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DOI	10.1038/s41559-021-01458-4
	Acanthodian dental development and the origin of gnathostome dentitions
	Rücklin M.; King B.; Cunningham J.A.; Johanson Z.; Marone F.; Donoghue P.C.J.
发表日期	2021
ISSN	2397-334X
起始页码	919
结束页码	926
卷号	5 期号:7
英文摘要	Chondrichthyan dentitions are conventionally interpreted to reflect the ancestral gnathostome condition but interpretations of osteichthyan dental evolution in this light have proved unsuccessful, perhaps because chondrichthyan dentitions are equally specialized, or else evolved independently. Ischnacanthid acanthodians are stem-Chondrichthyes; as phylogenetic intermediates of osteichthyans and crown-chondrichthyans, the nature of their enigmatic dentition may inform homology and the ancestral gnathostome condition. Here we show that ischnacanthid marginal dentitions were statodont, composed of multicuspidate teeth added in distally diverging rows and through proximal superpositional replacement, while their symphyseal tooth whorls are comparable to chondrichthyan and osteichthyan counterparts. Ancestral state estimation indicates the presence of oral tubercles on the jaws of the gnathostome crown-ancestor; tooth whorls or tooth rows evolved independently in placoderms, osteichthyans, ischnacanthids, other acanthodians and crown-chondrichthyans. Crown-chondrichthyan dentitions are derived relative to the gnathostome crown-ancestor, which possessed a simple dentition and lacked a permanent dental lamina, which evolved independently in Chondrichthyes and Osteichthyes. ? 2021, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	anatomy and histology; animal; dentition; fossil; jaw; phylogeny; vertebrate; Animals; Dentition; Fossils; Jaw; Phylogeny; Vertebrates
来源期刊	Nature Ecology & Evolution
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/256925
作者单位	Naturalis Biodiversity Center, Leiden, Netherlands; School of Earth Sciences, University of Bristol, Life Sciences Building, Bristol, United Kingdom; Department of Linguistic and Cultural Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany; Department of Earth Sciences, Natural History Museum, London, United Kingdom; Swiss Light Source, Paul Scherrer Institut, Villigen, Switzerland
推荐引用方式 GB/T 7714	Rücklin M.,King B.,Cunningham J.A.,et al. Acanthodian dental development and the origin of gnathostome dentitions[J],2021,5(7).
APA	Rücklin M.,King B.,Cunningham J.A.,Johanson Z.,Marone F.,&Donoghue P.C.J..(2021).Acanthodian dental development and the origin of gnathostome dentitions.Nature Ecology & Evolution,5(7).
MLA	Rücklin M.,et al."Acanthodian dental development and the origin of gnathostome dentitions".Nature Ecology & Evolution 5.7(2021).