Morphology Data of Spectracanthicus tocantinensis
Identification keys
Abnormalities
Main Ref. Chamon, C.C. and L.H. Rapp Py-Daniel, 2014
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 fusiform / normal
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales bony plates or armour
Diagnosis

This species can be distinguished from all Spectracanthicus species by theinfraorbital 4 forming most of the posterior edge of the orbit (vs. forming a minute portion of orbital rim) and by having large basipterigium fenestrae (vs. medium or small-sized basipterigium fenestrae). It further differs from S. immaculatus and S. zuanoni by its color pattern, consisting of small, yellowish dots, and by having thick teeth (vs. dots lacking in S. immaculatus and large, white spots in S. zuanoni; and slender teeth). It can be further diagnosed from S. zuanoni by having 8-16 dentary teeth (vs.19-43); from S. murinus by having bar-shaped, eversible opercle with conspicuous odontodes (vs. triangle shaped opercle not eversible, without conspicuous odontodes) and by having four unbranched anal-fin rays (vs. three unbranched anal-fin rays); and from S. punctatissimus by the slightly pointed snout in dorsal view (vs. snout rounded in dorsal view) (Ref. 95496).

Description: Dorsal-fin rays i,7; anal-fin rays i,4; pelvic-fin rays i,5; dorsal-fin base very long, its length equivalent to 12 dorsal plates, reaching pre-adipose plate and connected to adipose fin by thick membrane; dorsal-fin spinelet V-shaped with locking mechanism (Ref. 95496).

Ease of Identification

Meristic characteristics of Spectracanthicus tocantinensis

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 8 - 12
total 26 - 26

Fins

Dorsal fin(s)

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

Caudal fin

Attributes more or less truncate

Anal fin(s)

Fins number
Spines total
Soft-rays total 5 - 5

Paired fins

Pectoral Attributes  
Spines     1
Soft-rays   6 - 6
Pelvics Attributes  
Position    abdominal
Spines     
Soft-rays   6 - 6
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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