古脊椎动物学报2008，Vol.46Issue(3)：161-170,10.
云南昭通早泥盆世肉鳍鱼类一新属
AN EARLY DEVONIAN (PRAGIAN) SARCOPTERYGIAN FROM ZHAOTONG, YUNNAN, CHINA
摘要
Abstract
A new basal dipnomorph sarcopterygian, Arquatichthys porosus gen. et sp. nov., from the Lower Devonian (Pragian) of northeastern Yunnan, China, is described on the basis of a nearly com-plete mandible and several isolated scales. It closely resembles basal dipnomorphs in following charac-ters : short and L-shaped pit-line of infradentary 4 ( uniquely shared with dipnomorphs), small parasym-physial dental plate attachment, three coronoids, broad "tooth pavement" on the lateral portion of coro-noids, large adductor fossa, irregularly scattered pores of mandibular sensory canal on the lateral sur-face of mandible, and distinct anternventral process of rhomboid scale. Arquatichthys has a unique man-dible morphology characterized by a strongly arched upper margin, and an elongated overlapped area by quadratojugal and maxillary. As the second dipnomorph from the Pragian of China, Arquatichthys adds evidences to understanding the early diversification of sarcoptcrygians. The character transitions of scales are discussed within the framework of the interrelationships of early sarcopterygians.关键词
云南/早泥盆世/基干肺鱼形动物/鳞片演化Key words
Yunnan/Early Devonian/basal dipnomorph/scale character transitions分类
生物科学引用本文复制引用
卢静,朱敏..云南昭通早泥盆世肉鳍鱼类一新属[J].古脊椎动物学报,2008,46(3):161-170,10.基金项目
国家重点基础研究发展规划项目(编号:2006CB806400),国家自然科学基金重点项目(编号:40332017),国家基础科学人才培养基金特殊学科点项目(编号:J0630965)和中国科学院知识创新工程青年人才领域前沿项目(编号:KL207409)资助. （编号:2006CB806400）
