形态学资料 Phractura ansorgii
检索表
Abnormalities
主要参考文献 Skelton, P.H., L.M. Risch and D. Paugy, 2003
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
眼的类型
口/吻尖的类型
口的位置 sub-terminal/inferior
Type of scales
鉴别

Diagnosis: pectoral-fin tips reaching to pelvic-fin bases; pelvic-fin insertions located on a vertical line from last dorsal-fin ray: snout length less than 55% of head length; posterior nostrils large, separated from orbits by a bony crest; humeral process blunt; branchiostegal membrane broadly notched ventrally; width of occipital process comprised 3.2 times in its length (Ref. 57128).

Description: body elongate, narrower towards caudal fin; head triangular, snout pointed, with a median, posteriorly bifurcate, bony crest; eyes rather large, with a supraorbital swelling and a bony crest above and below cheeks; mouth subterminal, barbels simple, short and thin; supraoccipital process moderately long and bluntly pointed, separated by a short distance from dorsal-fin base; humeral process well developed, oblong and blunt; an additional bony process present between the humeral and supraoccipital ones; dorsal fin triangular, positioned ahead of pelvic fins, its anterior ray minute and spinous; pectoral and pelvic fins falcate, their principal ray broad and filamentous; pectoral-fin tips reaching to pelvic-fin bases, and pelvic-fin tips to anal-fin base; anal fin with 2 spines and 9 branched rays; adipose fin small, placed above posterior part of anal fin and preceded by a short spine located at the end of a mid-dorsal bony crest; caudal peduncle long and slender, encased by bony plates; caudal fin small and triangular, with a semilunar posterior margin; a series of 25 bony plates on either side of back, from dorsal fin to caudal peduncle; a second series of 21 bony plates on either side of belly, between pelvic fins and caudal peduncle; 7+8 principal caudal fin rays (Ref. 57128).

Coloration: pale brown with black spots, belly white; 2 small black spots on dorsal fin and 3 blackish lines on caudal fin (Ref. 57128).

鉴定难易度

分节特性 Phractura ansorgii

侧线 打断: No
侧联机的鳞片
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
触须
鳃裂 (仅限于鲨鱼/ 鱼)
鳃耙
在下肢上
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   0
Ventral  0
棘总数 1
软条总数 6
脂鳍 present

尾鳍

属性 forked; more or less normal

臀鳍 (s)

鳍数 1
棘总数 2
软条总数 9

偶鳍

胸鳍 属性  more or less normal
脊椎     0
软条   10
骨盘的 属性  more or less normal
位置    abdominal  behind origin of D1
脊椎     0
软条   
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