Morphology Data of Apteronotus pemon
Identification keys
Abnormalities
Main Ref. de Santana, C.D. and R.P. Vari, 2013
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
Cross section compressed
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

This species can be distinguished from its congeners by the following set of characters: A 152-160; P 16; C 18-20; precaudal vertebrate 18-19; total vertebrae 63-82; 5th infraorbital present as a tubular laterosensory canal segment; interobital distance 9.7-14.6% of HL; number of scales along the lateral line 74-83; ossified lateral ethmoid; number of scales above the lateral line at the midbody 9-10; mouth length 30-44.5% of HL; tail length 13.0-17.5% of LEA; tail depth 9.9-15.4% of CL; ocular diameter 4.0-6.3% of HL. Colouration: body and head brown; distinct, broad, light coloured longitudinal band extending from chin along dorsal midline of head and body to beginning of dorsal filament; pectoral- and anal-fin rays dark brown with translucent interradial membranes; light band encircling base of caudal fin; caudal fin pale at base, dark brown posteriorly (Ref. 93867).

Ease of Identification

Meristic characteristics of Apteronotus pemon

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
Vertebrae
preanal 18 - 19
total 63 - 82

Fins

Dorsal fin(s)

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

Caudal fin

Attributes

Anal fin(s)

Fins number 1
Spines total
Soft-rays total 152 - 160

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   16 - 16
Pelvics Attributes  
Position    
Spines     
Soft-rays   
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17