Morphology Data of Pygidianops cuao
Identification keys
Abnormalities
Main Ref. Schaefer, S.A., F. Provenzano, M. de Pinna and J.N. Baskin, 2005
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
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

Diagnosed from its congeners by having diminutive eyes, posterior naris absent, presence of a triangular skin flap at mouth corner, dorsal and ventral fin fold deep and extending forward on the head to a vertical through tip of pectoral fin. Differs from Pygidianops magoi by

the presence of six laterosensory pores on head, presence of pectoral and anal fins, presence of 12-13 caudal fin rays associated with the caudal plate (Ref. 56682).

Ease of Identification

Meristic characteristics of Pygidianops cuao

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
total
Vertebrae
preanal
total 41 - 41

Fins

Dorsal fin(s)

Attributes greatly reduced or absent
Fins number
Finlets No. Dorsal   
Ventral  
Spines total 0 - 0
Soft-rays total 0 - 0
Adipose fin absent

Caudal fin

Attributes more or less truncate

Anal fin(s)

Fins number
Spines total 0 - 0
Soft-rays total 4 - 5

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   1 - 1
Pelvics Attributes  suppressed/absent
Position    absent
Spines     0
Soft-rays   0 - 0
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