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Hezheng Chengguanzhen, China

Wang S.,CAS Institute of Vertebrate Paleontology and Paleoanthropology | He W.,Hezheng Paleozoological Museum | Chen S.,Hezheng Paleozoological Museum
Acta Palaeontologica Polonica | Year: 2013

In this paper, we report on abundant fossils of Platybelodon from the Middle Miocene of the Linxia Basin, China. Most of the fossils were discovered at two localities (Laogou and Zengjia) in the upper Middle Miocene Hujialiang Formation, and possess derived characters for the genus, including a relatively slender upper incisor, the development of a transverse ledge on the narrowest part of the mandibular symphysis, narrow, elongate and hypsodont third molars, the development of fourth loph(id)s on the second molars, and the development of small enamel conules and cementum in the interloph(id)s. Following comparisons with other Eurasian platybelodonts, we assign these remains to Platybelodon grangeri, and demonstrate that they are morphologically intermediate between P. grangeri from the Tunggurian localities of Tarim Nor and Platybelodon Quarry in Inner Mongolia. We suggest that the locality of Laogou may be younger than that of Zengjia, based on the occurrence of platybelodonts showing a suite of more derived characters. In addition, we assign two further specimens of Platybelodon from the lower Middle Miocene Dongxiang Formation of the Linxia Basin to Platybelodon danovi, owing to their retention of plesiomorphic characters distinguishing them from other Linxia Platybelodon fossils. Based on a cladistic analysis, we propose an evolutionary sequence of platybelodonts in Eurasia, and discuss potential functional adaptations. © 2013 S. Wang et al.

Shi Q.,CAS Institute of Vertebrate Paleontology and Paleoanthropology | He W.,Hezheng Paleozoological Museum | Chen S.,Hezheng Paleozoological Museum
Zootaxa | Year: 2014

A new species of the bovid Shaanxispira, from the upper Miocene deposits of the Linxia Basin, Gansu Province, China, is described here. Shaanxispira is endemic to Northern China and was previously known only from the Lantian area, Shaanxi Province, by two species, S. chowi and S. baheensis. The new species, S. linxiaensis nov. sp., is of early Bahean in age, slightly older than the species from the Lantian area. The horn-cores of the new species are more derived, with large wing-shaped antero-medial keels, suggesting the occurrence of a different lineage of Shaanxispira in the Linxia Basin. Although Shaanxispira has homonymously twisted horn-cores, it is not closely related to other late Miocene bovids with homonymously twisted horn-cores, like Oioceros and Samotragus. Its phylogenetic status is still in debate, but might be more closely related to the late Miocene "ovibovines." Copyright © 2014 Magnolia Press.

Wang S.,CAS Institute of Vertebrate Paleontology and Paleoanthropology | Wang S.,Chinese Academy of Sciences | Wang S.,CAS Nanjing Institute of Geology and Palaeontology | Shi Q.Q.,CAS Institute of Vertebrate Paleontology and Paleoanthropology | And 4 more authors.
Geodiversitas | Year: 2016

Here we describe a new species of Konobelodon Lambert, 1990 – a poorly known tetralophodont shovel-tusked proboscidean – from the Late Miocene of the Linxia Basin, China. Detailed osteological anatomies of skulls, teeth, and partial postcranial bones of the new taxon, Konobelodon robustus n. sp., are described and detailed morphological comparisons with the other species of Konobelodon (K. atticus (Wagner, 1857) = Mastodon grandincisivus, Schlesinger 1917, and K. britti (Lambert, 1990)) and other gomphotheres are conducted. The skull and jaw-closing muscles of a juvenile individual of the new species are reconstructed and the body mass is estimated based on its limb bones. Phylogenetic analysis of genera within Elephantimorpha results in three most parsimonious trees, of which two support a sister-group relationship between Konobelodon and Platybelodon, within a monophyletic Amebelodontinae. The new results enhance our knowledge on the anatomy and phylogeny of Konobelodon, and indicate pronounced diversification and strong parallel evolution in the amebelodontines. © Publications scientifiques du Muséum national d’Histoire naturelle, Paris.

Chen S.-K.,Chongqing Three Gorges University | Chen S.-K.,CAS Institute of Vertebrate Paleontology and Paleoanthropology | Deng T.,CAS Institute of Vertebrate Paleontology and Paleoanthropology | Pang L.-B.,Chongqing Three Gorges University | And 3 more authors.
Geobios | Year: 2012

Though rarely found, chalicotheres have long been considered as indicators of wooded environment because of their unique anatomical structure and inferred ecological habits. A juvenile skull of a chalicothere with its articulated mandible was unearthed from the Duikang locality, Guanghe County, Gansu Province, China. This specimen can be identified as Ancylotherium sp. based on its short symphysis, shallow mandible, high crown and large size of upper molars, obvious crochets on upper milk teeth, complex structure of DP2 and dp2, and developed metastylids on the lower milk teeth. This rare skull differs from all other known species of the genus Ancylotherium. Nonetheless, existence of Ancylotherium in China is confirmed without doubt; at least five species in China (from Gansu, Sichuan, Shanxi and Shaanxi provinces respectively) can be attributed to this genus. Ancylotherium and its contemporaneous faunal components at the Duikang locality, together indicate a subarid steppe environment with small patches of forest in the Linxia Basin during the Early Pliocene. © 2012 Elsevier Masson SAS.

Hou S.K.,CAS Institute of Vertebrate Paleontology and Paleoanthropology | Deng T.,CAS Institute of Vertebrate Paleontology and Paleoanthropology | He W.,Hezheng Paleozoological Museum | Chen S.Q.,Hezheng Paleozoological Museum
Science China Earth Sciences | Year: 2014

The skull and mandible of a Late Miocene fossil pig, Chleuastochoerus, are compared morphologically with those of extant pigs and peccaries, and subjected to a functional analysis. The presence of a rostral bone in the skull and relatively strong rostral muscles indicates that Chleuastochoerus possessed considerable digging ability, though the relatively narrow occipital surface and the shortness of the skull would have restricted the range of motion through which the skull could be swung. The distinctive pre-zygomatic plate and over-canine arch-niche may have played a role in protecting the skull and canines during digging. The massive masticatory muscles, reconstructed based on well-developed parietal and zygomatic crests, would have enabled the mouth to close quickly and contributed to moving the mandible both longitudinally and laterally. The configuration of the cranio-mandibular joint and its relatively high position show clearly that Chleuastochoerus was capable of both crushing and grinding movements during mastication. The comparatively simple structure of the crown surfaces of the cheek teeth suggests that the food of Chleuastochoerus may have been softer than that of extant suids. The diet of Chleuastochoerus is postulated to fall between those of true forest pigs and open habitat pigs, and the habitat of Chleuastochoerus to be relatively humid forest edge or nearby areas of open steppe. © 2013 Science China Press and Springer-Verlag Berlin Heidelberg.

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