| Main Ref. | Schwarzhans, W., P.R. Møller and J.G. Nielsen, 2005 |
| Appearance refers to | |
| Bones in OsteoBase |
| Specialized organs | |
| Different appearance | |
| Different colors | |
| Remarks |
| Striking features | none |
| Body shape lateral | elongated |
| Cross section | compressed |
| Dorsal head profile | clearly convex |
| Type of eyes | more or less normal |
| Type of mouth/snout | more or less normal |
| Position of mouth | terminal |
| Type of scales | |
| Diagnosis |
Diagnosis: This species is characterized by the following: vertebrae 11+28-30=39-41, dorsal fin rays 70-76, anal fin rays 55-61; eyes very small (<2.0% SL); outer pseudoclasper ear-lobe shaped, the half-moon shaped ear-lobe extension inwardly directed; inner pseudoclasper firmly joined to outer pseudoclasper anteriorly, with supporter, reduced small hook-like, often with a fleshy flap at its base; 5-7 rows of small scales on the upper cheek, no scales on operculum; head profile is slender; otolith length to height ratio <2.0 (Ref. 57884). Description: Head scales present on cheeks, absent from operculum. Caudal fin well developed, free from dorsal and anal fin (Ref. 559). Description: Characterized by depth of body at origin of anal fin 15.9-19.8 (mean= 18.0) % SL; short and curved penis (Ref. 90102). |
| 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 | 14 - 18 |
| Vertebrae | |
| preanal | 10 - 11 |
| total | 39 - 41 |
| Attributes | no striking attributes |
| Fins number | 1 |
| Finlets No. | Dorsal 0 - 0 |
| Ventral 0 - 0 | |
| Spines total | 0 - 0 |
| Soft-rays total | 70 - 76 |
| Adipose fin | absent |
| Attributes | more or less truncate; more or less normal |
| Fins number | 1 |
| Spines total | 0 - 0 |
| Soft-rays total | 55 - 61 |
| Pectoral | Attributes more or less normal |
| Spines 0 | |
| Soft-rays 20 - 21 | |
| Pelvics | Attributes joint to one spine only |
| Position jugular before origin of D1 | |
| Spines | |
| Soft-rays |