Recently ,in Jingangshan bed of Yixian F.at Jingangshan,Yixian county,Liaoning province ,a piece of well-preserved Lacertilia fossil material was discovered,It is identical in size and morphological features with Yabe...Recently ,in Jingangshan bed of Yixian F.at Jingangshan,Yixian county,Liaoning province ,a piece of well-preserved Lacertilia fossil material was discovered,It is identical in size and morphological features with Yabeinosaurus tenuis Endo et Shikama,1942 ,which the holotype specimen has lost for a long time.So It is suggested that the speciment discovered in Jingangshan is taken as a neotype of the species.展开更多
The medusae fossil from the metamorphic rock of Mukeng Formation of Shangxi Group in the east segment of the "Jiangnan Old Land" is an important evidence to time the age of the host strata and disintegrate t...The medusae fossil from the metamorphic rock of Mukeng Formation of Shangxi Group in the east segment of the "Jiangnan Old Land" is an important evidence to time the age of the host strata and disintegrate the host metamorphic stratigraphy. The medusae fossil is different from that of Edicara and Chengjiang fauna. Morphologically, it is similar to the Aurelia occurred in pelagic sea today, and it is termed as cf. Aurelia. It is possibly the later generation of the today′s Aurelia and must be generated in the time later than that of Chengjiang fauna. The occurrence of the cf. Aurelia indicates that the age of the host metamorphic rocks are probably in the range of Cambrian to Ordovician rather than that of Middle Proterozoic as previously suggested. Therefor, the metamorphic stratigraphy in the east segment of the "Jiangnan Old Land", at least the Mukeng Formation, was not the sediments of Proterozoic as previously regarded.展开更多
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(Archaeop...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.展开更多
文摘Recently ,in Jingangshan bed of Yixian F.at Jingangshan,Yixian county,Liaoning province ,a piece of well-preserved Lacertilia fossil material was discovered,It is identical in size and morphological features with Yabeinosaurus tenuis Endo et Shikama,1942 ,which the holotype specimen has lost for a long time.So It is suggested that the speciment discovered in Jingangshan is taken as a neotype of the species.
文摘The medusae fossil from the metamorphic rock of Mukeng Formation of Shangxi Group in the east segment of the "Jiangnan Old Land" is an important evidence to time the age of the host strata and disintegrate the host metamorphic stratigraphy. The medusae fossil is different from that of Edicara and Chengjiang fauna. Morphologically, it is similar to the Aurelia occurred in pelagic sea today, and it is termed as cf. Aurelia. It is possibly the later generation of the today′s Aurelia and must be generated in the time later than that of Chengjiang fauna. The occurrence of the cf. Aurelia indicates that the age of the host metamorphic rocks are probably in the range of Cambrian to Ordovician rather than that of Middle Proterozoic as previously suggested. Therefor, the metamorphic stratigraphy in the east segment of the "Jiangnan Old Land", at least the Mukeng Formation, was not the sediments of Proterozoic as previously regarded.
文摘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.
