New Specimens of Yanornis Indicate a Piscivorous Diet and Modern Alimentary Canal

IVPP-IR > 中科院古脊椎所（2000年以后）

	New Specimens of Yanornis Indicate a Piscivorous Diet and Modern Alimentary Canal
	Zheng, Xiaoting 1,2; O'Connor, Jingmai K.3; Huchzermeyer, Fritz 4; Wang, Xiaoli 1; Wang, Yan 1; Zhang, Xiaomei 2; Zhou, Zhonghe3
	2014-04-14
发表期刊	PLOS ONE
卷号	9 期号:4
文章类型	Article
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标题词	Science & Technology
关键词[WOS]	CHINA ; BIRD ; AVES
收录类别	SCI
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000336970400147
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/7357
专题	中科院古脊椎所（2000年以后）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).

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