Table of Content

15 September 2003, Volume 41 Issue 03

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A REVISION OF THE PERLEIDID FISHES FROM THE LOWER YANGTZE REGION OF SOUTH CHINA—Second Report on the Fish Sequence Study Near the Permian-Triassic Boundary in South China

JIN Fan, WANG NianZhong, CAI ZhengQuan

2003, 41(03):  169-184. 

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The perleidid fishes in China were first discovered from Shaanxi in North China (Chou and Liu, 1957). However, all the other known fossils were found from the Middle and Lower Yangtze region in South China (Fig. 1). Up to now, 3 genera and 7 species have been recognized and nominated from those discovered in the Yangtze region (Su ,1981; Su and Li ,1983; Qian et al., 1997; Liu et al., 2002). Among the known perleidid fishes in South China, most forms are improperly recognized or nominated based on only single incomplete and not well-prepared specimen, and some are evidently synonymous. The fishes from the Lower Yangtze region (2 genera and 6 species) are reexamined in the present paper, of which only Perleidus jiangsuensis and P. yangtzensis are valid to comply with the code of zoological nomenclature (Ride et al., 1985), and Perleidus aff. P. madagascariensis is probably not a perleidid.

A NEW SPECIES OF SINOL EPIDOTUS FROM LATE MESOZOIC OF SOU-THERN JIANGSU, WITH COMMENTS ON THE GENUS SINOL EPIDOTUS

SU DeZao

2003, 41(03):  185-194. 

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The fossil holostean described here was collected from Jurong County, Southern Jiangsu Province, and referred to a new species, Sinolepidotus longidorsalis, of the genus Sinolepidotus. This new species resembles Sinolepidotus chekiangensis in its body form, elongated dorsal fin, small mouth, deep coronoid process of the mandible, and deep scales in the middle portion of the flank and dorsal region of the body. However, it is characterized by longer dorsal fin, large number of rays of dorsal fin, acute snout, lack of pectinations of scales, and thus is distinguished from Sinolepidotus chekiangensis. The genus Sinolepidotus is reviewed and its systematic position within the Order Semionotiformes is uncertain. According to the nature of Sinolepidotus and invertebrate fossils, the age of the fish-bearing beds is considered as Early Cretaceous.

A NEW MANIRAPTORAN DINOSAUR FROM THE EARLY CRETACEOUS YIXIAN FORMATION OF WESTERN LIAONING

XU Xing, WANG XiaoLin

2003, 41(03):  195-202. 

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A specimen collected from the Early Cretaceous Yixian Formation, Jehol Group of Liaoning, China, represents a new genus and species of maniraptoran theropod. It comprises almost complete articulated pectoral girdles, forelimbs and some ribs and is here named Yixianosaurus longimanus gen. et sp. nov. Diagnostic features of the new species include manus 140 % as long as humerus, manual phalanx Ⅱ-2 longer than metacarpal Ⅱ, manual phalanx Ⅲ-3 244 % as long as phalanx Ⅲ-1, and manual phalanx Ⅲ-2 bearing a proximoventral heel. With the integuments preserved on the holotype specimen, Y. longimanus represents the ninth feathered dinosaur species reported from western Liaoning. The elongated penultimate phalanges of Y. longimanus indicate an improved grasping capability and might represent an adaptation to the arboreal habit. The discovery of Y. longimanus increases the diversity of theropod dinosaurs in the Jehol Fauna.

NEW MATERIALS OF SIANODON FROM SHAANXI, CHINA

Li Qian

2003, 41(03):  203-210. 

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Summary can be seen in PDF.

OLIGOCENE RODENTS FROM THE NOMOGEN (= NOM KHONG) AREA OF NEI MONGOL, CHINA, AND COMMENTS ON RELATED STRATIGRAPHY

WANG BanYue

2003, 41(03):  211-219. 

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The Baron Sog Formation, one of the classic Paleogene formations in Asia, was established by the Central Asiatic Expedition of the American Museum of Natural History (AMNH) in 1925 based on beds at the top of the Baron Sog Mesa. The Baron Sog Formation was also applied to some tope beds of other mesas, such as East Mesa, Erden Obo (= Urtyn Obo) and Nom Khong Obo (= Nom Khong Shireh or Holy Mesa) of the Nomogen (= Nom Khong or Naomugen) area in the Erlian Basin, Nei Mongol, China (Osborn ,1929; Berkey et al. ,1929). However, the wide application of this formation to so vast an area has never been seriously tested. While visiting the AMNH in May and June, 2001, invited by Dr. D. R. Tedford of AMNH, the author was able to observe the specimens collected by the Central Asiatic Expedition and read the related parts of the AMNH archives. Having studied and checked the specimens against the original archives, the author proposes that the age and name of the top bed at the Nom Khong Obo are to be corrected. In this paper, some rodent specimens from the top bed on the Nom Khong Obo are described and the age of the Baron Sog Formation is discussed. All the specimens described here were collected by the Central Asiatic Expedition in 1928. The terminology of the cheek teeth and the direction of the measurements follow Wang (2001).

DISCOVERY OF PARACERATHERIUM IN THE NORTHERN JUNGGAR BASIN OF XINJIANG

YE Jie, MENG Jin, WU WenYu

2003, 41(03):  220-229. 

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Paraceraterium sui sp. nov. is represented by a lower jaw collected at Loc. 20004 (46°35. 779′N, 87°43. 818′E) of Saerduoyila, Halamagai Village, Fuhai County, Xinjiang Uygur Autonomous Region. The new species is similar to the type species of the genus, P. bugtiense, in general morphology of the mandible and teeth, but differs from the latter in larger size, the proportionally deeper horizontal ramus, the more anteroventrally curved symphysis and the much deeper trenched dorsal surface of symphysis. The associated small mammals indicates an age of Late Oligocene. The occurrence of Paraceratherium sui demonstrates that the genus Paraceratherium erected by Forster-Cooper, based on the lower jaw from Pakistan, is a valid taxon different from Indricotherium.

A NEW SPECIES OF SHAANXISPIRA (BOVIDAE, ARTIODACTYLA, MAMMALIA) FROM THE BAHE FORMATION, LANTIAN, CHINA

ZHANG ZhaoQun

2003, 41(03):  230-239. 

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A new species of large bovid Shaanxispira, S. baheensis is briefly described. The materials were found from the middle part of the Bahe Formation, Lantian County, China. S. baheensis is characterized by having straight horn cores with a clockwise twisted keel on the right, positioned behind the orbit. The braincase is rather short in respect to the width, and the cranial axis is at about 90°with the facial axis. The occipital surface is wide and flat with a wide mastoid exposure. No basal pillars on the labial side of lower and on the lingual side of upper molars. The phylogenetic relationships of the Shaanxispira with some other large bovids are also tentatively discussed. There possibly existed a group of large bovid of tribal or subfamilial level that died out during the late Miocene, which includes the Urmiatherium, Plesiaddax, Hezhengia, Shaanxispira, and possibly Sinotragus.

A NEW GENUS OF PLIOHYRACINAE (HYRACOIDEA, MAMMALIA) FROM THE LATE PLIOCENE OF DEGE, SICHUAN, CHINA

CHEN GuanFang

2003, 41(03):  240-248. 

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Summary can be seen in PDF.