyang, Gansu, China

SUN Dan-Hui; LI Yu; DENG Tao
Subjects: Geosciences >> Geology

An adult skull with articulated atlas and an adult mandible, collected by Emile Licent in 1920 from the Late Miocene of Qingyang (Gansu, China), is recognized as a new species Chilotherium licenti sp. nov. These specimens possess typical characters of the genus Chilotherium, such as the strongly expanded mandibular symphysis, the huge and dagger-shaped i2s with an upturned medial flange, strongly constricted protocones, well-developed crochet and crista, and weakly developed parastyle folds and paracone ribs. Chilotherium licenti is characterized by the near absence of lingual and buccal cingula, and the medifossette on P2 to M2 forming by well-developed crochet and crista. The derived characters of the new species indicate that it is the highly specialized taxon of the genus Chilotherium, corresponding to MN12-13 of the Turolian in Europe. Based on a phylogenetic analysis of rhinocerotids, C. licenti from the Late Miocene is the most derived species in the known species of the Chilotherium lineage.

submitted time 2018-01-09 From cooperative journals:《古脊椎动物学报》 Hits5449Downloads1792 Comment 0

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