Morphology Data of Auchenoglanis biscutatus
Identification keys
Main Ref. Risch, L.M., 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 elongated
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Diagnosis

Diagnosis: head broad (width at least 2/3 of length); snout length less than 0.9 times head width; hind margin of adipose fin nearly straight; premaxillary dentition forming (in adults) 2 well separated, kidney-shaped plates; maxillary barbels never black and reaching at least to hind margin of eye; 8-11 (usually 9 or 10) gill rakers on lower limb of first gill arch; palatine membrane bilobed (with a large and a smaller lobe); dorsal margin of cleithral process broad and flat (visible only in adults)(Ref. 57126).

Description: body rather deep (about 4-5 times in standard length); occipital process broad (ratio width/length from 0.9 (juveniles) to 1.3 (adults), rather rounded and contiguous to the concave-edged first nuchal plate; dorsal fin with 2 spines, the first small, the second strong and denticulate; adipose fin high, increasing steeply backwards, its posterior margin rather straight; palatine membrane with a well developed lobe, and sometimes, a smaller lateral lobe; dorsal process of cleithrum flat and broad (visible only in adults); premaxillary dentition forming a small band (twice as long as broad) in juveniles, developing with growth into 2 small, well separated tooth plates, the entire band being 1.4-1.8 times as long as broad; head broad (width 65-75% of length), snout short (50-68% of head length), showing no great differences between juveniles and adults; nasal barbels absent; pelvic fin with 1 unbranched and 5 branched soft rays (Ref. 57126).

Coloration: body in juveniles marbled, with 7 or 9 series of black dots, in adults uniformly brownish; fins also marbled in juveniles, uniform brownish, in adults sometimes with some small, very distinct, black spots (Ref. 57126).

Ease of Identification

Meristic characteristics of Auchenoglanis biscutatus

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 6
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 8 - 11
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 2
Soft-rays total 7
Adipose fin present

Caudal fin

Attributes more or less truncate; more or less normal

Anal fin(s)

Fins number 1
Spines total 0
Soft-rays total 6 - 8

Paired fins

Pectoral Attributes  more or less normal
Spines     1
Soft-rays   9
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Spines     0
Soft-rays   6
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Musschoot, Tobias
Modified by Musschoot, Tobias
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