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贵州空棘鱼属的修订与系统发育分析

2009年 第47卷 第3期: 165~177

发表日期:2009-09-14来源:放大 缩小
编辑:耿丙河,朱敏,金帆
摘要:依据在云南富源中三叠世法郎组竹杆坡段发现的新材料,对关岭贵州空棘鱼(Guizhoucoelacanthus guanlingensis)进行了补充描述,并修订了鼻骨、顶骨、后顶骨、额外肩胛骨、眶后骨、偶鳍、鳞片等特征。系统发育分析表明,贵州空棘鱼属与Whiteia + Piveteauia 构成姐妹群,其共有离征包括:两对顶骨的大小相近,第一背鳍鳍条数小于8。建议将贵州空棘鱼属归入怀特鱼科(Whiteiidae)。
关键词:云南,中三叠世,空棘鱼类,系统发育
卷期:47卷 03期
 
 

A REVISION AND PHYLOGENeTIC ANALYSIS OF GUIZHOUCOELACANTHUS (SARCOPTERYGII, ACTINISTIA) FROM THE TRIASSIC OF CHINA

 

GENG Bing-HeZHU Min, JIN Fan

 

Abstract  We re-describe the coelacanth Guizhoucoelacanthus guanlingensis Liu et al. 2006, mainly based on a new articulated specimen from the Middle Triassic of Fuyuan, Yunnan Province, China. It is characterized by its small orbital openings, and the postorbital spanning the intracranial joint. The phylogenetic analysis suggests that Guizhoucoelacanthus is the sister taxon of Whiteia + Piveteauia. Guizhoucoelacanthus is assigned to the family Whiteiidae with derived characters including: anterior and posterior pairs of parietals of similar size; fin rays in anterior dorsal fin less than eight.

Key words  Yunnan, Middle Triassic, coelacanths, phylogeny

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