黑龙江密山—宝清早泥盆世盾皮鱼类化石  

THE DISCOVERY OF EARLY DEVONIAN PLACODERMS FROMBAOQING AND MISHAN COUNTIES OF HEILONGJIANG PROVINCE

作　　者：王俊卿[1] 王士涛[2] 

机构地区：[1]中国科学院古脊椎动物与古人类研究所,北京100044 [2]中国地质科学院地质研究所,北京100037

出　　处：《古脊椎动物学报》2002年第2期161-164,共4页Vertebrata Palasiatica

基　　金：国家重点基础研究发展规划项目(编号:G200077704)资助

摘　　要：1993年,原地矿部沈阳地质矿产研究所苏养正先生将其在黑龙江省东北部密山及宝清下黑台组中采到的5件泥盆纪鱼化石送交王士涛鉴定.经过修理和观察后认为,这些骨片属于盾皮鱼类(Placoderms).这是迄今为止在东北地槽区内首次发现的泥盆纪鱼类化石,具有重要的生物地层学及古动物地理学意义.In 1993, Mr. Su Yangzheng sent Wang Shitao some fish fossils collected from the uppermost part of the Lower Heitai Formation of Early Devonian in Mishan and Baoqing counties, Eastern Heilongjiang Province, Northeastern China.The four plates were collected from Baoqing County. The internal mould of the plate A might be the anterior dorso-lateral plate, the exact place of plate B is not clear, and there are no depressions of overlapped area shown on the internal moulds between A and B (Fig.1,1). The specimen of plate C is an incomplete plate, the ornamentation is presented by the irregular and round tubercles on it (Fig. 1,2), it may be the extralateral plate. The ornamentation of plate D is shown by the tubercles and worm-form and the short ridge from the mid-plate to the posterior margin (Fig .1,3), it may be the mixilateral plate. The specimen plate E of Mishan County may be an external mould of the posterior ventro-lateral plate. The anterior margin is pointing anteriorly and the overlapped area is obvious, the posterior margin is straight, and the lateral ridge is very clear (Fig. 1,4).All these plates should be referred to the Placodermi, and may belong to different forms of ? Antiarcha.Hou and Boucot (1990) has presented the Balkhash-Mongolia-Okhotsk Region of the Old World Realm in the Devonian, and the Mishan-Baoqing area should be referred to the region. But the fish fossils in Mishan-Baoqing area cannot be compared with the fish fossils of Kazakhstan and South China, particularly since the specimens are incomplete plates.

关 键 词：黑龙江密山--宝清 早泥盆世 盾皮鱼类化石 

分 类 号：Q915.862[天文地球—古生物学与地层学]