Morphology Data of Ichthyborus besse
Identification keys
Abnormalities
Main Ref. Gosse, J.P., E.J. Coenen and G.G. Teugels, 2003
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs no special organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features striking type of mouth
Body shape lateral elongated
Cross section
Dorsal head profile more or less straight
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth terminal
Type of scales ctenoid scales
Diagnosis

Diagnosis: body depth 4.7-6.2 and head length 3.1-3.8x SL; caudal peduncle 1.5-2x longer than high; head flattened, 2.9-3.5 longer than wide; eye diameter 4-7x of head length; scale formula 12.5-14.5/90-107/13.5-14.5; single, dark, undulating longitudinal band along lateral line (not visible in live specimens); caudal-fin lobes marked with oblong black spots (Chad and Benué) (Ref. 2936, 86396).

Description: pointed snout, slightly shorter than post ocular part; apart from the bicuspid teeth, there are 2 strong canines in upper and 3 in lower jaw; scales ctenoid; 10-12 scales between lateral line and pelvic-fin base (Ref. 2936, 86396).

Coloration: silvery or greyish body sometimes with dark longitudinal band above lateral line; after preservation in formalin this band becomes more distinct; dorsal fin grey or light yellow; caudal fin bright yellow with black oblong spots (Ref. 2916, 86396).

Ease of Identification

Meristic characteristics of Ichthyborus besse

Lateral Lines 1 Interrupted: No
Scales on lateral line 90 - 107
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 12 - 15
Scale rows below lateral line 13 - 15
Scales around caudal peduncle
Barbels 0
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal
total

Fins

Dorsal fin(s)

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

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  more or less normal
Spines     
Soft-rays   
Pelvics Attributes  more or less normal
Position    abdominal  before origin of D1
Spines     
Soft-rays   
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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