Morphology Data of Squalius illyricus
Identification keys
Main Ref. Kottelat, M. and J. Freyhof, 2007
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors

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

Differs from its congeners in Western Balkans and Adriatic drainages by having the following characters: scales on lateral line 46-54; a broad dark spot on scale pocket and a narrow series of pigments along free margin of each flank scale (indistinct in juveniles); head depth 68-80% HL in individuals over 9 cm SL; posterior margin of anal convex or almost straight; dorsal fin with 8½ branched rays; anal fin with 8-9½ branched rays; eye diameter 18-34% HL in individuals 9-15 cm SL, 16-18% in individuals over 25 cm SL; snout blunt, dorsal profile convex; lower jaw short, length less than depth of operculum; 5th infraorbital bone small or absent; mouth subterminal; and fins yellow to black in life (Ref. 59043).

Ease of Identification

Meristic characteristics of Squalius illyricus

Lateral Lines Interrupted: No
Scales on lateral line 46 - 54
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb


Dorsal fin(s)

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

Caudal fin

Attributes forked

Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  more or less normal
Pelvics Attributes  more or less normal
Position    abdominal  before origin of D1
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Comments & Corrections
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