New Specimens of Yanornis Indicate a Piscivorous Diet and Modern Alimentary Canal
文献类型：期刊论文
| 作者 | Zheng, Xiaoting1,2; O'Connor, Jingmai K.3; Huchzermeyer, Fritz4; Wang, Xiaoli1; Wang, Yan1; Zhang, Xiaomei2; Zhou, Zhonghe3
|
| 刊名 | PLOS ONE
 |
| 出版日期 | 2014-04-14 |
| 卷号 | 9期号:4 |
| 文献子类 | Article |
| 英文摘要 | A crop adapted for an herbivorous diet of seeds has previously been documented in the Early Cretaceous birds Sapeornis and Hongshanornis. Here we report on several specimens of Yanornis that preserve a crop containing fish. One specimen preserves two whole fish in the oesophagus, indicating that Early Cretaceous birds shared trophic specializations with Neornithes for the increased energetic demands of flight - namely the storing of food for later consumption when the stomach is full. Whole fish also indicate that despite their presence, teeth were not used to orally process food, suggesting the hypertrophied dentition in this taxon were utilized in prey capture. The presence of macerated fish bones in the crop of other specimens indicates the highly efficient advanced muscular system of peristalsis responsible for moving ingested items between different segments of the alimentary canal was also in place. Despite the fact many features of the modern avian alimentary canal are inferred to compensate for the absence of teeth in birds (expandable oesophagus, grinding gizzard), the derived alimentary canal was apparently present in toothed Cretaceous birds. Although Yanornis was considered to have switched their diet from piscivorous to herbivorous, based on position and morphology we reinterpret the gastroliths reported in one specimen as sand impacted in the intestines, and reconstruct the taxon as primarily piscivorous. This is a novel interpretation for fossilized gastroliths, and the first documentation of this condition in the fossil record. |
| WOS关键词 | CHINA ; BIRD ; AVES |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000336970400147 |
| 源URL | [http://124.16.247.212/handle/311034/7357]  |
| 专题 | 古脊椎动物与古人类研究所_图书馆1 古脊椎动物与古人类研究所_古低等脊椎动物研究室 |
| 作者单位 | 1.Linyi Univ, Inst Geol & Paleontol, Linyi, Shandong, Peoples R China 2.Tianyu Nat Hist Museum Shandong, Pingyi, Shandong, Peoples R China 3.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origin, Beijing, Peoples R China 4.Univ Pretoria, Fac Vet Sci, Dept Paraclin Sci, ZA-0110 Onderstepoort, South Africa |
| 推荐引用方式 GB/T 7714 | Zheng, Xiaoting,O'Connor, Jingmai K.,Huchzermeyer, Fritz,et al. New Specimens of Yanornis Indicate a Piscivorous Diet and Modern Alimentary Canal[J]. PLOS ONE,2014,9(4). |
| APA | Zheng, Xiaoting.,O'Connor, Jingmai K..,Huchzermeyer, Fritz.,Wang, Xiaoli.,Wang, Yan.,...&Zhou, Zhonghe.(2014).New Specimens of Yanornis Indicate a Piscivorous Diet and Modern Alimentary Canal.PLOS ONE,9(4). |
| MLA | Zheng, Xiaoting,et al."New Specimens of Yanornis Indicate a Piscivorous Diet and Modern Alimentary Canal".PLOS ONE 9.4(2014). |
入库方式： OAI收割
来源：古脊椎动物与古人类研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。