Warning: file_put_contents(): Only 0 of 5279 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/totle.com.cn/index.php on line 55 protochordates是什么意思，protochordates的翻译，protochordates音标、读音、用法和例句_乐豆毛深蓝词典
These characteristics are shared by brachiopods and pterobranchs (a hemichordate group) as well as by echinoderms, protochordates, amphioxus, and vertebrates. 脊索动物的祖先可能类似尾索动物的幼体，后向两个方向发展，一是经过变态，成体为固着生活，具鳃裂作为取食和呼吸器官；