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1. chinaXiv:202004.00004 [pdf]

A Late Miocene Huerzelerimys (Rodentia: Muridae) skull?from Hezheng, Gansu, China

WANG Ban-Yue; QIU Zhan-Xiang; ?LI Lü-Zhou
Subjects: Biology >> Zoology

A skull with mandible and several cervicals of a new species of Huerzelerimys, H.asiaticus, collected from the Late Miocene Liushu Formation in Linxia Basin, Gansu Province,is described in this paper. The skull is the first one ever found for the genus Huerzelerimys. Its?main characters are: size small; skull broad and short with stout rostrum; interorbital roof narrow;premaxillary laterodorsal crest well developed; frontal crests weak and subparallel; incisive?foramina long, with their posterior ends lined up with anterior root of M1; posterior palatal?foramina located mesial to M2; caudal border of hard palate lying posterior to M3;interpterygoid?foramen absent; alisphenoid canal bony; bulla large and inflated; internal carotid foramen located?near the basilar tubercle; mandible having low horizontal ramus and deeply concave diastema;?anterior end of masseteric ridge lined up with anterior margin of m1; mental foramen situated?slightly anterior to masseteric ridge and anteroventral to m1, near to mandibular diastema; upper?incisors orthodont; M1 having slightly anteriorly located t1; in M1 and M2 t6 and t9 connected by?distinct crest and t12 crest-like; t1 and t3 of M2 and t1 of M3 connected to t5; M3 having t3 and?a large isolated t8; small Acc of m1 connected with both Alc and Abc; m1 and m2 having distinct?buccal cingula, larger c2 attached to protoconid, and low crest-like posterior heel; m2 and m3?having isolated Abc; c1 absent in m3. The evolutionary level of the described skull tends to show?that the age of the upper part of the Liushu Formation yielding H. asiaticus may belong to late Bahean, corresponding to European upper MN11 or lower MN12.

submitted time 2020-03-31 From cooperative journals:《古脊椎动物学报》 Hits6657Downloads1250 Comment 0

2. chinaXiv:201908.00118 [pdf]

Five new species of Arvicolinae and Myospalacinae from the?Late Pliocene?Early Pleistocene of Nihewan Basin

ZHENG Shao-Hua; ZHANG Ying-Qi; ?CUI Ning
Subjects: Biology >> Zoology

The Nihewan Basin has been well known for its Cezonoic fossiliferous fluviolacustrine deposits and paleolithic sites for almost a century. There have been considerable research efforts devoted to the understanding of the geology, chronology, and stratigraphy of this?complex of sedimentary body. The current fundamental problem lies in the chronological aspect?of the Nihewan Beds. Arvicolinae and Myospalacinae are two groups of rodents characterized?by rapid evolutionary rates and quantifiable evolutionary trends, and hence particularly helpful?in Late Cenozoic biostratigraphic correlations. Therefore, we briefly describe three new species?of Arvicolinae and two new species of Myospalacinae that mainly came from the selected?sections in the Nihewan Basin. Hopefully, they would contribute towards the establishment of the?biostratigraphic framework of the Nihewan Basin and provide new evidence on the chronological?understanding of the Nihewan Beds from an evolutionary point of view.

submitted time 2019-08-26 From cooperative journals:《古脊椎动物学报》 Hits9205Downloads1673 Comment 0

3. chinaXiv:201804.01251 [pdf]

Fossil gibbons (Mammalia, Hylobatidae) from the Pleistocene of Chongzuo, Guangxi Zhuang Autonomous Region, China

ZHANG Ying-Qi; JIN Chang-Zhu; WANG Yuan; Alejandra ORTIZ; HE Kai; Terry HARRISON
Subjects: Geosciences >> Geology

Recent fieldwork at Pleistocene cave sites in the Chongzuo area in Guangxi Zhuang Autonomous Region has yielded 33 isolated teeth of fossil hylobatids. Comparisons indicate that the teeth can all be referred to a single species of Nomascus, but the material is insufficient to assign it to a particular species. The molars are slightly larger on average than those of extant species of Nomascus, but unlike contemporary great apes from the Pleistocene of southern China, the hylobatids do not seem to have undergone a change in dental size through time. Nomascus is not present in the Chongzuo area today, but historical records indicate that the genus may have been widely distributed across southern China in the recent past.

submitted time 2018-04-04 From cooperative journals:《古脊椎动物学报》 Hits5963Downloads1719 Comment 0

4. chinaXiv:201801.00584 [pdf]

