Morphology Summary - Copella arnoldi
Morphology Data of Copella arnoldi
Identification keys
Abnormalities
Main Ref. Marinho, M.M.F. and N.A. Menezes, 2017
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) elongated
Cross section circular
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

This species is distinguished from all its congeners, except some specimens of C. nattereri by the procurrent caudal-fin rays that are hyaline (vs. black); further differs from C. nattereri by the absence of a black mark on each body scale (vs. presence); further differs from all its congeners by having a pigmented area extending anterodorsally from ventral tip of the dentary to ventral portion of the eye (vs. absent). Colouration: some males are unique in having brilliant white spots on scales of the third, fourth, fifth, and sixth longitudinal scale rows (Ref. 137764).

Ease of Identification

Meristic characteristics of Copella arnoldi

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 10 - 10
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal
total 37 - 37

Fins

Dorsal fin(s)

Attributes
Fins number
Finlets No. Dorsal   
Ventral  
Spines total
Soft-rays total 8 - 8
Adipose fin

Caudal fin  (shape guide)

Attributes

Anal fin(s)

Fins number
Spines total
Soft-rays total 9 - 9

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   8 - 9
Pelvics Attributes  
Position    
Spines     
Soft-rays   6 - 7
(e.g. 9948)
(e.g. oophagy)
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