Table of Content

15 September 2005, Volume 43 Issue 03

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A NEW GENUS OF EUGALEASPIDS (GALEASPIDA, AGNATHA) FROM THE SLURIAN OF ANJI, ZHEJIANG, CHINA

GAI ZhIkun, ZHU Min

2005, 43(03):  165-174. 

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A new genus of the Eugaleaspiformes ( Galeaspida) , Anjiaspis is described in this paper. Fossil materials were discovered from the Maoshan Forrnation ( Wenlockian, Silurian) of Anji county, Zhejiang Province, China.

A NEW GENUS OF SAUROPOD FROM ZIGONG，SICHUAN

YE Yong, GAO Yuhui, JIANG Shan

2005, 43(03):  175-181. 

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A new juvenile individual of sauropod from the Upper Jurassic of Zigong, Sichuan, is described in this paper · Because the new specimen（ZDM0193）has some featules that evidently differs from the known sauropods, it is named a new genus and species— Daanosaurus Zhangi and included in Bellusaurinae. The diagnosis of the genus and species is summarized as follows : Teeth are spoon-shaped . Cervicals are slightly elongated . The axis is very short and high. The cervical centrum are opsithocoelous, with long and deep pleurocoels, but no ventral keels. Ibe cavities in cervicals are well developed. The cervical neural spines are low and prominently extend anteroposteriorly with straight upper borders . The neural spines of posterior cervicals are broad, but no forked. The anterior ends of the medial cervical ribs are forked. Dorsal vertebrae are opsithocoelous. The dorsal neural spines are broad and plate-like, but no forked. The anterior chevrons are distinctly Y-shaped and without closed haenal canal . Femur is long and straight, with greatly expanded proximal and distal end. fourth trochanter is well developed .

A PRIMITIVE ORNITHOPOD FROM THE EARLY CRETACEOUS QUANTOU FORMATION OF CENTRAL JILIN, CHINA

ZAN ShuQin, CHEN Jun JIN, Liyong, Ll Tao

2005, 43(03):  182-193. 

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A new ornithopod (Changchunsaurus parvus gen. et sp. nov . ) dinosaur is named and described on the basis of a specimen from the Early Cretaceous Quantou Formation at Liufangzi locality, Jilin Province, China. Ihe specimen represents the first primitive ornithopod taxon from the Cretaceous deposits in the Songliao Basin. Changchunsaurus is an interesting ornithopod in having a combination of primitive and derived characters. It shares with some ornithopod autopomorphies: paroccipital process is crescent-shaped, the jaw articulation offsets ventral to the maxillary tooth row . It shares with euomithopods the following synapomorphies: antorbital fenestra small, external mandibular fenestra absent. However, It is believed that Changchunsaurus is also more primitive than most of omithopods and marginocephalians in having five premaxillary teeth, a short edentulous anterior portion of premaxilla, a short diastema between premaxillary and maxilla teeth, the enamel on crowns of maxilla teeth and dentary teeth distribute symmetrically, and the premaxillary bill margin with that of the maxilla. Its jugal boss projects lateral face of the jugal. There is nubble structure on the lateral expansion of jugal, which is not described in other ornithopods. Changchunsaurus has a long predentary , which suggests it might have an immobile mandibular symphysis as in ceratopsians , and the predentary ventral process is longer than the lateral process. It is similar to derived omithopods in the morphology of the predentary with bilobate ventral pmcess end . Further work is needed to give precise phylogenetic relationship of the new omithopod .

NEW SCIURIDS FROM MIOCENE SHANWANG FORMATION , LINQU, SHANDONG

QIU Zhuding, YAN CuiLing

2005, 43(03):  194-207. 

