论文部分内容阅读
简要报道了辽西热河群上部九佛堂组两件新的翼手龙类化石 ,即夜翼龙科(Nyctosauridae)的张氏朝阳翼龙 (新属、新种 )Chaoyangopteruszhangigen .etsp .nov.和古魔翼龙科 (Anhangueridae)的顾氏辽宁翼龙 (新属、新种 )Liaoningopterusguigen .et.sp .nov.。前者为保存较完整的化石骨架 ,后者为一大型翼龙的头骨和部分头后骨骼化石。朝阳翼龙是夜翼龙科在亚洲大陆的首次确切的化石记录 ,也是层位最低和保存最完整的化石骨架。朝阳翼龙具有4节翼指骨 ,手指爪粗大弯曲 ,这些发现补充和修正了前人认为的夜翼龙科只有 3节翼指骨 ,手指爪退化缺失等一些重要的形态学特征。朝阳翼龙与该科的Nyctosaurusgracilis头后骨骼相比 ,具有许多不同的特征 ,如胫骨特长 ,远长于股骨 ,翼掌骨和第 1翼指骨相对较短 ,肩胛骨短于乌喙骨等。辽宁翼龙是我国已发现的个体最大的翼龙化石 ,发育前上颌骨和齿骨弧形脊突这一古魔翼龙科的重要鉴别特征。与该科的其他成员相比 ,辽宁翼龙上、下颌的牙齿较少 ,仅分布在其前部 ,齿列约占上、下颌长度的 1 / 2。上颌第 1、3齿小 ,第 2、4齿巨大 ,其中第 4齿最大 ,为已知翼龙中最大的牙齿。牙齿具有明显的替换现象。夜翼龙科的成员仅分布于美洲大陆的晚白垩世地层中 ,而古魔翼龙科的成员则是
This paper briefly reports two new pterodactyl fossils, namely Chaoyangopteruszhangigen.etsp.nov. And Nyctosauridae, belonging to the Jiufotang Formation in the upper Rehe Group, western Liaoning Province. Liaoning, Liaoning, China (Old genus, new species) Liaoningopterusguigen .et.sp. Nov .. The former is to preserve a more complete fossil skeleton, the latter is a large pterosaur skull and part of the back bone fossils. Ascendant Pterodactyl is the first fossil record ever recorded on the Asian continent of the genus Tyrannosaur, and is also the lowest and best preserved fossil skeleton. Chaoyang pterosaurs have 4 wing phalanges and finger claws with large curvature. These findings supplement and correct some important morphological features such as the dedication of the phalaenopsis and the deformity of the finger claws, which were previously thought to be the nocturnal wing. The Chaetoptera differs from the Nyctosaurus gracilis head posterior skeleton of the family in that it has many distinct features such as tibial traits that are much longer than those of the femur, the metacarpal and first phalanges, and the scapula shorter than the black coracoids. Liaoning pterosaur is China’s largest individual has been found pterosaur fossil, the development of the maxillary and cusp arc-shaped spine, an ancient pterosaurs important identification characteristics. Compared with other members of the family, Liaoning pterosaurs, mandibular teeth less, only in the front of the distribution, dentition about mandibular length of 1/2. The first 1,3 teeth on the upper jaw, the first 2,4 teeth huge, of which the largest fourth teeth, known as the largest pterosaur teeth. Teeth have a significant replacement. Members of the genus Lycaceae are found only in the Late Cretaceous strata in the continental United States,