Morphology Data of Raiamas nigeriensis
Identification keys
Abnormalities
Main Ref. De Weirdt, D., A. Getahun, S. Tshibwabwa and G.G. Teugels, 2007
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs no special organs
Different appearance males alike females
Different colors males alike females
Remarks

Descriptive characteristics of juvenile and adult

Striking features none
Body shape lateral elongated
Cross section compressed
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 sub-terminal/inferior
Type of scales cycloid scales
Diagnosis

Diagnosis: body depth 3.5-5.3x and head length 4.2-5.1x SL; eye diameter 2.8-3.5x head length (Ref. 2940, 81282). Scale formula: 7.5-8.5/41-46/(3.5)4.5(5.5); 14 scales around caudal peduncle; 8 dorsal-fin branched rays; 13-15 anal-fin branched rays (Ref. 2940, 81282, 81639).

Description: mouth terminal, without barbels; scales with divergent striae; 2 scales between lateral line and pelvic fin base; dorsal fin falciform, originating in advance of anal fin; caudal fin forked (Ref. 81639). D: III,8; A: III,13-15; P: 15-16; V: I,8 (Ref. 81282, 81639).

Coloration: silvery, with greenish-grey back in life; sides with 8-10 dark vertical bars, longer on posterior part of body; anal, dorsal and caudal fins tinged with orange-red (Ref. 2940, 81282, 81639).

Ease of Identification

Meristic characteristics of Raiamas nigeriensis

Lateral Lines 1 Interrupted: No
Scales on lateral line 41 - 46
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 7 - 9
Scale rows below lateral line 3 - 6
Scales around caudal peduncle 14 - 14
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 0 - 0
Soft-rays total 11 - 11
Adipose fin absent

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 16 - 18

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   15 - 16
Pelvics Attributes  more or less normal
Position    abdominal  before origin of D1
Spines     0
Soft-rays   9 - 9
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