Morphology Data of Kneria angolensis
Identification keys
Abnormalities
Main Ref. Steindachner, F., 1866
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs other
Different appearance
Different colors
Remarks Opercular apparatus only present in (mature) males (Ref. 42110).

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral elongated
Cross section circular
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth sub-terminal/inferior
Type of scales
Diagnosis

Diagnosis: body height less than head length (Ref. 3022), the latter 5.5-6 times in total length (Ref. 1878, 3022). Eye lateral, well visible from below (Ref. 1878), its diameter 3-3.66 times in head length (Ref. 1878, 3022). Dorsal fin origin behind pelvic fins (Ref. 1878, 3022). In males, snout with spine-like tubercles (Ref. 1878, 83772). Ventral profile of lower jaw slightly ventrally curved, except in the middle where it is more or less dorsally curved; more than 100 scales on lateral line; blackish grey band from the back of the head to the caudal fin (Ref. 83772). Lateral line origin curving dorsally above opercular organ, the latter not overlying the anterior lateral line (Ref. 88971). Black spot at base of pelvic and pectoral fins; 2 black spots at base of anal fin (Ref. 3022, 83772). Blackish brown spots just above and below lateral line (Ref. 83772).

Description: mouth with sharp edges, but without lips; scales small and fragile, cycloid; upper half of caudal fin slightly longer than lower half (Ref. 83772). Caudal fin lobes either with rounded tips (Ref. 83772) or pointed (Ref. 1878). Caudal fin base scaled (Ref. 83772).

Coloration: yellowish (Ref. 1878) to dark brown (Ref. 1878, 83772) above, whitish (Ref. 1878) to brownish-yellow (Ref. 83772) below lateral line and on ventral surface. Either a greyish lateral band from back of the head to caudal fin, usually above the lateral line but on the lateral line at the level of the pectoral fins and on the caudal peduncle (Ref. 83772), or a lateral series of black dots (Ref. 1878). Lateral band (if present) widens to form a spot before the caudal fin; blackish brown spots present above and below the lateral line (Ref. 1878). A blackish spot at the base of the pelvic and (Ref. 1878, 83372) and pectoral fins (Ref. 83772), 2 such spots at the anal fin base (Ref. 1878, 83772), and several on the margins of the caudal fin (Ref. 83772).

Remark: the description given by Ref. 1878 is based on two halfgrown specimens.

Ease of Identification

Meristic characteristics of Kneria angolensis

Lateral Lines 1 Interrupted: No
Scales on lateral line 95 - 100
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle
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   0
Ventral  0
Spines total 0
Soft-rays total 9 - 10
Adipose fin absent

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 0
Soft-rays total 11 - 12

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   14
Pelvics Attributes  more or less normal
Position    abdominal  before origin of D1
Spines     0
Soft-rays   9
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Musschoot, Tobias
Modified by Musschoot, Tobias
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