Morphology Data of Polycentrus jundia
Identification keys
Main Ref. Coutinho, D.P. and W.B. Wosiacki, 2014
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks Discrete adipose gibbosity between the occipital and coronal region present in males (vs. absent in females).

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales

Polycentrus jundia can be distinguished from P. schomburgkii by the following characters: diagonal upper postorbital band being shorter than orbital diameter (vs. longer); median postorbital horizontal band present (vs. absent); subocular band being shorter than orbital diameter (vs. length of subocular band equal to or greater than orbital diameter; snout blunt (vs. protruding); mouth isognathous (vs. prognathous); serrations absent on lower edge of lacrimal or two tiny serrations at the posterior

end (vs. 8-14 conspicuous serrations distributed throughout the lower edge); posterior edge of vertical arm of preopercle fully serrated (vs. smooth edge); five pungent opercular spines, the three dorsalmost largest (vs. one or two short spines); subopercle widely serrated along most of the edge (vs. no serrations); cleithrum with serrations on posterior dorsal margin (vs. no serrations); interopercle with widely serrated edge (vs. clusters of three to five serrations along the edge of varying position between individuals); fourth pectoral-fin ray reaching vertical through anal-fin origin (vs. reaching vertical from spine III or IV of anal fin); 19-20 scales on dorsal-fin base (vs. 26-31); 12-14 scales on anal-fin base (vs. 16-20); 19-21 predorsal scales (vs. 28-30); and median opercular blotch absent (vs. present) (Ref. 102655).

Ease of Identification

Meristic characteristics of Polycentrus jundia

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales
Scales in lateral series 20 - 24
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle 15 - 16
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
preanal 11 - 11


Dorsal fin(s)

Attributes extending over most of the back length
Fins number 1
Finlets No. Dorsal   
Spines total 15 - 16
Soft-rays total 7 - 9
Adipose fin absent

Caudal fin

Attributes more or less truncate

Anal fin(s)

Fins number
Spines total 11 - 12
Soft-rays total 5 - 6

Paired fins

Pectoral Attributes  
Soft-rays   13 - 16
Pelvics Attributes  
Spines     1
Soft-rays   5 - 5
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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