辽宁北票首次发现初鸟类化石-东方吉祥鸟  

A New Avialian Bird - Jixiangornis orientalis gen. et sp. nov. - from the Lower Cretaceous of Western Liaoning, NE China

作　　者：季强[1] 季鑫鑫[1] 尤海鲁[2] 姬书安[3] 张鸿斌 张建平[5] 袁崇喜[5] 王丽霞[6] 

机构地区：[1]南京大学地球科学系,南京210093 [2]中国地质科学院地质研究所,北京100037 [3]北京大学地球与空间科学学院,北京100871 [4]常州中华恐龙园,江苏常州213022 [5]中国地质大学(北京)地球科学与资源学院,北京100083 [6]辽宁省国土资源厅化石管理处,沈阳110032

出　　处：《南京大学学报（自然科学版）》2002年第6期723-736,共14页Journal of Nanjing University（Natural Science）

基　　金：国土资源部"十.五"专项项目"辽西中生代热河生物群综合研究"

摘　　要：本文记述了辽宁北票义县组一件新的初鸟类(Avialae)化石,这是继中华神州鸟(Shenzhouraptor sinensis Ji et al,2002)之后初鸟类化石的又一发现.它以上下颌无齿而具角质喙、胸骨发达且具龙骨突、前肢显著长于后肢等特征与始祖鸟(Archaeopteryx)不同,以后肢第Ⅰ趾爪已反转而与其它3趾对握等特征与神州鸟相区别,该化石被命名为东方吉祥鸟(新属、新种)(Jixiangornis orientalisgen.et sp.nov.)中国辽西新近发现的中华神州鸟和东方吉祥鸟(新属、新种)目前是世界上最古老最原始真正具有角质喙和飞行能力的原始鸟类.A well-preserved specimen of an avialian bird with a complete skull and postcranial bones was found from the lower part of the Yixian Formation (Early Cretaceous) in Sihetun area of Beipiao City, western Liaoning, NE China. It is characterized by the development of a beak, the large sternum with a weak keel, the typical U-shaped furcula, the forelimbs much longer than the hindlimbs (about 131:100) and the long tail with about 27 caudal vertebrae. Due to the characters mentioned above, the new avialian bird is surely considered to be capable of flight stronger than Shenzhouraptor and Archaeopteryx. It is described in detail and named asJixiangornis orientalis gen. et sp. nov. in this paper

关 键 词：鸟类化石 东方吉祥鸟 辽宁北票 早白垩世 义县组 初鸟类 鸟类起源 

分 类 号：Q915.865[天文地球—古生物学与地层学]