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Three forms of Sciuridae, Tamiops asiaticus (Qiu, 1981) , Sciurus lii sp. nov. , and Oriensciurus linquensis gen. et sp. nov. are described from the early-middle Miocene Shanwang Formation at Linqu , Shandong Province. Comparisons of Tamiop asiaticus with Meinia asiatica Qiu, 1981 suggest that neither the size nor the morphology of the bodies and dentition allows the two genera to be distinguished. genus name Meinia Qiu, 1981 is therefore considered a junior synonym of Tamiops Allen, 1906. S . lii is one of the earliest records for the genus Sciurus. Some isolated teeth from the early Miocene locality Sihong, previously referred to Shuanggouia lui show similarities to S . lii and are assigred to the genus Sciurus in this paper. Redetermination of Shuanggouia argues convincingly for its assignment to Sciurinae rather than Petauristinae. Oriensciurus linquensis exhibits some charactas similar to Sciurus in the upper cheek teeth , and to Spermophilinus in the lower ones. The overall dental features, however, group the new genus with tree squirrels. ffhe Shanwang fossil sciurid association highly suggests the Shanwang area was a forest biotope during the Miocene, and indicates an obviously "Transitional Zone" between the modern Oriental Region and the Palearctic Region .

LATE MIOCENE BOSELAPHINI (BOVIDAE, ARTIODACTYLA) FROM FUGU, SHAANXI PROVNCE, CHINA

ZHANG Zhaoqun

2005, 43(03):  208-218. 

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Though rarely reported China, Miotragocerus has long been considered as one of the Vallesian equivalent indicators in the companion European faunas. Study on new specimens of Miltragocerus gregarius improves its diagnostic characters. Comparison with European and Pakistan taxa reveals that Miotragocerus possibly migrated into Eastern Asia 8 Ma，and evolved independently into Miotragocerus，which went extinct at the end of late Miocene together with some large bovids, such as all genera of Urmiatheriinae, due to dramatically climate and ecological changes at the end of the Late Miocene.

AGE STRUCTURE AND HABITAT OF THE RI-m•JOCEROS CHILOTHERWM DURNG THE LATE MIOCENE m TI-Æ LINXI.A BASN, GANSU, CHINA

LIANG Zhong, DENG Tao

2005, 43(03):  219-230. 

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Large mammals are very sensitive to climatic and environmental changes, and the composition of a fauna depends on the ecology and environment. As a result, knowing how the population is structured is very important when trying to understand envimnmental characteristics by studying mammal fossils. First, we found the percentages of each age group, then estimated the causes of death in each population, and finally classify the habitat of these animals. The Hipparion fauna from the Linxia Basin is very similar in composition to assemblages from Baode, Shanxi and Fugu , Shaanxi, with rhinoceroses as the most abundant mammalian fossil (Deng, 2002) . 'Ibe genus Chilotherium from northern China was first recorded by Ringstlürn (1924) , and it was the richest during the Late Miocene in the Linxia Basin (Deng, 2001a) . It is valuable to recognize the age structure and habitat of the dominant Chilotherium wimani from the Upper Miocene in the Linxia Basin .

A NEW VIVERRAVD (MAMMALIA, CARNIVORA) FROM THE LATE EOCENE OF TIANYANG, GUANGM

HUANG XueShi, ZHENG JiaJian

2005, 43(03):  231-236. 

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The present paper deals with a new viverravid found from the Late Eocene Gongkang Formation of Guangxi Province. The new form is a specialized taxon and may be the latest one of the family .

BEAVER（RODENTIA，MAMMALIAL）FOSSILS FROM LONGDAN，GANSU，CHINA

WANG Banyue

2005, 43(03):  237-242. 

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In the autumn of 2m3 some beaver fossils were collected from Longdan，when the monograph on the Longdan Mammalian Fauna（Qiu et ., 2004）was under press · It is fint time to find beaver in Gansu Province．discovery not 0 y enlarged the list Of the I-ongdan Mammalian Fauna fmrn 31 to 32 taxa, further confirmed the ancientry of the Longdan Fauna, but also expanded the distribution area of the beavers to the Gansu Province also. In addition, the discovery threw some new light on the paleoenvironments of the Longdan area during the early Pleistocene.

SIGNIFICANCE OF THE DATING OF THE MAJUANGOU FOR UNDERSTANDING EURASIAN MAMMOTH EVOLUTION

Wei Guangbiao, Adrian M.Lister

2005, 43(03):  243-244. 

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