形态学资料 Brycinus luteus
检索表
Abnormalities
主要参考文献 Paugy, D., 2003
形态描述的性别
Bones in OsteoBase

性别内容

特殊器官 no special organs
不同的外表 always different morphology between mature adults
不同的颜色 males alike females
附注 Sexual dimorphism affecting the anal-fin shape in adult males.

稚鱼与成鱼的特徵描述

显着的特徵 none
侧面体型 fusiform / normal
横切面
头部背面描绘 more or less straight
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 cycloid scales
鉴别

Diagnosis: parietal fontanella always present, also in adults, open; 5.5 scales above lateral line; 25-31 lateral line scales; 15-16 anal fin branched rays; 6/8 premaxillary teeth; 16-17 gill rakers on lower limb of first gill arch; gill rakers long (Ref. 2880, 81279).

Description: dorsal-fin origin at about the same level as pelvic-fin insertions; anal fin with 3 unbranched and 15-16 branched rays; six outer premaxillary teeth alined in a single row; equal jaws; sexual dimorphism in males as in Alestes species (Ref. 2880, 81279).

Colouration: Body with humeral spot and pre-caudal spot dark extending to hind margin of caudal-fin fork; body silvery, back dark yellowish , ventral zone white; fins except pectoral and ventrals (no color) yellow; these colours disappear after preservation, but dark band on sides from gill cover to caudal fin and broadening at about mid-length of body, becomes more apparent (Ref. 2880, 81279).

鉴定难易度

分节特性 Brycinus luteus

侧线 1 打断: No
侧联机的鳞片 25 - 31
侧联机鳞片数
侧生系列的鳞片
侧联机的鳞片列 5.5 - 5.5
侧线下的鳞片列 3.5 - 3.5
尾梗周围的鳞片
触须 0
鳃裂 (仅限于鲨鱼/ 鱼)
鳃耙
在下肢上 16 - 17
上枝鳃耙
总数
脊椎骨
肛门前
总数

背鳍 (s)

属性 no striking attributes
鳍数 1
离鳍号码 Dorsal   
Ventral  
棘总数
软条总数
脂鳍 present

尾鳍

属性 forked; more or less normal

臀鳍 (s)

鳍数 1
棘总数 0 - 0
软条总数 18 - 19

偶鳍

胸鳍 属性  more or less normal
脊椎     
软条   
骨盘的 属性  more or less normal
位置    abdominal  beneath origin of D1
脊椎     
软条   
主要参考文献 (例如 9948)
字汇 ( 例如 cephalopods )
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