古脊椎动物学报2023，Vol.61Issue(2)：81-89,9.DOI:10.19615/j.cnki.2096-9899.221126
基于CT数据的副云南鱼腰带部位形态再研究
The pelvic morphology of Parayunnanolepis(Placodermi,Antiarcha)revealed by tomographic data
摘要
Abstract
The pelvic morphology,and whether the pelvic fin is present or absent in the earliest jawed vertebrates are key in interpreting the origin of vertebrate paired fins.Parayunnanolepis xitunensis,an antiarch placoderm from the Early Devonian of Yunnan,South China,was previously described to possess the earliest evidence of both dermal and endoskeletal pelvic girdles,presumably for the attachment of the pelvic fins.Here,we redescribe the pelvic region of the holotype based on high-resolution computed tomographic data.Instead of having two large plates previously designated as dermal pelvic girdles,Parayunnanolepis possesses three pairs of lateral pelvic plates,and one large oval median pelvic plate.The paired pelvic plates are flat ventral plates,and differ from other dermal pelvic girdles in lacking a dorsal extension.There is no definitive evidence for the presence of an endoskeletal pelvic girdle in Parayunnanolepis,although the possibility cannot be ruled out.A comparison of the dermal pelvic plates in various jawed stem-gnathostomes suggests the presence of both paired and median pelvic plates is shared by different lineages and might be plesiomorphic.The jawed stem-gnathostomes may have recruited the ventral dermal skeleton of the post-thoracic body into different functional units.关键词
早泥盆世/成对附肢/腹鳍/盾皮鱼/胴甲鱼类/三维重建Key words
Early Devonian/paired appendages/pelvic fin/placoderms/antiarchs/three-dimensional reconstruction分类
生物科学引用本文复制引用
朱幼安,王雅婧,瞿清明,卢静,朱敏..基于CT数据的副云南鱼腰带部位形态再研究[J].古脊椎动物学报,2023,61(2):81-89,9.基金项目
国家自然科学基金(批准号:42272028)、中国科学院战略性先导科技专项(编号:XDB26000000,XDA19050102)和中国科学院率先行动"百人计划"B类青年项目(编号:E0CQ010103)资助.We thank HOU Yemao for the scanning of the specimen.We thank the two reviewers for their constructive comments to help improve the manuscript.This study was funded by National Natural Science Foundation of China(42272028),Strategic Priority Research Program of Chinese Academy of Sciences(XDB26000000,XDA19050102),and one hundred talents project from the Chinese Academy Sciences(E0CQ010103). （批准号:42272028）
