古脊椎动物学报2021，Vol.59Issue(2)：95-105,11.DOI:10.19615/j.cnki.1000-3118.201020
眼齿鸟再分析显示其蜥蜴属性
Reanalysis of Oculudentavis shows it is a lizard
摘要
Abstract
The recent finding of a fossil entombed in a Late Cretaceous amber-Oculudentavis khaungraae-was claimed to represent a humming bird-sized dinosaur.Regardless of the intriguing evolutionary hypotheses about the bauplan of Mesozoic dinosaurs(including birds)posited therein,this enigmatic animal demonstrates various morphologies resembling lizards.If Oculudentavis was a bird,it challenges several fundamental morphological differences between Lepidosauria and Archosauria.Here we reanalyze the original computed tomography scan data of the holotype of Oculudentavis khaungraae(HPG-15-3).Morphological evidences demonstrated here highly contradict the avian or even archosaurian phylogenetic placement of the species.In contrast,our analysis revealed multiple skull morphologies of HPG-15-3 resembling those of squamates,including pleurodont marginal teeth,an open infratemporal fenestra,and the presence of palatal dentition.Based on these new morphological information,the phylogenetic position of Oculudentavis was analyzed in a data matrix sampling across the Diapsida.Taxon sampling of the data matrix included multiple species of lizards,birds,and major clades in Lepidosauromorpha and Archosauromorpha.In the strict consensus tree,Oculudentavis is nested within Squamata.These results show that morphology of the Oculudentavis khaungraae holotype supports a squamate rather than avian or dinosaurian affinity of the species.关键词
缅甸/白垩纪/鸟类/蜥蜴/双孔类/有鳞类/眼齿鸟Key words
Burma/Cretaceous/bird/lizard/Diapsida/Squamata/Oculudentavis分类
生物科学引用本文复制引用
李志恒,王维,胡晗,王敏,易鸿宇,卢静..眼齿鸟再分析显示其蜥蜴属性[J].古脊椎动物学报,2021,59(2):95-105,11.基金项目
中国科学院战略性先导科技专项(B类)(编号:XDB26000000)资助.We thank Li Gang for providing the original CT scan data for reanalyzing,Yang Hong-Yu for drawing a life reconstruction of HPG-15-3,Guo Rui for drawing illustrations of HPG-15-3 and the green lizard.We thank colleagues at Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences for their great help during preparing and writing the manuscript.This work was supported by the Strategic Priority Research Program of Chinese Academy of Sciences Grant No.XDB26000000. （B类）
