主要参考文献 | Nakaya, K. and K. Sato, 2000 |
形态描述的性别 | |
Bones in OsteoBase |
特殊器官 | |
不同的外表 | |
不同的颜色 | |
附注 | Adult females have larger pelvic fins with longer bases than the adult males. |
显着的特徵 | |
侧面体型 | elongated |
横切面 | |
头部背面描绘 | more or less straight |
眼的类型 | |
口/吻尖的类型 | |
口的位置 | |
Type of scales | placoid scales |
鉴别 |
Diagnostic features include the very short abdomen, with interspace between pectoral and pelvic fins base shorter than 3/5 of anal fin base length; pectoral fin tip reaching beyond the midpoint between pectoral and pelvic fins; first dorsal fin smaller in area than the second dorsal; posterior end base (axil) of second dorsal clearly in front of anal fin axil; low anal fin with a long base. Egg capsule very slender; without tendrils, conical posterior end. Claspers without hooks, with posterior margin of exorhipidion forming a free lobe (Ref. 37959). Black, brown or grey (Ref. 11146), without conspicuous markings on fins (Ref. 244). |
鉴定难易度 |
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 |
属性 | |
鳍数 | 2 |
离鳍号码 | Dorsal 0 - 0 |
Ventral 0 - 0 | |
棘总数 | 0 - 0 |
软条总数 | 0 - 0 |
脂鳍 | absent |
属性 | other (see remark); asymmetric |
鳍数 | 1 |
棘总数 | 0 - 0 |
软条总数 | 0 - 0 |
胸鳍 | 属性 more or less normal |
脊椎 0 | |
软条 0 - 0 | |
骨盘的 | 属性 more or less normal |
位置 abdominal before origin of D1 | |
脊椎 0 | |
软条 0 - 0 |