NIGPAS OpenIR
Synchrotron-aided reconstruction of the prioniodinin multielement conodont apparatus (Hadrodontina) from the Lower Triassic of China
Sun, Zuoyu1,2,3; Liu, Shuang1,2,3; Ji, Cheng4,5; Jiang, Dayong1,2; Zhou, Min1,2
2020-12-15
发表期刊PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
卷号560页码:11
摘要

Although natural assemblages that preserve natural associations of elements in conodont apparatus are extremely rare, they are of fundamental importance in conodont paleobiology, e.g. apparatus architecture, functional morphology, suprageneric classification and evolution. We herein report three exceptionally preserved natural assemblages from the uppermost Helongshan Formation of South Majiashan section, Chaohu City of Anhui Province, China. They were scanned using synchrotron X-ray microtomography and the three-dimensional apparatus of the end-Smithian (Olenekian, Early Triassic) Hadrodontina aequabilis was reconstructed. Our result confirms that the prioniodinin Hadrodontina has a septimembrate apparatus composed of 15 elements (angulate P-1 and P-2, breviform digyrate M, triramous S-0, extensiform digyrate S-1 and S-2, and bipennate S-3/4 elements). Within prioniodinin apparatuses that were reconstructed based on conodont natural assemblages, Hadrodontina shares more features with those of Hibbardella (Late Devonian) and Ellisonia (end-Permian), but differs in its angulate P-2 element having no distinct cusp and twisting distally, and its extensiform digyrate S-1 having an inwardly bending short anterior lateral process. Element positions of the Hadrodontina apparatus near to closure are revealed, where at the front lies an axial S-0 element, and in rostro-caudal order the paired M elements are located between S-0 and S1-4 elements and then the S1-4 elements are successively abaxially flanked the posterior process of the S-0 element. Geometric analysis demonstrated that the relative motions of the elements in Hadrodontina apparatus most probably conform to those of "single pulley hypothesis" previously proposed, but mainly differs in its extensiform digyrate S-1 and S-2 elements having reverse motions of sub-helicoidal trajectories to channel food toward the pharynx. Thus, the Hadrodontina apparatus is among the most completely characterized conodonts and serves as a template for prioniodinin multielement reconstruction. This study provides significant information on dynamic reconstruction and the phylogeny of the conodont apparatuses within the Prioniodinina.

关键词Natural assemblage 15-element apparatus Synchrotron X-ray microtomography Smithian Helongshan Formation
DOI10.1016/j.palaeo.2020.109913
收录类别SCI
语种英语
关键词[WOS]UPPER ORDOVICIAN ; NATURAL ASSEMBLAGES ; ANHUI PROVINCE ; ARCHITECTURE ; ELEMENT ; HOMOLOGIES ; SEQUENCE ; CHAOHU ; TISSUE ; JAPAN
资助项目National Natural Science Foundation of China[41920104001] ; National Natural Science Foundation of China[41876124] ; National Natural Science Foundation of China[41572008] ; National Natural Science Foundation of China[41972003] ; Strategic Priority Research Program of the Chinese Academy of Science[XDA14010404] ; Strategic Priority Research Program of the Chinese Academy of Science[XDB26000000] ; Ministry of Science and Technology[2016YFC0503301] ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS)[123107] ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS)[143108] ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS)[173123] ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS)[20182107] ; China Geological Survey[121201102000150012-09]
WOS研究方向Physical Geography ; Geology ; Paleontology
WOS类目Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号WOS:000591245000002
项目资助者National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Science ; Ministry of Science and Technology ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS) ; China Geological Survey
出版者ELSEVIER
文献类型期刊论文
条目标识符http://ir.nigpas.ac.cn/handle/332004/37623
专题中国科学院南京地质古生物研究所
通讯作者Sun, Zuoyu
作者单位1.Peking Univ, Lab Orogen Belt & Crustal Evolut, Minist Educ, Dept Geol, Yiheyuan St 5, Beijing 100871, Peoples R China
2.Peking Univ, Geol Museum, Yiheyuan St 5, Beijing 100871, Peoples R China
3.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao 266590, Shandong, Peoples R China
4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, 39 East Beijing Rd, Nanjing 210008, Peoples R China
5.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, 39 East Beijing Rd, Nanjing 210008, Peoples R China
推荐引用方式
GB/T 7714
Sun, Zuoyu,Liu, Shuang,Ji, Cheng,et al. Synchrotron-aided reconstruction of the prioniodinin multielement conodont apparatus (Hadrodontina) from the Lower Triassic of China[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2020,560:11.
APA Sun, Zuoyu,Liu, Shuang,Ji, Cheng,Jiang, Dayong,&Zhou, Min.(2020).Synchrotron-aided reconstruction of the prioniodinin multielement conodont apparatus (Hadrodontina) from the Lower Triassic of China.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,560,11.
MLA Sun, Zuoyu,et al."Synchrotron-aided reconstruction of the prioniodinin multielement conodont apparatus (Hadrodontina) from the Lower Triassic of China".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 560(2020):11.
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