鱼类属于脊椎动物门。根据Nelson(1994年)统计,全球现生种鱼类共有24618种,占已命名脊椎动物一半以上,且新种鱼类不断被发现,平均每年已约150种计,十多年应已增加超过1500种,所以全球已命名的鱼种应在26887种。
3.17 鱼纲 Class Pisces 概述 Introduction. 鱼纲的主要特征, 包括十大系统的形态、结构与功能 Main characteristics of Class Pisces, including form, ...
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棘鱼纲 [古生] Acanthodii
盾皮鱼纲 [古生] Placodermi
鳍甲鱼纲 Pteraspidomorphi
软骨鱼纲 [鱼] Chondrichthyes ; Selachii ; Cartilaginous Fish
头甲鱼纲 Cephalaspidomorphi
硬骨鱼纲 [鱼] Osteichthyes ; Osteichyes ; Ostariophysi
辐鳍鱼纲 Actinopterygii ; Class Actinopterygli ; Mammalia
条鳍鱼纲 Actinopterygii ; Class Actinopterygii
文昌鱼纲 APPENDICULARIA ; Amphioxi ; Amphioxichthyes ; Branchiostoma belcheri
这是与小型鱼纲做斗争的光脚男孩,古老的战斗正在进行着。
This was barefoot boy against bantamweight Pisces, and the age-old fight was on.
鱼纲冷血水生脊椎动物中的任意一种,具有鳍、鳃和流线体型,尤指包括。
Any of numerous cold-blooded aquatic vertebrates of the superclass Pisces, characteristically having fins, gills, and a streamlined body and including specifically.
属软骨鱼纲的鱼软骨鱼纲鱼的一种,以软骨骨架和板状鱼鳞为特征,包括鲨、鳐、灰鳐。
Any of numerous fishes of the class Chondrichthyes, characterized by a cartilaginous skeleton and placoid scales and including the sharks, rays, and skates.
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