Morphology Summary - Knodus ytuanama
Morphology Data of Knodus ytuanama
Identification keys
Abnormalities
Main Ref. Ferreira, K.M. and W.M. Ohara, 2023
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  (shape guide) fusiform / normal
Cross section compressed
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

This species is distinguished from its congeners by the following set of characters: interradial membranes of the caudal fin thickened, forming folds between the branched rays of the upper and lower lobes; absence of a humeral blotch; presence of a dark, wide midlateral stripe extending along the sides of body from the posterior region of opercle to the middle caudal-fin rays; lateral line complete; absence of a dark blotch on the basis of the first five branched dorsal-fin rays; absence of two symmetric, large dark blotches basally on caudal fin lobes absence of lateral line interrupted many times; absence of midlateral stripe extending to lower lobe of caudal fin; a smaller eye, 28.3-35.0% HL; anal-fin length short, 21.4-24.9% SL; and the absence of a modified glandular tissue on the anal-fin lobe in mature males (Ref. 128404).

Ease of Identification

Meristic characteristics of Knodus ytuanama

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
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal
total 37 - 37

Fins

Dorsal fin(s)

Attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total
Soft-rays total 8 - 8
Adipose fin present

Caudal fin  (shape guide)

Attributes

Anal fin(s)

Fins number 1
Spines total
Soft-rays total 15 - 19

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   10 - 12
Pelvics Attributes  
Position    
Spines     
Soft-rays   7 - 7
(e.g. 9948)
(e.g. oophagy)
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