Morphology Data of Parakneria fortuita
Identification keys
Abnormalities
Main Ref. Penrith, M.J., 1973
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 circular
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth sub-terminal/inferior
Type of scales
Diagnosis

Diagnosis: elongate, small species, body depth 6.4-8.0 times in SL; body width 8.2-10.0 times in SL; head rather short, 4.9-5.5 times in SL, about twice as long as broad (Ref. 86888). Head smooth, round in front, flat below (Ref. 52193). Eye laterodorsal (Ref. 86888), about 4.1-5 times in HL, 0.9-1.3 times in interorbital distance and 1.6-2.1 times in snout length (Ref. 89112), its horizontal diameter slightly less than interorbital distance; snout length equal to postorbital distance; interorbital distance about equal to mouth width; jaws without teeth, but with horny edges to jaws (Ref. 86888). Mouth straight, tadpole-like; gill openings form a slit above pectoral fins (Ref. 52193). Dorsal fin origin very slightly anterior to pelvic fin origin, slightly posterior to midpoint of SL (Ref. 86888), nearer to origin of caudal fin than to snout (Ref. 52193). Anal fin well posterior (Ref. 86888), closer to caudal fin origin than pelvic fin origin (Ref. 52193, 86888). Anal fin membrane relatively thick; pectoral fin large and ventral, its length 0.9 times in HL, 6.0 times in SL; pelvic fin 1.3 times in pectoral, 8.1 times in SL; strip of belly between pectoral and pelvic fins appears naked but has fine transparent scales; top, bottom and sides of head naked (Ref. 86888).

Description: caudal fin with 19 full rays; lower lobe of caudal fin slightly larger than upper; scales small; 26+17 vertebrae, including hypural; caudal fin skeleton simple, epural elements of approximately equal size (Ref. 86888).

Coloration: basic ground color pale yellow-brown fading to off-white after preservation; degree of dark markings on body dependant on size; small specimens have dark line of undulating thickness down side over lateral line, ending in dark triangular blotch on caudal base and 2 diagonal stripes on caudal; faint mottling dorsally; with increase in size lateral stripe becomes broader and more pronounced, and dorsal markings become prominent; small dark marks may or may not appear at base of paired fins; diagonal stripes on caudal very marked (Ref. 86888).

Ease of Identification

Meristic characteristics of Parakneria fortuita

Lateral Lines 1 Interrupted: No
Scales on lateral line 100
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal
total 43

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   0
Ventral  0
Spines total 0
Soft-rays total 11
Adipose fin absent

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 0
Soft-rays total 8

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   15 - 16
Pelvics Attributes  more or less normal
Position    abdominal  beneath origin of D1
Spines     0
Soft-rays   10
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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