Morphology Data of Ctenopoma nigropannosum
Identification keys
Abnormalities
Main Ref. Norris, S.M., 2008
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 fusiform / normal
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

Diagnosis: dorsal fin with 18-20 spines (17, 21 rare) and 10-12 (9, 13 rare) soft rays; anal fin with 8-9 spines (10 rare) and 10-12 (9, 13 rare) soft rays; 12-15 (mode 14) pectoral fin rays; dorsal profile rounded; snout blunt; body fusiform; pelvic fin clear; frequently an oblong brown bar on caudal peduncle; overall pigmentation usually grey (Ref. 81650).

Description: body typically fusiform, with blunt snout and head; 15-20 scales in upper lateral line, 6-16 in lower; 2-4 scales above upper lateral line, 7-9 below; 2-18 serrations above opercular notch, 0-11 serrations within notch, 2-20 serrations below, 6-20 subopercular serrations, 0-9 interopercular serrations, preopercle entire (Ref. 81650).

Coloration: adults dark brownish grey or grey overall, with up to 9 faint bars on flanks; on caudal peduncle 3-4 of these bars fuse into an oblong stripe, a typical feature of juveniles and young adults, but fading with size; membrane in opercular notch frequently black; pelvic fin always clear and unpaired fins not darkly pigmented; juvenile specimens (up to 40 mm SL) have up to 9 black bars on flanks, each one scale row wide (Ref. 81650).

Ease of Identification

Meristic characteristics of Ctenopoma nigropannosum

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales
Scales in lateral series 29 - 32
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle
Barbels 0
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal
total 30 - 31

Fins

Dorsal fin(s)

Attributes
Fins number 1
Finlets No. Dorsal   0
Ventral  0
Spines total 17 - 21
Soft-rays total 9 - 13
Adipose fin absent

Caudal fin

Attributes

Anal fin(s)

Fins number 1
Spines total 8 - 10
Soft-rays total 9 - 13

Paired fins

Pectoral Attributes  
Spines     0
Soft-rays   12 - 15
Pelvics Attributes  
Position    
Spines     
Soft-rays   
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Comments & Corrections
Back to Search
cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17