Morphology Data of Hypostomus pagei
Identification keys
Abnormalities
Main Ref. Armbruster, J.W., 2003
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

Light, gray brown color with the spots considerably faded or absent. Juveniles have caudal fin darkest along both spines and at the base, clear medially, a color pattern not found in any other members of the Hypostomus cochliodon group. Most similar to H. hondae and H. plecostomoides but differs by the general absence of spots on the caudal fin and/or caudal-fin spines (H. pagei may have very faint spots on the caudal-fin spines; some H. plecostomoides lack spots on the caudal-fin spines, but the spines are almost black instead of light gray-brown) and by having shorter pectoral-fin spine (reaching 0-1 plates beyond pelvic fin when depressed below the pelvic fin vs. 2-3 plates with the exception of one specimen of H. pagei that has pectoral-fin spines reaching two plates beyond the pelvic fin and the one specimen of H. plecostomoides examined from the Lago Valencia drainage that has pectoral-fin spines that do not reach beyond the pelvic fin) (Ref. 50589).

Ease of Identification

Meristic characteristics of Hypostomus pagei

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

Fins

Dorsal fin(s)

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

Caudal fin

Attributes

Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   
Pelvics Attributes  
Position    
Spines     
Soft-rays   
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Comments & Corrections
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