Morphology Data of Trichomycterus maculosus
Identification keys
Abnormalities
Main Ref. Barbosa, M.A. and W.J.E.M. Costa, 2010
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
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

Closely related to Trichomycterus itatiayae, Trichomycterus nigroauratus and

Trichomycterus diabolus, and can be diagnosed from all its congeners from southeastern Brazil by having a broad metapterygoid. Distinguished from these three species by having 45-52 interopercular odontodes; differs from Trichomycterus itatiayae and Trichomycterus diabolus by having seven branchiostegal rays, and 17 to 18 opercular odontodes. Differs further from Trichomycterus itatiayae by the possession of eight pectoral-fin rays, ten anal-fin rays, origin of anal fin in the vertical through the posterior portion of the dorsal-fin base, opercular and interopercular odontodes conical, caudal-fin subtruncate, and color pattern with dark gray row of blotches horizontally elongated along lateral midline of body; from Trichomycterus nigroauratus by having more slender head (head depth 34.9-44.5% of head length vs. 44.8-50.8%), narrower caudal peduncle (caudal peduncle width 1.8-2.4% SL vs. 2.4-3.3%), color pattern showing a dark gray row of blotches horizontally elongated along lateral midline of body and by the absence of golden stripes on the flank; from Trichomycterus diabolus by having caudal fin subtruncate, absence of osseous articulation between metapterygoid and quadrate, presence of filament on pectoral fin and absence of unpigmented zone on proximal region of caudal fin (Ref. 86272).

Ease of Identification

Meristic characteristics of Trichomycterus maculosus

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 36 - 37

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total
Soft-rays total 11 - 12
Adipose fin absent

Caudal fin

Attributes more or less truncate

Anal fin(s)

Fins number
Spines total
Soft-rays total 10 - 10

Paired fins

Pectoral Attributes  more or less normal
Spines     
Soft-rays   8 - 8
Pelvics Attributes  more or less normal
Position    abdominal  before origin of D1
Spines     
Soft-rays   5 - 5
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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