Morphology Data of Onychostoma krongnoense
Identification keys
Abnormalities
Main Ref. Hoang, H.D., H.M. Pham and N.T. Tran, 2015
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks Males with numerous and dense breeding tubercles in anal-fin rays (vs. few and sparse or absent in females).

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral fusiform / normal
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth sub-terminal/inferior
Type of scales
Diagnosis

Onychostoma krongnoensis can be diagnosed from its congeners by a combination of the following characters: mouth wide (width 1.4?1.6 times in HW); 14-17 predorsal scales; caudal peduncle slender and long (2.5?3.3 times longer than deep); barbels absent in adults and juveniles; dorsal fin with a strong serrated last simple ray; eye diameter small (4.6?5.6 times in HL); and tip of snout with 2?3 irregular transverse rows of 13?46 small and large tubercles (Ref. 102622).

Ease of Identification

Meristic characteristics of Onychostoma krongnoense

Lateral Lines Interrupted: No
Scales on lateral line 47 - 50
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 7 - 7
Scale rows below lateral line 5 - 5
Scales around caudal peduncle 15 - 6
Barbels 0
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total
Soft-rays total 12 - 12
Adipose fin absent

Caudal fin

Attributes forked

Anal fin(s)

Fins number
Spines total
Soft-rays total 8 - 8

Paired fins

Pectoral Attributes  more or less normal
Spines     
Soft-rays   17 - 17
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Spines     
Soft-rays   9 - 9
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