Scales and Dermal Skeletal Histology of an Early Bony Fish Psarolepis romeri and Their Bearing on the Evolution of Rhombic Scales and Hard Tissues
文献类型：期刊论文
| 作者 | Qu, Qingming1,2; Zhu, Min2; Wang, Wei2 |
| 刊名 | PLOS ONE
 |
| 出版日期 | 2013-04-09 |
| 卷号 | 8期号:4 |
| 文献子类 | Article |
| 英文摘要 | Recent discoveries of early bony fishes from the Silurian and earliest Devonian of South China (e. g. Psarolepis, Achoania, Meemannia, Styloichthys and Guiyu) have been crucial in understanding the origin and early diversification of the osteichthyans (bony fishes and tetrapods). All these early fishes, except Guiyu, have their dermal skeletal surface punctured by relatively large pore openings. However, among these early fishes little is known about scale morphology and dermal skeletal histology. Here we report new data about the scales and dermal skeletal histology of Psarolepis romeri, a taxon with important implications for studying the phylogeny of early gnathostomes and early osteichthyans. Seven subtypes of rhombic scales with similar histological composition and surface sculpture are referred to Psarolepis romeri. They are generally thick and show a faint antero-dorsal process and a broad peg-and-socket structure. In contrast to previously reported rhombic scales of osteichthyans, these scales bear a neck between crown and base as in acanthodian scales. Histologically, the crown is composed of several generations of odontodes and an irregular canal system connecting cylindrical pore cavities. Younger odontodes are deposited on older ones both superpositionally and areally. The bony tissues forming the keel of the scale are shown to be lamellar bone with plywood-like structure, whereas the other parts of the base are composed of pseudo-lamellar bone with parallel collagen fibers. The unique tissue combination in the keel (i.e., extrinsic Sharpey's fibers orthogonal to the intrinsic orthogonal sets of collagen fibers) has rarely been reported in the keel of other rhombic scales. The new data provide insights into the early evolution of rhombic (ganoid and cosmoid) scales in osteichthyans, and add to our knowledge of hard tissues of early vertebrates. |
| WOS关键词 | LOWER-VERTEBRATES ; ORIGIN ; FOSSIL ; INTERRELATIONSHIPS ; OSTEICHTHYANS ; POROLEPIFORM ; CHARACTERS ; PHYLOGENY ; ANATOMY ; COSMINE |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000317909600117 |
| 源URL | [http://124.16.247.212/handle/311034/7332]  |
| 专题 | 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.Uppsala Univ, Evolutionary Biol Ctr, Dept Organismal Biol, Subdept Evolut & Dev, Uppsala, Sweden 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Evolutionary Systemat Vertebrates, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qu, Qingming,Zhu, Min,Wang, Wei. Scales and Dermal Skeletal Histology of an Early Bony Fish Psarolepis romeri and Their Bearing on the Evolution of Rhombic Scales and Hard Tissues[J]. PLOS ONE,2013,8(4). |
| APA | Qu, Qingming,Zhu, Min,&Wang, Wei.(2013).Scales and Dermal Skeletal Histology of an Early Bony Fish Psarolepis romeri and Their Bearing on the Evolution of Rhombic Scales and Hard Tissues.PLOS ONE,8(4). |
| MLA | Qu, Qingming,et al."Scales and Dermal Skeletal Histology of an Early Bony Fish Psarolepis romeri and Their Bearing on the Evolution of Rhombic Scales and Hard Tissues".PLOS ONE 8.4(2013). |
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。