Unique method of tooth replacement in durophagous placodont marine reptiles, with new data on the dentition of Chinese taxa
文献类型：期刊论文
| 作者 | Neenan, James M.1; Li, Chun2 ; Rieppel, Olivier3; Bernardini, Federico4; Tuniz, Claudio4; Muscio, Giuseppe5; Scheyer, Torsten M.1
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| 刊名 | JOURNAL OF ANATOMY
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| 出版日期 | 2014-05-01 |
| 卷号 | 224期号:5页码:603-613 |
| 关键词 | Triassic Marine Reptiles Placodontia Tooth Replacement Durophagy |
| 文献子类 | Article |
| 英文摘要 | The placodonts of the Triassic period (~252-201mya) represent one of the earliest and most extreme specialisations to a durophagous diet of any known reptile group. Exceptionally enlarged crushing tooth plates on the maxilla, dentary and palatine cooperated to form functional crushing areas in the buccal cavity. However, the extreme size of these teeth, combined with the unusual way they occluded, constrained how replacement occurred. Using an extensive micro-computed tomographic dataset of 11 specimens that span all geographic regions and placodont morphotypes, tooth replacement patterns were investigated. In addition, the previously undescribed dental morphologies and formulae of Chinese taxa are described for the first time and incorporated into the analysis. Placodonts have a unique tooth replacement pattern and results follow a phylogenetic trend. The plesiomorphic Placodus species show many replacement teeth at various stages of growth, with little or no discernible pattern. On the other hand, the more derived cyamodontoids tend to have fewer replacement teeth growing at any one time, replacing teeth unilaterally and/or in functional units, thus maintaining at least one functional crushing area at all times. The highly derived placochelyids have fewer teeth and, as a result, only have one or two replacement teeth in the upper jaw. This supports previous suggestions that these taxa had an alternative diet to other placodonts. Importantly, all specimens show at least one replacement tooth growing at the most posterior palatine tooth plates, indicating increased wear at this point and thus the most efficient functional crushing area. |
| WOS关键词 | ORNITHISCHIAN DINOSAURS ; CYAMODUS ; ARTICLE ; LIZARDS ; BIOLOGY |
| WOS研究方向 | Anatomy & Morphology |
| 语种 | 英语 |
| WOS记录号 | WOS:000333578700009 |
| 源URL | [http://124.16.247.212/handle/311034/7359]  |
| 专题 | 古脊椎动物与古人类研究所_图书馆1 |
| 作者单位 | 1.Univ Zurich, Palaeontol Inst & Museum, CH-8006 Zurich, Switzerland 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing, Peoples R China 3.Field Museum, Chicago, IL USA 4.Abdus Salam Int Ctr Theoret Phys, Trieste, Italy 5.Museo Friulano Storia Nat, Udine, Italy |
| 推荐引用方式 GB/T 7714 | Neenan, James M.,Li, Chun,Rieppel, Olivier,et al. Unique method of tooth replacement in durophagous placodont marine reptiles, with new data on the dentition of Chinese taxa[J]. JOURNAL OF ANATOMY,2014,224(5):603-613. |
| APA | Neenan, James M..,Li, Chun.,Rieppel, Olivier.,Bernardini, Federico.,Tuniz, Claudio.,...&Scheyer, Torsten M..(2014).Unique method of tooth replacement in durophagous placodont marine reptiles, with new data on the dentition of Chinese taxa.JOURNAL OF ANATOMY,224(5),603-613. |
| MLA | Neenan, James M.,et al."Unique method of tooth replacement in durophagous placodont marine reptiles, with new data on the dentition of Chinese taxa".JOURNAL OF ANATOMY 224.5(2014):603-613. |
入库方式： OAI收割
来源：古脊椎动物与古人类研究所
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