| 主要參考文獻 | Fischer, W., M.-L. Bauchot and M. Schneider (eds.), 1987 |
| 形態描述的性別 | |
| Bones in OsteoBase |
| 特殊器官 | no special organs |
| 不同的外表 | males alike females |
| 不同的顏色 | males alike females |
| 附註 |
| 顯著的特徵 | striking type of mouth |
| 側面體型 | elongated |
| 橫切面 | circular |
| 頭部背面描繪 | more or less straight |
| 眼的類型 | more or less normal |
| 口/吻尖的類型 | more or less normal |
| 口的位置 | sub-terminal/inferior |
| Type of scales | ganoid scales |
| 鑑別 |
Snout moderately long and pointed at tip. Lower lip continuous, not interrupted at centre. Barbels halfway between tip of snout and mouth, reaching the latter. Five rows of scutes, dorsal 11-17, lateral 49-70, but usually 55-56 on each side, ventral 10-16, with no smaller plates between dorsal and ventral rows. Color of back grey, flanks lighter, belly white. |
| 鑑定難易度 |
| 側線 | 打斷: No |
| 側線上的鱗片 | 0 - 0 |
| 側線上鱗片數 | |
| 側生系列的鱗片 | |
| 側線上的鱗片列 | 0 - 0 |
| 側線下的鱗片列 | 0 - 0 |
| 尾梗周圍的鱗片 | |
| 觸鬚 | 0 |
| 鰓裂 (僅限於鯊魚/ 魟魚) | |
| 鰓耙 | |
| 在下肢上 | |
| 上枝鰓耙 | |
| 總數 | 24 - 42 |
| 脊椎骨 | |
| 肛門前 | |
| 總數 |
| 屬性 | |
| 鰭數 | 1 |
| 離鰭號碼 | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| 棘總數 | 0 - 0 |
| 軟條總數 | 45 - 57 |
| 脂鰭 | absent |
| 屬性 | more or less truncate; more or less normal |
| 鰭數 | 1 |
| 棘總數 | |
| 軟條總數 | 23 - 37 |
| 胸鰭 | 屬性 more or less normal |
| 脊椎 | |
| 軟條 | |
| 骨盤的 | 屬性 more or less normal |
| 位置 abdominal before origin of D1 | |
| 脊椎 | |
| 軟條 |