| New Material of Zhenyuanopterus (Pterosauria) from the Early Cretaceous Yixian Formation of Western Liaoning |
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| 作者姓名： | TENG Fangfang Lü Junchang WEI Xuefang HSIAO Yufu and Michael PITTMAN |
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| 作者单位： | 1 Xinghai Paleontological Museum of Dalian, Dalian 116000,Liaoning, China
2 Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China
3 Cores and Samples Center of Land and Resources, China Geological Survey, Sanhe 065201, Hebei, China
4 Geoscience Institute, Chinese Culture University, Taipei, Taiwan, 114, R.O.C, China
5 Vertebrate Palaeontology Laboratory, Department of Earth Sciences, the University of Hong Kong,Pokfulam, Hong Kong, China |
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| 基金项目： | This research was financially supported by grants from the Natural Science Foundation of China (41272022, 90914003) and the Basic Outlay of Scientific Research Work from the Ministry of Science and Technology (2011-SYS-02). |
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| 摘 要： | A new partial specimen of Zhenyuanopterus from the Lower Cretaceous Yixian Formation of Beipiao city, Liaoning Province is described. This specimen is slightly larger than half the size of the holotype. Although it is not complete, it provides new information on Zhenyuanopterus both in taxonomy and ontogeny： the total number of the caudal vertebrae is 15; the forelimb is more robust than the hindlimb; the growth rate of the humerus and femur is constant, and their ratio is about 1. Compared with the holotype, the scapula and coracoid grow faster than the humerus and the femur. The scapula and coracoid may slow their growth rate after a certain ontogenetic stage. The pectoral girdle, robust forelimb and weak hindlimb of the new material（XHPM1088） together with data from the holotype of Zhenyuanopterus indicate that this taxon spent less time on land than in the sky or other ecological niches such as forests and cliffs.
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| 关 键 词： | 早白垩世 新材料 义县组 辽西 飞龙 个体发育 发育阶段 肩胛骨 |
| 收稿时间： | 4/9/2013 12:00:00 AM |
| 修稿时间： | 2013/7/31 0:00:00 |
New Material of Zhenyuanopterus（Pterosauria） from the Early Cretaceous Yixian Formation of Western Liaoning |
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| Authors: | 《Acta Geologica Sinica》 |
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| Abstract: | A new partial specimen of Zhenyuanopterus from the Lower Cretaceous Yixian Formation of Beipiao city, Liaoning Province is described. This specimen is slightly larger than half the size of the holotype. Although it is not complete, it provides new information on Zhenyuanopterus both in taxonomy and ontogeny: the total number of the caudal vertebrae is 15; the forelimb is more robust than the hindlimb; the growth rate of the humerus and femur is constant, and their ratio is about 1. Compared with the holotype, the scapula and coracoid grow faster than the humerus and the femur. The scapula and coracoid may slow their growth rate after a certain ontogenetic stage. The pectoral girdle, robust forelimb and weak hindlimb of the new material(XHPM1088) together with data from the holotype of Zhenyuanopterus indicate that this taxon spent less time on land than in the sky or other ecological niches such as forests and cliffs. |
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| Keywords: | Boreopteridae Zhenyuanopterus ontogeny |
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