Morphology Data of Enteromius stigmatopygus
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 fusiform / normal
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 cycloid scales
Diagnosis

Diagnosis: Mouth terminal; one pair of barbels or none (Ref. 81639). West African specimens usually without barbels, but some adults may have one or two more or less well developed pairs; anterior barbel missing or not reaching to anterior margin of eye; posterior barbel missing or not reaching to anterior margin of eye; last simple dorsal-fin ray smooth on hind margin (Ref. 81282). 2-3 large gill rakers followed by undifferentiated papillate tissue on lower limb of first gill arch (Ref. 81639). Scale formula 3.5-4.5/22-25/2.5-3.5; 1.5 scales between lateral line and pelvic-fin insertions; 9-10 scales around caudal peduncle; lateral line usually incomplete; 8 branched dorsal fin rays (Ref. 81282, 81639). Lateral line deeply depressed below dorsal fin and lateral line scales deeper than other scales; maximum reported size 28 mm standard length; dorsal fin colorless; 3 small black spots aligned along middle of sides, one at end of caudal peduncle, other 2 below origin and below end of dorsal-fin base, respectively (but some of these spots may occasionally be missing) (Ref. 2940, 81282).

Description: Small species; mouth terminal and oblique, its angle located approximately below centre of eye (Ref. 81282, 81639). One pair of barbels or none (Ref. 81639, 122753); development of barbels occurs at late stage in Nile basin (Ref. 50093), where largest specimens may have two pairs of well-developed barbels (Ref. 81282); in West Africa majority of individuals lack barbels, except for some specimens that had been classified in different species (B. gourmanensis and B. karoualensis, which have two pairs of barbels) (Ref. 2940, 81282). Dorsal fin with 3 unbranched and 8 branched rays; anal fin with 3 unbranched and 5 branched rays; pectoral fin with 13 rays; pelvic fin with 8 rays (Ref. 81282, 81639). Scales: 3.5-4.5 scales between lateral line and dorsal fin origin; 2.5-3.5 scales between lateral line and mid-belly; 22-25 scales in lateral line; 1.5 scales between lateral line and pelvic fin insertion (Ref. 81282, 81639).

Colouration: Yellowish-white in life; fine, black longitudinal line and 3 small, rounded spots aligned along middle of sides; 1st before level of first dorsal-fin ray, 2nd below last dorsal-fin ray and 3rd at end of caudal peduncle; small black spots at base of anal fin; spots on flanks may or may not be visible, depending on individuals (Ref. 2940, 81282, 81639).

Ease of Identification

Meristic characteristics of Enteromius stigmatopygus

Lateral Lines 1 Interrupted: No
Scales on lateral line 22 - 25
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 3.5 - 4.5
Scale rows below lateral line 2.5 - 3.5
Scales around caudal peduncle 9 - 10
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 2 - 3
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 8 - 8

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   13 - 13
Pelvics Attributes  more or less normal
Position    abdominal  beneath origin of D1
Spines     0
Soft-rays   8 - 8
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Palomares, Maria Lourdes D.
Modified by Boden, Gert
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