形态学资料 Placidochromis longus
检索表
Abnormalities
主要参考文献 Hanssens, M., 2004
形态描述的性别
Bones in OsteoBase

性别内容

特殊器官
不同的外表
不同的颜色
附注

稚鱼与成鱼的特徵描述

显着的特徵
侧面体型 elongated
横切面
头部背面描绘 clearly convex
眼的类型 more or less normal
口/吻尖的类型 more or less normal
口的位置 terminal
Type of scales
鉴别

Diagnosis: small elongate species with 8-9 vertical bars below the dorsal fin; lachrymal shallow, 12.3-13.5 % head length; head shape normal; 1/1 inner tooth rows in oral jaws; snout 24.1-24.7 % head length; mouth 41.8-42.6 % head length (Ref. 55898).

Description: dorsal head profile slightly convex, straight between eyes; premaxillary pedicel prominent; mouth large, gape inclined about 20° to horizontal; maxilla extending beyond vertical at anterior margin of eye; outer oral dentition mainly bicuspid, some tricuspid teeth present; inner oral dentition an equal mix of bicuspid and tricuspid teeth; 3-4 series of scales on cheek; eye large; upper margin of eye touching dorsal head profile; lower pharyngeal jaw slender with fine teeth; gill-rakers on lower limb slender (Ref. 55898).

Coloration: Preserved: body pale brownish, with narrow vertical bars; some specimens show darker spots on vertical bars; nape and snout darker; chin and belly pale; fins pale; dorsal fin with narrow pale grey band, white submarginal band and black tips; anal fin with some faint grey spots (Ref. 55898).

鉴定难易度

分节特性 Placidochromis longus

侧线 打断: No
侧联机的鳞片 34 - 34
侧联机鳞片数
侧生系列的鳞片
侧联机的鳞片列
侧线下的鳞片列
尾梗周围的鳞片 16 - 16
触须
鳃裂 (仅限于鲨鱼/ 鱼)
鳃耙
在下肢上 11
上枝鳃耙 4
总数 15
脊椎骨
肛门前
总数

背鳍 (s)

属性
鳍数 1
离鳍号码 Dorsal   0 - 0
Ventral  0 - 0
棘总数 16 - 17
软条总数 11 - 11
脂鳍 absent

尾鳍

属性

臀鳍 (s)

鳍数 1
棘总数 3 - 3
软条总数 9 - 9

偶鳍

胸鳍 属性  
脊椎     0
软条   13 - 15
骨盘的 属性  
位置    
脊椎     
软条   
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