Table of Content

15 March 1994, Volume 32 Issue 01

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EARLY DEVONIAN FISHES FROM GUIJIATUN AND XUJIACHONG FORMATIONS OF QUJING, YUNNAN, AND RELATED BIOSTRATIGRAPHIC PROBLEMS

Zhu Min, Wang Junqing, Fan Junhang

1994, 32(01):  1-20. 

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Lower Devpnian stratigraphy of Qujing in eastern Yunnan is a non-marine strato-type in South China and can be subdivided into Xishancun, Xitun, Guijiatun and Xujiachong Formations in ascending order. This sequence is rich in fossils of early vertebrates, bivalves, ostracods and plants. With the early vertebrates, the aspects of Xishancun and Xitun Formations are fairly definite while those of Guijiatun and Xujiachong Formations are equivocal, restraining the establishment of complete early Devonian biostratigraphic succession. In the paper, the new discoveries of early vertebrates from Guijiatun and Xujiachong Formations have been described, i.e., galeaspid Gantarostraspis geni in Xujiachong Formation, and antiarchs Yunnanolepis chii, Procondylolepis quiingensis and crossopterygian Youngolepis sp. in Guijiatun Formation. With the new findings, the early vertebrate fauna of Lower Devonian in Qujing have been summarized. It is suggested that the early vertebrates in Early Devonian of China could be divided into four assemblages, in ascending order (Table 1), that (4) Kueichowlepis-Sinopetalichthys assemblage; (3) Sanchaspis-Asiaspis-Pterogonaspis assemblage; (2) Procondylolepis-Chuchinolepis assemblage; (1) Polybrachiaspis-Laxaspis assemblage. In Qujing area, the fourth assemblage is absent, implying the deficiency of the part or entire Emsian sediments. The correlation between Xujiachong Formation, Posongchong Formation, Nakaoling Formation has been analyzed, using the available early vertebrate data. It is also argued that Lianhuashan Stage could not be the first local chrono-stratigraphic unit in the Devonian of South China.

NEW DISCOVERY OF YUNNANOLEPIDS—HETEROYUNNANOLEPIS QUJINGENSIS (GEN. ET SP. NOV.)

Wang Zhongshan

1994, 32(01):  21-31. 

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The present paper deals with a new antiarch Heteroyunnanolepis quiingensis gen. et sp. nov., collected from the Lower Devonian of Cuifengshan, Qujing, Yunnan in 1990. Only external or internal molds are preserved and available for study, the new genus is attributed to Yunnanolepidae mainly in the light of general similarity to the previously described forms of the family, in particular, axial joint without brachial process, pattern of skull-roof.

ON THE MIDDLE DEVONIAN SERIES OF WUDING, YUNNAN

Liu Shi fan

1994, 32(01):  32-40. 

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The Middle Devonian of Wuding, Yunnan shows a continous sedimentary Series about 400m thick with the underlying Lower Devonian, and may be subdivided into three parts based on the fossils. The lower part consists of pale sandstone interbeded with black shale, yielding Wudinolepis and Arthrodira fossils. The middle part consists of yellow sandstone intercalated with mar lite yielding very abundant antiarchians, Bothriolepis, Dianolepis liui and Xichonolepis etc. The upper part consists chiefly of light brown sandstone yielding Xichonolepis as well as plant fossils and is overlaid by the Jurassic rocks. The Devonian fish fossils and stratigraphy of Wuding have been studied by many palaeontologists since 1942. Prof. H. C. Wang for the first time reported Bothriolepis fossils from Wuding. In 1965, Zhang Guorui described Wudinolepis weni, Dianolepis liui and Bothriolepis tungseni. The horizons of the fish-bearing strata were considered as Middle Devonian. In 1973, Liu Yuhai and Wang Junqing in "Some problems on the Devonian stratigraphy of eastern Yunnan" discussed the division of Devonian System of Wuding as shown in the table l. Zhao Xiukun's "The Devonian System of Wuding region" discussed again the division of Wuding Devonian System (Table 1) in 1978. Wang (1984) described some Arthrodira fossils from marl intercalated bed of black shale yielding Wudinolepis, and considered them as Eifelian in age. During recent excavations in Wuding region, a few new fish fossils have been discovered. Especially singnificantone is the discovery of a new antiarchian associated with Wudinolepis and other small antiarchians. Another new discovery is Wudinolepis found in Luquan. The fossils were preserved together with Arthrodira fragments as Wuding. It appears that Wudinolepis and other smell antiarchians should represent an assemblage of Eifelian. Bothriolepis—Dianolepis ligi represent a stable assemblage of early Givetian in China. Therefore the middle part including Bothriolepis—Dianolepis liui fauna is corresponding to the Haikou Formation of Kunming or Tiaomajian Formation of Hunan. The upper part yielding Xichonolepis and plant fossils should correspond with Qujing Formation, because the corresponding horizons near Wuding yield Stringocephalus and Emanuella etc. Based on the fact mentioned above, the upper, middle and lower parts should be represented by the Sujiapo, Haikou and Jiucheng Formations respectively. A new proposition about the division of the Devonian System of Wuding region has been made and shown in table 1.

A REVIEW OF MESOZOIC OSTEOGLOSSOMORPH FISH LYCOPTERA LONGICEPHALUS

Zhang Jiangyong, Jin Fan, Zhou Zhonghe

1994, 32(01):  41-59. 

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In the present paper the anatomical characters and morphological variation of Lycoptera longicephalus found from western liaoning are reviewed. Lycoptera longicephalus Liu et al. 1963 is emended to Jinanichthys longicephalus (Liu et al.). Liaoxiichthys Su 1992 is considered as a synonym of Jinanichthys. The evolutionary trend and systematic position of Jinanichthys are discussed.

A NEW PALEOCENE BIRD FROM ANHUI, CHINA

Hou Lianhai

1994, 32(01):  60-65. 

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In 1991, a fossil brid represented by three bones of the same individual was obtained by Prof. Li Chuankui from Qianshan District, Anhui Province. This discovery documents the first record of Rallidae from the Paleocene of China. Described below, the newly discovered specimen repersents a new genus and species.

NOTE ON A FOSSIL CUORA (TESTUDINES) FROM TONGSHAN, ANHUI

Ye Xiangkui

1994, 32(01):  66-68. 

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Two pieces of fossil turtle from Tongshan, Anhui Province, probably of Late Pliocene, w ere sent to the present author for determination by the Anhui Provincial Museum. In view of the absence of bony bridge, the hexagonal neural plates with short-sided behind, and the hinged hyoplastra and hypoplastra of plastron, the fossils were recognized as a member of Cuora, a living genus of Emydidae distributed in East and Southeast Asia, chiefly in China. So far as it is known, no Pliocene fossil record of this genus has been reported.

FIRST DISCOVERY OF EOCENE TITANOTHERE IN XINJIANG, CHINA

QI Tao

1994, 32(01):  69-70. 

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A NOMEN NOVUM FOR TANICHTHYS JIN, 1991

JIN Fan

1994, 32(01):  70-70. 

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