Chitinozoans with "skirt": Ultrastructure and palaeoecological implications of carina in Cyathochitina Eisenack, 1955

doi:10.1016/j.palaeo.2021.110348

	Chitinozoans with "skirt": Ultrastructure and palaeoecological implications of carina in Cyathochitina Eisenack, 1955
	Wang, Wenhui 1; Liang, Yan 2; Lyu, Qiao 1; Hints, Olle 3; Chen, Shefa 1; Nolvak, Jaak 3
刊名	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
	2021-05-15
卷号	570 页码:16
关键词	Ordovician Microfossil Functional morphology Palaeogeography CFD analysis CHITDB
ISSN号	0031-0182
DOI	10.1016/j.palaeo.2021.110348
通讯作者	Wang, Wenhui(whwang@csu.edu.cn)
英文摘要	Carina, a sharp extension of the basal margin in some chitinozoans recalling a "skirt", is a primary character used for classifying chitinozoans at the genus level. However, little is known about this structure. In this study, we present new observations on the carina ultrastructure in the chitinozoan genus Cyathochitina that was investigated by using novel imaging techniques on three-dimensional specimens collected mainly from eastern Baltoscandia. The results show that the carina is loosely filled by sponge-like fibers with chemical compositions similar to those of the main vesicle layers. Cyathochitina is the dominant genus responsible for the taxonomic diversity of carina-bearing species, and it reached a diversity peak in the late Darriwilian. Palaeogeographically, the occurrences of Cyathochitina in the eastern Baltic region are reconstructed on the basis of data collected from 24 drillcores, suggesting links with sea-level fluctuations. The presence and morphology of the carina is interpreted as an adaptive life strategy with two benefits. First, the carina strengthened the basal firmness and reduced the weight of the chitinozoan vesicle by filling it with spongy fibrils. Second, computational fluid dynamics (CFD) analysis suggests that the formation of the carina might have improved the hydrodynamic properties and floating ability of the vesicle by dispersal in different hydrodynamic regimes.
资助项目	National Natural Science Foundation of China[41772001] ; National Natural Science Foundation of China[41972015] ; Strategic Priority Research Program of Chinese Academy of Sciences[196 (XDB26000000)] ; Estonian Research Council[PRG836] ; IGCP project[653]
WOS研究方向	Physical Geography ; Geology ; Paleontology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000639124500007
资助机构	National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Estonian Research Council ; IGCP project
内容类型	期刊论文
源URL	[http://ir.nigpas.ac.cn/handle/332004/38057]
专题	中国科学院南京地质古生物研究所
通讯作者	Wang, Wenhui
作者单位	1.Cent South Univ, Sch Geosci & Infophys, Key Lab Metallogen Predict Nonferrous Met & Geol, Minist Educ, Changsha 410083, Peoples R China 2.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China 3.Tallinn Univ Technol, Dept Geol, EE-19086 Tallinn, Estonia
推荐引用方式 GB/T 7714	Wang, Wenhui,Liang, Yan,Lyu, Qiao,et al. Chitinozoans with "skirt": Ultrastructure and palaeoecological implications of carina in Cyathochitina Eisenack, 1955[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2021,570:16.
APA	Wang, Wenhui,Liang, Yan,Lyu, Qiao,Hints, Olle,Chen, Shefa,&Nolvak, Jaak.(2021).Chitinozoans with "skirt": Ultrastructure and palaeoecological implications of carina in Cyathochitina Eisenack, 1955.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,570,16.
MLA	Wang, Wenhui,et al."Chitinozoans with "skirt": Ultrastructure and palaeoecological implications of carina in Cyathochitina Eisenack, 1955".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 570(2021):16.