摘要
文中对褐牙鲆和狭鳞庸鲽的头颅骨骼进行了比较研究。两者共同特征均有眼间隔发达、无眶蝶骨、翼蝶骨不发达 ,上枕骨与额骨连接 ,左右颅顶骨分离 ,但无基蝶骨 ,也没有伪头中骨。褐牙鲆与狭鳞庸鲽在骨骼形状结构上的分异多停留于骨块的形状、大小差异及嵴的发达程度上 ,其主要区别体现在围眼眶骨、鼻区骨块和颌齿排列等。最后还讨论了褐牙鲆和狭鳞庸鲽的特化以及鲽形目的起源问题。从骨骼结构看 。
In the paper a comparative analysis of the skulls of Bastard halibut ( Paralichthys olivaceus) and Pacific halibut ( Hippoglossus stenolepis ) are studied. Their common characteristics are that the interorbital bone is well developed, but the alisphenoid is not. They have no orbitosphenoi. The interorbital bone and frontal is connected. The right and left parietal are detached. They both have no basisphenoid and pseudomesia bar. Most differences of the skulls between Bastard halibut ( Paralichthys olivaceus) and Pacific halibut ( Hippoglossus stenolepis) still rest on the shape, size or the developed degree of the crest. The main differences embody in the circumorbital series, nasal region and jaw teeth. Finally the authors discusse the specialization of Bastard halibut and Pacific halibut, and the evolution of the Pleuronectidae. It seems from the skulls that Pleuronectidae originate from Perciformes but not from Clupeidae.
基金
国家自然科学基金!重点项目(396 32 6 0 )资助
关键词
褐牙鲆
狭鳞庸鲽
头颅骨
解剖
起源
Bastard halibut
Pacific halibut
skull
anatomy
origin
