Morphology Data of Chrysichthys thysi
Identification keys
Main Ref. Geerinckx, T., L. Risch, E.J. Vreven, D. Adriaens and G.G. Teugels, 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
Type of scales

Diagnosis: snout length larger than 75% of mouth width; dorsal spine long, 17.2-22.9% HL, less than 6 times in SL; dorsal fin base length 21.3-31.5% HL; 13-15 soft rays in anal fin (Ref. 81642).

Description: premaxillary toothband wide (width 33.2-45.2% HL), mouth wider (width 42.33-55.6% HL) than snout length (30.7-42.9% HL); vomerine and palatine dentition strongly developed, even in juveniles; pectoral fin with 9 (rarely

10) soft rays; anal fin with 13-15 soft

rays, 4-5 unbranched, 8-10 branched; nasal barbel long (length 16.2-36.5% HL)(Ref. 81642).

Coloration: preserved specimens: head and dorsum dark brown, ventrum creamy white (Ref. 81642).

Ease of Identification

Meristic characteristics of Chrysichthys thysi

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 8
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 10 - 14
on upper limb 6 - 9


Dorsal fin(s)

Fins number 1
Finlets No. Dorsal   
Spines total 2 - 2
Soft-rays total 6 - 6
Adipose fin present

Caudal fin

Attributes forked

Anal fin(s)

Fins number 1
Spines total
Soft-rays total 13 - 15

Paired fins

Pectoral Attributes  
Spines     1
Soft-rays   9 - 10
Pelvics Attributes  
Position    abdominal
Spines     1
Soft-rays   5 - 5
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Musschoot, Tobias
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cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17