Morphology Data of Congothrissa gossei
Identification keys
Abnormalities
Main Ref. Whitehead, P.J.P., 1985
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs no special organs
Different appearance males alike females
Different colors males alike females
Remarks

Descriptive characteristics of juvenile and adult

Striking features none
Body shape lateral fusiform / normal
Cross section compressed
Dorsal head profile more or less straight
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth terminal
Type of scales cycloid scales
Diagnosis

Diagnosis: Small, fairly slender fishes, depth around 22-24% of standard length (Ref. 188). Belly rounded, smooth, no trace of scutes before or behind pelvic fins; pelvic scute itself present, however, the tips of its lateral arms bifurcated (Ref. 188). Jaws about equal, with fine teeth; no second supra-maxilla; lower gillrakers 10 to 12 (Ref. 188). Congothrissa gossei occurs with other clupeid species, but the smoothly rounded belly, absence of spiny post-pelvic scutes and lack of a second supra-maxilla makes it unmistakable (Ref. 188).

Description: Jaws about equal; lower jaw not prominent, even a bit shorter but never longer than upper jaw (Ref. 188, 105003). Dorsal fin with 14-16 rays of which 3 unbranched rays; anal fin with 15-17 rays of which 2 unbranched rays; pectoral fin with 1 unbranched and 10-11 branched rays; pelvic fin insertion just behind dorsal fin origin, with 1 unbranched and 6-7 branched fin rays; caudal fin with 19 rays (Ref. 188, 105003). Scales large; about 20-22 scales in lateral series; 5-6 scales in transverse series (Ref. 188, 105003).

Colouration: body pale yellow, probably silvery coloured for life specimens (Ref. 105003). In preserved specimens: a trail of chromatophores is present in the middle of the flanks, especially on caudal peduncle; also dorsal side of head with fine chromatophores (Ref. 105003).

Ease of Identification

Meristic characteristics of Congothrissa gossei

Lateral Lines Interrupted: No
Scales on lateral line 20 - 22
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 10 - 12
on upper limb
total
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total 0 - 0
Soft-rays total 14 - 16
Adipose fin absent

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 15 - 17

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   11 - 12
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Spines     0
Soft-rays   7 - 8
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Binohlan, Crispina B.
Modified by Boden, Gert
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