Morphology Data of Schilbe uranoscopus
Identification keys
Abnormalities
Main Ref. De Vos, L., 2003
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral fusiform / normal
Cross section compressed
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

Diagnosis: 13-16 gill rakers on lower limb of first gill arch; 57-75 branched anal-fin rays; eyes positioned dorso-laterally; adipose fin always absent (Ref. 43912, 57127, 81643). Often with a post-occipital hump, a character also sometimes found in Schilbe intermedius whose head profile is extremely variable (Ref. 57127, 81643). Posterior nostrils closer to each other than are anterior ones; nasal barbel at maximum reaching to midway between eye and opercle, but generally shorter; inner side of pectoral spine feebly serrated (Ref. 43912).

Description: 50-57 vertebrae, 45-52 non-fused vertebrae; 8-10 branchiostegal rays on one side of head; caudal peduncle generally deeper than long, in some cases as long as or slightly longer than deep; nasal barbel reaches at maximum to midway between eye and opercle but in larger specimens it is much shorter and does not even reach beyond orbit; maxillary barbel reaches at least to middle of eye and at maximum to posterior border of opercle; inner mandibular barbel short and reaches at maximum to just beyond orbit; outer mandibular barbels reach at least to midway between eye and opercle and at maximum to posterior border of opercle; in many specimens upper profile of head nearly horizontal and nape ascends very abruptly from occiput to dorsal fin, thereby forming a well-defined hump (Ref. 43912). Schilbe uranoscopus is closely related to S. intermedius from which it can be distinguished by the higher number of gill rakers on the lower part of the anterior arch (13-16 against 7-14 in S. intermedius), the higher number of branched anal fin rays (57-75 versus 41-66 in S. intermedius) and by the supero-lateral position of the eyes (Ref. 43912).

Coloration: Juveniles: sides more or less silvery, head and postcephalic area irregularly mottled (Ref. 43912, 57127, 81643) as well as sides, just behind opercle (Ref. 43912). In adults, head and back, as well as all fin-bases, dark brown; sides yellowish or whitish; anal fin sometimes black-edged (Ref. 43912, 57127, 81643). Dark blotch present behind head, where swimbladder comes close under skin; brown median stripe may be present along caudal peduncle (Ref. 43912).

Ease of Identification

Meristic characteristics of Schilbe uranoscopus

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle
Barbels 8
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 13 - 16
on upper limb 3 - 7
total
Vertebrae
preanal
total 50 - 57

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   0
Ventral  0
Spines total 1
Soft-rays total
Adipose fin absent

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total
Soft-rays total 59 - 73

Paired fins

Pectoral Attributes  more or less normal
Spines     1
Soft-rays   9 - 11
Pelvics Attributes  more or less normal
Position    abdominal  beneath origin of D1
Spines     
Soft-rays   6
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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