古脊椎动物学报（中英文）2024，Vol.62Issue(3)：201-224,24.DOI:10.19615/j.cnki.2096-9899.240726
新疆下三叠统韭菜园组一新小型兽头类
A new small baurioid therocephalian from the Lower Triassic Jiucaiyuan Formation,Xinjiang,China
摘要
Abstract
Several therocephalian species,mainly represented by cranial material from the late Permian,have been reported from China in recent years.Here we describe a tiny new baurioid therocephalian,Jiucaiyuangnathus confusus gen.et sp.nov.,from the Jiucaiyuan Formation,Xinjiang,China.The new taxon is represented by a partial snout with occluded partial lower jaw and two postcranial skeletons.Although juvenile in stage,the new species is diagnosed by the following features:round pit in middle of lateral surface of maxilla;lacrimal contact nasal;fossa for dentary tooth on the posterior end of the premaxilla,lateral to the anterior choana;two small vertical triangular ridges extending dorsally and ventrally on the vomerine anterior portion,and bordering a thin vomerine foramen laterally;anterior projection of the lateral part of the frontal on the nasal;symphyseal region of the dentary projected anteriorly;5 upper premaxillary teeth,upper and lower canines absent,diastema between the last premaxillary upper incisor and first maxillary tooth present,no diastema separating anterior from posterior dentition in the mandible,10 maxillary teeth and 12 dentary teeth,posterior postcanine expands mesiodistally,having a main large cusps and tiny anterior and posterior accessory cusps in line;neural arches of the atlas fused by the neural spine,neural spine of the axis projected posteriorly,procoracoid foramen lies between procoracoid and scapula.Features of the dentition resembles those of the small baurioid Ericiolacerta parva from South Africa and Silphedosuchus orenburgensis from Russia.The specimens provide the rare opportunity to know in detail the postcranial skeleton of baurioids.关键词
新疆吉木萨尔/早三叠世/韭菜园组/兽头类,包氏兽超科Key words
Jimsar,Xinjiang/Early Triassic/Jiucaiyuan Formation/Therocephalia,Baurioidea分类
生物科学引用本文复制引用
刘俊,Fernando ABDALA..新疆下三叠统韭菜园组一新小型兽头类[J].古脊椎动物学报（中英文）,2024,62(3):201-224,24.基金项目
中国科学院战略性先导科技专项(B类)(编号:XDB26000000)和中国科学院国际伙伴计划项目(编号:132311KYSB20190010)资助. Thanks to Liu Yudong for discovering and preparing the specimens,Wang Chaoxiong for 3D reconstruction of CT images,and Carmen Fernandez from the Unidad Ejecutora Lillo helped with figures 5 and 6.The comments from Luisa Pusch and Julia A.Suchkova significantly improved this paper.This work is supported by the Strategic Priority Research Program of Chinese Academy of Sciences(XDB26000000). （B类）