Postcranial morphology of Middle Eocene deperetellid Teleolophus (Perissodactyla, Tapiroidea) from Shara Murun region of the Erlian Basin, Nei Mongol, China

BAI Bin; WANG Yuan-Qing; MENG Jin
Subjects: Geosciences >> Geology

Deperetellidae are a group of common, endemic Asian Middle Eocene tapiroids. Although five genera within the family have been named, most of them were represented by fragmentary maxillae and mandibles except for some skeletal material of Deperetella. Based exclusively on dental characters, different authors have proposed affinities of deperetellids with, for instance, helaletid Colodon, lophialetids, or rhodopagids. Here we described the partial postcranial skeleton of Teleolophus medius? recently discovered at Wulanhuxiu (=Ulan Shireh) of the Erlian Basin, China, and compared the postcranial skeletons of Teleolophus with those of Lophialetes, Deperetella, Heptodon, Helaletes, and Colodon. The postcranial skeleton of Teleolophus shares many similarities with that of Deperetella especially in having elongated and slender limbs, a relatively long, narrow lunar with a slightly concave medial border of the radial facet, a magnum with an anteriorly situated hump and a deeply excavated Mc IV facet, Mc II not elevated above Mc III, a slightly asymmetric trochlea of the femur, a fibula highly reduced or even fused with a tibia, Mt III contacting the cuboid, Mt II in contact with ectocuneiform only on the posterior end, and the manus and pes with functional tridactyls. These similarities support the close relationship between Teleolophus and Deperetella. We interpreted some similarities of postcrania between Teleolophus and Lophialetes as a result of parallel evolution, due to their cursorial adaptations. Colodon is more similar to Heptodon than to Teleolophus in the postcranial features, suggesting a close relationship between Colodon and Heptodon. Whether or not Helaletidae and Deperetellidae are closely related await further investigation. Both morphological characters and ternary diagram indicate that Teleolophus adapted to fast running, as its contemporary Lophialetes.

submitted time 2018-01-25 From cooperative journals:《古脊椎动物学报》 Hits5882Downloads2084 Comment 0

5. chinaXiv:201711.01918 [pdf]

Cyprinus-like pharyngeal bones and teeth (Teleostei, Cypriniformes, Cyprinidae) from the Early–Middle Oligocene deposits of South China

CHEN Geng-Jiao; CEN Li-Di; LIU Juan
Subjects: Biology >> Zoology

Here we describe ?Nanningocyprinus wui gen. et sp. nov, a fossil Cyprinus-like fish from the Early-Middle Oligocene deposits of Langdong, Nanning Basin, Guangxi Province, South China. ?Nanningocyprinus wui is represented by a number of pharyngeal bones and teeth. It differs from all other cyprinid fishes in the following character combination: tooth formula —3·2·1, crushing molar-like A1 much larger than A2, only one groove on the grinding surface of A2 and B1 respectively, and the anterior angle of the pharyngeal bone triangular and prominent. The new-found Cyprinus-like fish, along with the previously known Late Eocene ?Eoprocypris maomingensis (Procypris-like) and Oligocene ?Huashancyprinus robustispinus (Cyprinus-like) from South China, further indicates an early branching and diversification of the Cyprininae (Cyprinidae) in this area.

submitted time 2017-11-07 From cooperative journals:《古脊椎动物学报》 Hits1145Downloads669 Comment 0

6. chinaXiv:201708.00169 [pdf]

Cyprinus-like pharyngeal bones and teeth (Teleostei, Cypriniformes, Cyprinidae) from the Early–Middle Oligocene deposits of South China

CHEN Geng-Jiao; CEN Li-Di; LIU Juan
Subjects: Geosciences >> Geology

Here we describe ?Nanningocyprinus wui gen. et sp. nov, a fossil Cyprinus-like fsh from the Early-Middle Oligocene deposits of Langdong, Nanning Basin, Guangxi Province,South China. ?Nanningocyprinus wui is represented by a number of pharyngeal bones and teeth.It differs from all other cyprinid fishes in the following character combination: tooth formula—3·2·1, crushing molar-like A1 much larger than A2, only one groove on the grinding surface of A2 and B1 respectively, and the anterior angle of the pharyngeal bone triangular and prominent.The new-found Cyprinus-like fsh, along with the previously known Late Eocene ?Eoprocypris maomingensis (Procypris-like) and Oligocene ?Huashancyprinus robustispinus (Cyprinus-like)from South China, further indicates an early branching and diversification of the Cyprininae(Cyprinidae) in this area

submitted time 2017-08-08 From cooperative journals:《古脊椎动物学报》 Hits1675Downloads933 Comment 0

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