| Main Ref. | Sato, K., A.L. Stewart and K. Nakaya, 2013 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | |
| Body shape lateral | elongated |
| Cross section | |
| Dorsal head profile | |
| Type of eyes | |
| Type of mouth/snout | |
| Position of mouth | |
| Type of scales | placoid scales |
| Diagnosis |
A species of Apristurus with the following characters in combination: very long snout, pre-outer nostril length greater than interorbital width; short P1P2 distance, tip of pectoral fin reaching to midway of P1P2 space; small first dorsal fin and its origin always behind pelvic fin axil; long base of anal fin 13.7-17.7% of TL; vertebral counts of monospondylous 34-37 and those of precaudal diplospondylous 32-39; total counts of precaudal vertebrae 66-73; intestinal spiral valves 1013; tooth rows 37-50 on upper, 38-49 on lower jaws (Ref. 93572). |
| Ease of Identification |
| Lateral Lines | Interrupted: No |
| Scales on lateral line | |
| Pored lateral line scales | |
| Scales in lateral series | |
| Scale rows above lateral line | |
| Scale rows below lateral line | |
| Scales around caudal peduncle | |
| Barbels | |
| Gill clefts (sharks/rays only) | |
| Gill rakers | |
| on lower limb | |
| on upper limb | |
| total | |
| Vertebrae | |
| preanal | |
| total |
| Attributes | |
| Fins number | |
| Finlets No. | Dorsal |
| Ventral | |
| Spines total | |
| Soft-rays total | |
| Adipose fin |
| Attributes |
| Fins number | |
| Spines total | |
| Soft-rays total |
| Pectoral | Attributes |
| Spines | |
| Soft-rays | |
| Pelvics | Attributes |
| Position | |
| Spines | |
| Soft-rays |