Morphology Data of Syacium guineense
Identification keys
Main Ref. Murakami, T. and K. Amaoka, 1992
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 short and / or deep
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales

11-12 pectoral fin rays on ocular side, 10 on blind side. Preserved specimens uniformly brownish on ocular side, yellowish-white on blind side; fins paler than body (dorsal and anal fins with regular series of dark blotches); pectoral fin on ocular side with dark bars; caudal fin with scattered indistinct dark blotches (Ref. 10878). Exhibits sexual dimorphism, mature males with greater interorbital width compared to females and the upper one or two pectoral fin rays on the ocular side are extended and filamentous (Ref. 10878).

Ease of Identification

Meristic characteristics of Syacium guineense

Lateral Lines Interrupted: No
Scales on lateral line 50 - 60
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 7 - 9
on upper limb 2 - 3
total 34 - 36


Dorsal fin(s)

Fins number 1
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 0 - 0
Soft-rays total 84 - 93
Adipose fin absent

Caudal fin


Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 62 - 73

Paired fins

Pectoral Attributes  
Spines     0
Soft-rays   10 - 12
Pelvics Attributes  
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Garilao, Cristina V.
Modified by Froese, Rainer
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