Source / 来源: 讲解手册/珍奇柜-颌展签五审_0923.pdf
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Material / 材料类型: exhibit_context
Text extraction / 提取方式: native

Source transcription; wording is retained as supplied. OCR may contain recognition errors; consult the PDF/image.
来源转录；保留原展签措辞。OCR可能包含识别误差，请核对PDF或图像。

东北七鳃鳗
现生无颌脊椎动物的重要代表
东北七鳃鳗体形细长，没有上下颌和
成对的鳍。头部两侧各有七个鳃孔，
“七鳃鳗”因此得名。七鳃鳗属于现生
无颌脊椎动物，其所在的圆口类是有
颌脊椎动物的现生姐妹群。七鳃鳗具
有自身长期演化形成的独特结构，同
时也保留了研究脊椎动物早期演化的
重 要 信 息。其 基 因 组、神 经 嵴 发 育、
神经系统和免疫系统等受到广泛研究，
是探索脊椎动物关键结构与生理系统
演化的重要现生参照。
Eudontomyzon morii
An Important Living Representative of Jawless Vertebrates
Eudontomyzon morii has a slender, elongate body and lacks 
paired fins and jaws. Seven pairs of gill openings are 
arranged along the sides of the head, a characteristic feature 
of lampreys. The larvae live buried in sandy or muddy 
substrates, whereas adults inhabit freshwater streams and 
rivers. As a living jawless vertebrate, Eudontomyzon morii 
retains a combination of ancestral vertebrate features and 
highly specialized characteristics that evolved during the 
long independent history of lampreys. Studies of its genomes, 
neural crest development, nervous system and immune 
system provide important comparative information for 
understanding the origin and early evolution of key 
vertebrate traits.