气候变化领域集成服务门户(CCPortal): The feeding system of Tiktaalik roseae: an intermediate between suction feeding and biting

CCPortal

DOI	10.1073/pnas.2016421118
	The feeding system of Tiktaalik roseae: an intermediate between suction feeding and biting
	Lemberg J.B.; Daeschler E.B.; Shubin N.H.
发表日期	2021
ISSN	00278424
卷号	118 期号:7
英文摘要	Changes to feeding structures are a fundamental component of the vertebrate transition from water to land. Classically, this event has been characterized as a shift from an aquatic, suction-based mode of prey capture involving cranial kinesis to a biting-based feeding system utilizing a rigid skull capable of capturing prey on land. Here we show that a key intermediate, Tiktaalik roseae, was capable of cranial kinesis despite significant restructuring of the skull to facilitate biting and snapping. Lateral sliding joints between the cheek and dermal skull roof, as well as independent mobility between the hyomandibula and palatoquadrate, enable the suspensorium of T. roseae to expand laterally in a manner similar to modern alligator gars and polypterids. This movement can expand the spiracular and opercular cavities during feeding and respiration, which would direct fluid through the feeding apparatus. Detailed analysis of the sutural morphology of T. roseae suggests that the ability to laterally expand the cheek and palate was maintained during the fish-to-tetrapod transition, implying that limited cranial kinesis was plesiomorphic to the earliest limbed vertebrates. Furthermore, recent kinematic studies of feeding in gars demonstrate that prey capture with lateral snapping can synergistically combine both biting and suction, rather than trading off one for the other. A “gar-like” stage in early tetrapod evolution might have been an important intermediate step in the evolution of terrestrial feeding systems by maintaining suction-generation capabilities while simultaneously elaborating a mechanism for biting-based prey capture. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Cranial kinesis \| feeding \| tetrapodomorph \| water-to-land transition
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180657
作者单位	Department of Organismal Biology and Anatomy, University of Chicago, Chicago, IL 60637, United States; Department of Vertebrate Zoology, Academy ofNatural Sciences of Drexel University, Philadelphia, PA 19103, United States
推荐引用方式 GB/T 7714	Lemberg J.B.,Daeschler E.B.,Shubin N.H.. The feeding system of Tiktaalik roseae: an intermediate between suction feeding and biting[J],2021,118(7).
APA	Lemberg J.B.,Daeschler E.B.,&Shubin N.H..(2021).The feeding system of Tiktaalik roseae: an intermediate between suction feeding and biting.Proceedings of the National Academy of Sciences of the United States of America,118(7).
MLA	Lemberg J.B.,et al."The feeding system of Tiktaalik roseae: an intermediate between suction feeding and biting".Proceedings of the National Academy of Sciences of the United States of America 118.7(2021).