Morphology Data of Zaireichthys rotundiceps
Identification keys
Main Ref. Eccles, D.H., D. Tweddle and P.H. Skelton, 2011
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors

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 Zaireichthys lacustris and Z. maravensis in possessing a premaxillary tooth patch that is less than 40% of the mouth width; it has shorter barbels than Z. wamiensis, maxillary barbel 0.9-1.3 in head length vs. 0.7-0.9; and it is distinguished from Z. compactus by higher number of branched pectoral-fin rays, 7 vs. 6 (Ref. 86935).

Description: Lateral line moderate, ending over middle or anterior part of anal fin base (Ref. 86935). Head broad and depressed; snout blunt; eye moderate; mouth narrow; barbels relatively short (Ref. 86935). Dorsal fin II,5-6; caudal fin slightly emarginate, with the lower lobe a little longer than the upper, the upper and lower lobes each with 7 or 8 branched rays; anal fin with 11-13 rays, the first 3-4 simple; pectoral fins with 7 branched rays (Ref. 86935). Premaxillary tooth patch narrow, less than 40% of mouth width, sub-rectangular; humeral process of cleithrum extending to between level of end of supraoccipital process and base of dorsal fin; branchiostegal rays 6-7 (Ref. 86935).

Colouration: Preserved: generally yellowish brown with a series of about nine faint dark blotches along centre of flank and traces of additional series above and below (Ref. 86935).

Ease of Identification

Meristic characteristics of Zaireichthys rotundiceps

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
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 35 - 38


Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Spines total 2 - 2
Soft-rays total 5 - 6
Adipose fin present

Caudal fin

Attributes more or less truncate

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 11 - 13

Paired fins

Pectoral Attributes  more or less normal
Spines     1
Soft-rays   7 - 7
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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