CAJ | 학술논문

Taoqupognathus为潘德尔刺类的一多分子器官属.其特征明显:单维,片状,具有不同发育程度的后缘隆起.该属仅在澳大利亚东部和中国上奥陶统分布,已知有4种,而且具有较精确的区域对比价值.形态特征的支序分析显示:在晚奥陶世中期(Eastonian), T.philipi-T.blandus-T.tumidus谱系代表了该属的主要演化趋向.Taoqupognathus属的分布表明,澳大利亚东部和中国在当时有着密切的生物地理联系.该属可能在Eastonian早期起源于新南威尔世中部地区,在中-晚Eastonian期时达到发展高潮,并已扩散到中国各板块.继而可能在Eastonian末期或Bolindian早期全部绝灭.
Taoqupognathus위반덕이자류적일다분자기관속.기특정명현:단유,편상,구유불동발육정도적후연륭기.해속부재오대리아동부화중국상오도통분포,이지유4충,이차구유교정학적구역대비개치.형태특정적지서분석현시:재만오도세중기(Eastonian), T.philipi-T.blandus-T.tumidus보계대표료해속적주요연화추향.Taoqupognathus속적분포표명,오대리아동부화중국재당시유착밀절적생물지리련계.해속가능재Eastonian조기기원우신남위이세중부지구,재중-만Eastonian기시체도발전고조,병이확산도중국각판괴.계이가능재Eastonian말기혹Bolindian조기전부절멸.
Taoqupognathus is a multimembrate panderodontid conodont, consisting of distinctive, blade-like, coniform elements with various degrees of posterior bulging. The genus is restricted in distribution to the Upper Ordovician of eastern Australia and China, where the four known species are useful for precise regional correlation. A cladistic analysis of morphological characters indicates that the mian evolutionary trend of Taoqupognathus appears to follow the lineage: T.philipi-T.blandus, and T.tumidus during the Eastonian (middle Late Ordovician), with T.philipi as the most primitive form. The distribution of Taoqupognathus suggests a close biogeographical link between eastern Australia and China with the genus apparently originating in central New South Wales in the early Eastonian. It then migrated to Chinese crustal blocks during the summit of its development in the mid-late Eastonian, and probably became extinct in the latest Eastonian or early Bolindian.