Morphology Summary - Johnius medidentatus
Morphology Data of Johnius medidentatus
Identification keys
Abnormalities
Main Ref. Geenita, K., A. Pavan-Kumar, S. Bhushan, S.M. Devi and A.K. Jaiswar, 2025
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral  (shape guide) fusiform / normal
Cross section oval
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

This species is distinguished from its congeners by the following set of characters: body oval shaped; enlarged teeth in the inner row of lower jaw moderate in size; slightly longer pre-anal length, 68.5-73.5% SL; moderately large eye, 21.8-30.1% HL; scales below lateral line, 11-13 (mode 12); and total number of outer gill rakers on first gill arch 5-8 (mode 7) + 10-15 (mode 13) = 17-24 (mode 21) (Ref. 138459).

Ease of Identification

Meristic characteristics of Johnius medidentatus

Lateral Lines Interrupted: No
Scales on lateral line 46 - 50
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 6 - 7
Scale rows below lateral line 11 - 13
Scales around caudal peduncle
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 17 - 24
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes
Fins number 2
Finlets No. Dorsal   
Ventral  
Spines total 9 - 10
Soft-rays total 25 - 30
Adipose fin absent

Caudal fin  (shape guide)

Attributes

Anal fin(s)

Fins number 1
Spines total
Soft-rays total 7 - 7

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   14 - 18
Pelvics Attributes  
Position    
Spines     
Soft-rays   5 - 5
(e.g. 9948)
(e.g. oophagy)
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