Main Ref. | Chen, Z.M., W.X. Li and J.X. Yang, 2009 |
Appearance refers to | |
Bones in OsteoBase |
Specialized organs | |
Different appearance | |
Different colors | |
Remarks | Exhibits sexual dimorphism only in mature individuals. Mature males with the pre-suborbital area thickened, but not calloused, like a swollen mound extending obliquely from the suborbital area to base of the outer rostral barbel. The pectoral fin of mature males in most other species of the same genus is thickened, stiffened, or broadened, or calloused on its dorsal side, but this kind of character is not shown in the mature males of this species (Ref. 80923). |
Striking features | |
Body shape lateral | elongated |
Cross section | |
Dorsal head profile | |
Type of eyes | |
Type of mouth/snout | |
Position of mouth | sub-terminal/inferior |
Type of scales | scales embedded or partly/completely absent |
Diagnosis |
Distinguished from all congeners by the unique combination of the following characters: dorsal-fin rays 3,8½ -9½ ; anal-fin rays 3,5- 5½ ; pectoral-fin rays 1,11; scales absent; two saddle-like dark blotches with fuzzy borders cranial to the dorsal fin and four saddle-like dark blotches caudal to the dorsal fin; distal margin of dorsal fin emarginate; pelvic fin reaching caudally almost to the anus; anus located immediately cranial to the origin of the anal fin; caudal fin forked; caudal chamber of air bladder reduced to a small free protuberance; head slightly laterally compressed, head depth greater than head width at nape; caudal peduncle length 18.0-20.0% of SL; caudal peduncle depth 7.8-8.4% of SL; eye diameter 17.6-21.4% of HL; body depth 60.7-70.2% of HL; caudal peduncle depth 39.1-45.0% of caudal peduncle length; body width at the base of caudal peduncle 59.0-68.0% of body depth at the base of caudal peduncle (Ref. 80923). |
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 | 10 - 10 |
Vertebrae | |
preanal | |
total |
Attributes | no striking attributes |
Fins number | 1 |
Finlets No. | Dorsal |
Ventral | |
Spines total | |
Soft-rays total | |
Adipose fin | absent |
Attributes | forked |
Fins number | |
Spines total | |
Soft-rays total |
Pectoral | Attributes more or less normal |
Spines | |
Soft-rays 12 - 12 | |
Pelvics | Attributes more or less normal |
Position abdominal behind origin of D1 | |
Spines | |
Soft-rays 9 - 9 |