Source / 来源: 讲解手册/珍奇柜-活化石展签五审_0923.pdf
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Material / 材料类型: exhibit_context
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圆尾滇东鱼
揭示雀鳝类演化早期形态的铰齿鱼类
圆尾滇东鱼是中三叠世早期铰齿鱼类
代表之一，展示了新鳍鱼类早期演化阶
段的身体特征。它身体呈长梭形，尾鳍后
缘近圆形，全身覆盖坚硬的菱形鳞片，最
大体长约5厘米。作为罗平生物群中的
小型辐鳍鱼类，圆尾滇东鱼为研究铰齿
鱼类的起源、早期形态演化以及雀鳝类
相关支系的发展历史提供了重要证据。
Diandongichthys ocellatus
A Ginglymodian Revealing Early Morphology Related to 
the Gar Lineage
Diandongichthys ocellatus is an early ginglymodian fish 
from the Middle Triassic and represents one of the early 
members of the lineage related to modern gars. It had an 
elongated fusiform body, a nearly rounded posterior 
margin of the caudal fin, and a body covered with hard 
rhomboid ganoid scales, reaching a maximum length of 
approximately 5 cm. As a small ray-finned fish from the 
Luoping Biota, Diandongichthys ocellatus provides 
important evidence for understanding the origin and early 
morphological evolution of ginglymodians, as well as the 
diversification history of gar-related lineages.