Morphology Data of Amphilius longirostris
Identification keys
Main Ref. Skelton, P.H., 2007
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
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth sub-terminal/inferior
Type of scales

Diagnosis: caudal fin with 7+8 principal rays; caudal peduncle 1.6-2 times longer than deep; snout longer than post-orbit length; eyes placed distinctly nearer to hind margin of head than to tip of snout (Ref. 81646).

Description: body stout, depressed anteriorly, tapered posteriorly; head 3.6-4.6 times in SL, depressed, flat above and below, anterior edge obtusely blunt; mouth subterminal; lips fleshy; teeth caniniform, in deep narrow patch on premaxillary and band on maxillary; maxillary barbels shorter than head length; snout long, 0.6-0.65% HL; nostrils in mid-snout; eyes small, relatively closely spaced, interorbital width 1.3-2.5 times orbit diameter, confluent with head (no free orbital margins); large sexually mature males develop swollen snouts (pre-orbital region); caudal peduncle relatively long, 5.3-6.5 times in SL, and slender, depth 1.6-2.3 times in length; fins well-developed; dorsal fin with 1 unbranched and 6 branched rays, rectangular with straight edges, leading ray forms entire leading edge; pectoral fins with 1 unbranched and 8-9 branched rays, fan-like with padded pectinate leading ray, not reaching pelvics; pelvic fins with 1 unbranched and 5 branched rays, entirely posterior to dorsal, not reaching anal base, leading ray padded and pectinate; anal fin with 2-3 unbranched and 5-7 branched rays, short, not reaching caudal, with 2-3 unbranched rays and 5-7 branched rays; caudal fin shallowly forked or emarginate, lobes of equal size, fin base covered with fleshy pad; adipose fin short and rounded (ellipsoid), above anal; anus adjacent to genital pore, positioned nearer to pelvic fins than to anal base (Ref. 81646).

Coloration: mottled with grey-black spots and vermiculated marks over dorsal and lateral surfaces; 5 lighter dorsal saddles from behind head to base of adipose fin, the light areas partly filled with brown markings; fin rays brown with darker bands; caudal with dark base, a medial band and a distal band; ventral surface from head to anus light brown or cream (Ref. 81646).

Ease of Identification

Meristic characteristics of Amphilius longirostris

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
on upper limb


Dorsal fin(s)

Fins number 1
Finlets No. Dorsal   0
Ventral  0
Spines total 0
Soft-rays total 7
Adipose fin present

Caudal fin


Anal fin(s)

Fins number 1
Spines total 0
Soft-rays total

Paired fins

Pectoral Attributes  
Spines     0
Soft-rays   9 - 10
Pelvics Attributes  
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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