Marginal dentition and multiple dermal jawbones as the ancestral condition of jawed vertebrates

doi:10.1126/science.aaz9431

GSTDTAP > 气候变化

DOI	10.1126/science.aaz9431
	Marginal dentition and multiple dermal jawbones as the ancestral condition of jawed vertebrates
	Valéria Vaškaninová; Donglei Chen; Paul Tafforeau; Zerina Johanson; Boris Ekrt; Henning Blom; Per Erik Ahlberg
	2020-07-10
发表期刊	Science
出版年	2020
英文摘要	The first vertebrates were jawless, much like a modern hagfish. There has been a lot of interest in how these forms transitioned to having jaws like most of their descendants, including humans. Much of our understanding of this process has focused on how the teeth are replaced relative to the jaw. Previous theories suggested that tooth growth that occurred lingually—or from inside out as in modern fishes—was a derived condition. Vaškaninová et al. vertebrates, suggesting that it may have been ancestral. Science , this issue p. [211][1] The dentitions of extant fishes and land vertebrates vary in both pattern and type of tooth replacement. It has been argued that the common ancestral condition likely resembles the nonmarginal, radially arranged tooth files of arthrodires, an early group of armoured fishes. We used synchrotron microtomography to describe the fossil dentitions of so-called acanthothoracids, the most phylogenetically basal jawed vertebrates with teeth, belonging to the genera Radotina , Kosoraspis , and Tlamaspis (from the Early Devonian of the Czech Republic). Their dentitions differ fundamentally from those of arthrodires; they are marginal, carried by a cheekbone or a series of short dermal bones along the jaw edges, and teeth are added lingually as is the case in many chondrichthyans (cartilaginous fishes) and osteichthyans (bony fishes and tetrapods). We propose these characteristics as ancestral for all jawed vertebrates. [1]: /lookup/doi/10.1126/science.aaz9431
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/283406
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Valéria Vaškaninová,Donglei Chen,Paul Tafforeau,et al. Marginal dentition and multiple dermal jawbones as the ancestral condition of jawed vertebrates[J]. Science,2020.
APA	Valéria Vaškaninová.,Donglei Chen.,Paul Tafforeau.,Zerina Johanson.,Boris Ekrt.,...&Per Erik Ahlberg.(2020).Marginal dentition and multiple dermal jawbones as the ancestral condition of jawed vertebrates.Science.
MLA	Valéria Vaškaninová,et al."Marginal dentition and multiple dermal jawbones as the ancestral condition of jawed vertebrates".Science (2020).