欢迎来到天天文库
浏览记录
ID:49873276
大小:29.50 KB
页数:3页
时间:2020-03-05
《鱼类学_鲈形目v1.1.doc》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、1(2)体延长成带状,无尾鳍(带鱼亚目)·························带鱼2(1)体不延长,有尾鳍3(4)腹部无腹鳍(鲳亚目)(非鲳亚目特征,仅银鲳无腹鳍)···················································银鲳4(3)腹部有腹鳍5(6)头背部有吸盘(䲟亚目)·····································䲟6(5)头背部无吸盘7(8)在第一鳃弓上有由上鳃骨扩大而成的鳃上器官(攀鲈亚目)·····乌鳢8(7)在第一鳃弓上没有由上鳃骨扩大而成的鳃上器官9
2、(10)左右腹鳍极接近,大多数愈合成吸盘(虾虎鱼亚目)眼正常,不突出;胸鳍基底部肌肉不发达··············纹缟虾虎鱼眼突出;胸鳍基底部肌肉发达····························弹涂鱼10(9)左右腹鳍不显著接近,不愈合成吸盘11(12)上颌骨固着于前颌骨(鲭亚目)背鳍、臀鳍、小鳍均为黄色:黄鳍金枪鱼其余不为黄色,鲐第二背鳍与臀鳍后各有五个小鳍,,蓝点马鲛第二背鳍与臀鳍后小鳍数目多于五个12(11)上颌骨不固着于前颌骨13(14)腹鳍喉位或不存在(鳚亚目)14(13)腹鳍一般胸位(鲈亚目)15(16)左右下咽骨愈合
3、(丽鱼科)体灰黑色莫萨比克罗非鱼16(15)左右下咽骨不愈合17(22)上颌骨外露,一般不为眶前骨所遮盖18(19)臀鳍具鳍棘3枚(鮨科)花鲈体测及背鳍基部散布着黑色斑点,无带纹;青石斑鱼全身散步黄色小点,体测有五条暗色横带,鳜在背鳍的第六到7根刺的下方有一较宽的暗棕色垂直纹带,体测有不规则褐色斑点和斑块19(18)臀鳍具鳍棘2枚20(21)体一般被栉鳞(鱚科)体侧具斑点:斑鱚体侧无斑点:多鳞鱚21(20)体一般被小圆鳞,有时侧线上具棱鳞(鲹科)侧线的全部被棱鳞竹荚鱼其余侧线的一部分被棱鳞第二背鳍和臀鳍后方有1小鳍:蓝圆鲹第二背鳍和臀鳍后方有6-
4、7个小鳍:大甲鲹22(17)上颌骨全部或大部分为眶前骨所遮盖23(24)臀鳍鳍棘2个以下(石首鱼科)(1(2)鳔前端具侧囊(叫姑鱼属)·······························叫姑鱼2(1)鳔前端无侧囊3(6)鳔的两侧有10余对至20余对侧肢,侧肢只有腹分支而无背分支4(5)颏孔5个(黄姑鱼属)···································黄姑鱼5(4)颏孔6个(白姑鱼属)···································白姑鱼6(3)鳔的两侧有10余对至30余对侧肢,侧肢具背分支和
5、腹分支7(8)鳔的腹分支和下分支短(鮸属)·······························鮸8(7)鳔的腹分支和下分支延长9(10)枕骨嵴显著········································棘头梅童鱼10(9)枕骨嵴不显著(黄鱼属)11(12)尾柄长为尾柄高的3倍余;鳞较小························大黄鱼12(11)尾柄长为尾柄高的2倍余;鳞较大························小黄鱼)24(23)臀鳍鳍棘3个以上25(26)侧线上方鳞片一般斜行(笛鲷科)(红鳍笛鲷
6、)26(25)侧线上方鳞片不斜行(鲷科)体淡红色,背部散布蓝色斑点:真鲷体青灰色参杂黄色:黑鲷
此文档下载收益归作者所有