Morphology Data of Spectrolebias brousseaui
Identification keys
Abnormalities
Main Ref. Nielsen, D.T.B., 2013
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 compressed
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

This species differs from its congeners by having a unique color pattern of males: anterior third of body light brown, posterior two-thirds of body dark blue, almost black dorsal region, with rows of bright blue spots, relatively large size, with about half the diameter of the pupil. It differs from all its congeners, except S. filamentosus, by having pelvic-fin bases separated by an interspaced (vs. pelvic-fin bases in contact), tip of dorsal and anal fins in males with long filamentous rays (vs. absence of filaments, or presents only on dorsal fin in S. semiocellatus and S. inaequipinnatus, or presents only on anal fin in S. chacoensis), and presence (vs. absence) of contact organs on scales of flank in males (Ref. 93219).

Description: Males of S. brousseaui differs from S. filamentosus in color pattern (the latter has an overall reddish color pattern with white spots); having urogenital papillae developed in males and females (vs. poorly developed), and by the longer dorsal-fin base 33.8-36.2% SL (vs. 29.0-31.1%), longer head 27.5-28.8% SL (vs. 25.8-26.7%), lower head 88.6-91.4% HL (vs. 96.2-107.6% ), narrower head 55.6-54.6% SL (vs. 63.4-70.7%), greater number of dorsal-fin rays, 21-22 (vs.16-19), and fewer scales in transverse series 8-9 (vs. 11-12).

Females of S. brousseaui differs from that of S. filamentosus by having lower body, 30.6-33.3% SL (vs. 34.7-36.8%); lower caudal peduncle, 11.9-12.6% SL (vs. 13.0-15.0%); shorter anal-fin base 21.9-27.8% SL (vs. 28.8-31.4%); longer head 29.2-30.6% HL (vs. 27.3-28.7%); lower head 78.1-91.6% HL (vs. 93.4-107.2%); smaller head width, 53.0-59.6% HL (vs. 62.7-64.6%); smaller eye diameter, 29.5-32.3% SL (vs. 33.6-34.9%); fewer scales in the longitudinal series of scales, 23-24 (vs. 27-29); fewer scales in the transverse series of scales, 10 (vs. 12) (Ref. 93219).

Ease of Identification

Meristic characteristics of Spectrolebias brousseaui

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 )
Entered by Capuli, Estelita Emily
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