Table of Content

15 March 2005, Volume 43 Issue 01

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A NEW TRICONODONT (MAMMALIA) FROM THE EARLY CRETACEOUS YIXIAN FORMATION OF LIAONING, CHINA

Men Jin, Hu Yaoming, Wang Yuanqing, Li Chuankui

2005, 43(01):  1-10. 

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A new genus and species of gobiconodotid, Meemannodon lujiatunensis, from the basal member of the Early Cretaceous Yixian Formation at Lujiatun locality, Liaoning, northeast China is described. The new genus, Meemannodon, differs from other triconodonts but is similar to Gobiconodon in having enlarged i1 , lower incisors reduced to 2 , conical and pointed posterior incisors , canines and anterior premolariforms , premolariforms with a tall central cusp but no accessory cusp , and procumbent i～p1. It differs from Gobiconodon and its close relatives in having more procumbent lower incisors and canines, proportionally larger i1 and smaller i2, lack of diastema between p2 (the last premolariform) and m1, main cusps of molariforms inclined posteriorly , molariform length greater than height , cusp a relatively low compared to distinct cusps b and c, premolariforms reduced , and m1 significantly smaller than m2～m4. It is similar to Repenomamus but further differs from Gobiconodon in lacking the cingulid on lower molariforms.

A PORCUPINE ( RODENTIA , MAMMALIA) FROM LU F ENGPITHECUS SITE, L UFENG, YUNNA

Wang Banyue, Qi Guoqin

2005, 43(01):  11-23. 

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The porcupine fossils from the Lufengpithecus site in Lufeng, Yunnan , were collected in the period from 1975 to 1983. They were preliminarily identified as Hystrix sp. (Qiu et al. , 1985). Further study of these fossils indicates that they represent a new species of Hystrix. All the specimens were collected from Lufengpithecus site, IVPP Loc. 75033, at Shihuiba, Lufeng, Yunnan.

RESTUDIES IN SMINTHOIDES SCHLOSSER, A FOSSIL GENUS OF THREE2TOED JERBOA FROM CHINA

Li Qiang, Qiu Zhuding

2005, 43(01):  24-35. 

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Summary can be seen in PDF.

FOSSIL EQUIDS ( MAMMALS) FROM THE TUOZIDONG, NANJING ( CHINA) AND ITS SIGNIFICANCE

Dong Wei, Fang Yingsan

2005, 43(01):  36-48. 

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After the discovery of Homo erectus and associated mammalian fauna from the Huludong Cave at Tangshan , Nanjing , Jiangsu Province (Mu et al. , 1993 ; Huang , 1996 ; Dong , 1999) , a new mammalian fauna was discovered in 2000 from the cave deposits at Tuozidong (32°03′N , 119°01′E) of 800 meters west of the Huludong. The relationship of these two faunas arose the interests of paleontologists. The recent study of the equids from Tuozidong shows that they are very significant and they are described below.

LATE EOCENE EARLY OLIGOCENELITHOLOGICAL AND BIOLOGICAL STRATIGRAPHY IN THE BURQIN REGIONOF XINJIANG

Yejie, Mengjin, Wu Wenyu, Ni Xijun

2005, 43(01):  49-60. 

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The Burqin Basin is in the northern area of Xinjiang Uygur Autonomous Region (Fig. 1). Terrestrial beds of Tertiary are exposed along the banks of the Irtysh River that runs through the region. Most of these Tertiary beds were previously considered to be the“Ulunguhe”Formation , a rock unit that was nominated at site Sa’erduoyila south of Village Halamagai in the Ulungur River Region and have been shown to include sediments of different lithologies and different ages, ranging from late Cretaceous to Oligocene (Wu, 1973; Peng, 1975; Peng and Wu, 1983; Tong et al., 1990; Wei and Tong, 1992; Bureau of Geology and Mineral Resources of Xinjiang Uygur Autonomous Region, 1993; Ye et al. , 2000 , 2001a ,b , 2002 , 2003a ,b ;Wu et al. , 2000 ; Meng et al. , 2001a ,b ; Daxner H ck and Wu , 2003) . Our investigations during the last a few years reveal that these beds in Burqin Basin are lithologically different from but biostratigraphically correlative with the ErgilianShandgolian sediments in Mongolia and in Zaisan Basin of Kazakhstan. The continuous sequence may span over the EoceneOligocene boundary. Based on their lithological and biological contents, we propose to abandon application of the name“Ulunguhe”Formation to these sediments and to divide them into two new rock units , the Irtysh River and Keziletuogayi formations. The type section (KZ2002) is 20 km northwest to the Burqin City on the north bank of the Irtysh River, north to the Keziletuogayi village. The section measured at this locality starts at N47°50. 024′, E86°40. 729′(base) and ends at N47°50. 479′, E86°40. 912′(top) and is described below:

NEW MATERIAL OF EUGALEASPIDS FROM THE SILURIAN OF CHANGXING, ZHEJIANG, CHINA, WITH A DISCUSSION ON THE EUGALEASPID PHYLOGENY

Gai Zhikun, Zhu Min, Zhao WenJin

2005, 43(01):  61-75. 

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The first work on vertebrates from the Silurian Maoshan Formation of Changxing, northwestern Zhejiang was done by Pan (1986a) who described the galeaspid fish Sinogaleaspis zhejiangensis, as well as finspines of Sinacanthus. From the same locality and horizon, Wang (1991) described another two galeaspid species, Meishanaspis lehmani and Changxingaspis gui. Since 1998, the authors have organized three subsequent excursions to Changxing, and collected abundant Silurian fish remains, which are suggestive of the Sinogaleaspis-Xiushuiaspis Fauna, the fish fauna originally described from Xiushui, Jianxi Province (Pan and Wang, 1980). The present account describes the eugaleaspid remains, with a revision of previously described material, and discusses the phylogeny of the Eugaleaspiformes.

A NEW SPECIES OF SUNOSUCHUS FROM ZIGONG, SICHUAN, CHINA

Fu Qianming, MingShuying, Peng Guangzhao

2005, 43(01):  76-83. 

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A new mesoeucrocodylian, Sunosuchus shunanensis sp. nov., was described in this paper. Its specimen was collected from the Lower Shaximiao Formation in the famous Dashanpu Dinosaur Quarry, Zigong, Sichuan, China in 1983. This new species resembles the others of Sunosuchus in having a narrow snout, a small cranial table, a ridge along the midline of the frontal, a pair of anterior palatal fenestrae located well anterior to the suborbital fenestrae, and a strongly developed crest B on the ventral surface of the quadrate. However, it can be distinguished from all other species of Sunosuchus on the basis of the following characters: a relatively narrow and elongate snout that attains a length 3 times that of the postorbital region, a pair of well developed maxillary depressions that occupy the posterior half of the maxilla, a relatively short but wide cranial table that attains a length2width ratio of 0. 65, the interfenestral region wider than the interorbital region, the lacrimal with a flange along the anterior border of the orbit, a pair of small, split2shaped infratemporal fenestrae, the squamosal lacking the thickened or grooved lateral side, a flange along the lateral margin of the basioccipital and medioventral margin of the exoccipital. In addition, this species differs from S. junggarensis in lacking a ridge a like structure and depression or fossa on the dorsal surface of the distal portion of the quadrate body, having a deep step between the main body of the pterygoid and its palatal process, and the palatine with a narrow anterior part and a broad posterior part. It differs from S. miaoi in that the frontal enters the supratemporal fenestra. It differs from S. junggarensis and S. shartegensis in lacking two or three rows of enlarged pits on the posterior dorsal surface of the frontal.