Morphology Data of Melanorivulus paresi
Identification keys
Abnormalities
Main Ref. Costa, W.J.E.M., 2007
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 elongated
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales cycloid scales
Diagnosis

Distinguished from all other species of the subgenus Melanorivulus in having small white spots forming a reticulate pattern on the dorsal fin and the basal part of the anal fin, and forming narrow bars on the caudal fin in males, and a narrow basihyal, width about 35% of the basihyal length. Can be diagnosed from all congeners by the unique combination of the following characters: entire flank with a continuous mid-lateral dark gray stripe; scales in longitudinal series 30-31; flank with close red dots, arranged in chevron-like series with the vertex on the mid-lateral line; and caudal fin in males with red bars (Ref. 76975).

Ease of Identification

Meristic characteristics of Melanorivulus paresi

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 16 - 16
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 9 - 9
Vertebrae
preanal
total 29 - 30

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total
Soft-rays total 8 - 10
Adipose fin absent

Caudal fin

Attributes more or less truncate

Anal fin(s)

Fins number
Spines total
Soft-rays total 12 - 14

Paired fins

Pectoral Attributes  more or less normal
Spines     
Soft-rays   13 - 13
Pelvics Attributes  more or less normal
Position    abdominal  before origin of D1
Spines     
Soft-rays   7 - 7
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