Morphology Data of Luciobarbus yahyaouii
Identification keys
Main Ref. Doadrio, I., M. Casal-Lopez and S. Perea, 2016
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks Males exhibit nuptial tubercles in the preorbital space (Ref. 114135).

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral elongated
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales

Diagnosis: This species differs from other species of Luciobarbus by the following combination of characters: 42-45 scales on the lateral line, 8-9 above lateral line and 5-6 below lateral line; insertion of the ventral fin is placed in the same edge of the dorsal fin origin; the last single fin ray is ossified in two/thirds of its length, deeply serrated with teeth in the middle part longer than the width of the ray; barbels long, the first barbel overpasses the preorbital distance while in other species it does not reach the preorbital distance, the second barbel usually has the same length than the postorbital distance while in other species it does not reach the postorbital distance; the ethmoid bone is wider than its length; the dorsal branch of the pharyngeal bone is long and forms an open angle with respect to the inferior branch; vertebrae 41-43; and gill rakers 14-17 (Ref. 114135).

Description: The body is elongated in relation to maximum body depth with body depth 22-28% of standard length; the head is short with respect to the body with head length 22-24% of standard length; infraorbital bones are narrow (Ref. 114135). The first barbel reaches the rim of the ey and in several specimens it is extended to half the width of the eye; the second barbel usually extends beyond the posterior rim of the eye, usually reaching the preopercle; the anterior barbel is 22-48% and the second 36-62% of head length (Ref. 114135). the lips are thick and exhibit a well-developed medial lobe; the lacrymal bone has a medium-sized has a medium-sied manubrium; the snout is prominent, but less marked than in Luciobarbus maghrebensis and L. rifensis, with preorbital length 6-9% of standard length; the iris is yellowish pigmented at the superior border but less conspicuously than in L. ksibi (Ref. 114135). The profile of the dorsal fin is straight, with the last single ray ossified in two-thirds of its length and deeply serrated; dorsal fin with 4 unbranched rays and 8 branched rays; anal fin with 3 unbranched and 5 branched rays; pectoral fin with 1 unbranched and 15-16 branched rays; ventral fin with 1 unbranched and 8 branched rays; the pectoral and ventral fins are longer in males, and the anal fin is longer in females; ventral fins are inserted on the edge of the dorsal fin insertion; the caudal fin is 19.8-26.7% of standard length; caudal fin with 18 rays (Ref. 114135). Number of scales on the lateral line 42-45; 8-9 scales above lateral line; 5-6 scales below lateral line (Ref. 114135). The caudal peduncle is less deep than in other Luciobarbus species, with the exception of L. ksibi and the body least depth is 10-12.8% of standard length; the height of the caudal peduncle is 1.5-1.9 times the length of the anal peduncle (Ref. 114135). The skull is wide with a wide ethmoid bone; the pharyngeal bone has a long dorsal process; the lacrimal bone is well developed, and infraorbital bones are wide; the dentary and the maxilla have long anterior processes; the basioccipital plate is small and triangular; vertebrae 41-43 (Ref. 114135). Pharyngeal teeth in adults 4.3.2/4.3.2 (Ref. 114135). Number of gill rakers 14-17 (Ref. 114135).

Colouration: The colouration is silver or silver-yellowish in fins; some specimens exhibit a mid-flank dark stripe; juveniles present blotches, as in the other Luciobarbus species (Ref. 114135).

Ease of Identification

Meristic characteristics of Luciobarbus yahyaouii

Lateral Lines Interrupted: No
Scales on lateral line 42 - 45
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 8 - 9
Scale rows below lateral line 5 - 6
Scales around caudal peduncle
Barbels 4
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 14 - 17
total 41 - 43


Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Spines total 0 - 0
Soft-rays total 12 - 12
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   16 - 17
Pelvics Attributes  more or less normal
Position    abdominal  beneath origin of D1
Spines     0
Soft-rays   9 - 9
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Boden, Gert
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cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17