Morphology Data of Parotocinclus jacksoni
Identification keys
Main Ref. Ramos, T.P.A., S.Y. Lustosa-Costa, L.F. Barros-Neto and J.E.L. Barbosa, 2021
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral
Cross section oval
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales

This species is distinguished from all its congeners, except from P. bahiensis, P. cesarpintoi, P. jumbo, P. nandae, P. spilosoma, by having its abdomen covered by few small and dispersed platelets (vs. abdomen entirely covered by large plates in adult individuals or lacking plates in that region); differs from P. bahiensis, P. jumbo by having the pectoral girdle laterally exposed and supporting odontodes, except for a small area over symphysis (vs. lateral portion of pectoral girdle entirely covered by odontodes in P. bahiensis and pectoral girdle covered by thick skin medially and exposed only laterally supporting odontodes in P. jumbo); differs from P. cesarpintoi by the absence of irregular golden lines on head and body (vs. presence of irregular golden lines vermiform on head and body); differs from P. nandae by the presence of lower lip not elongated, falling distinctly short of pectoral girdle (vs. elongated posteriorly, reaching to or surpassing the anterior margin of cleithrumin); differs from P. spilosoma by the larger number of premaxillary and dentary teeth 20-26 and 19-23, respectively (vs. 9-16 and 8-16, respectively), by the presence caudal peduncle ellipsoid in cross-section (vs. flat in cross-section) and by colour pattern, dark body without lighter dots (vs. dark body with lighter dots); differs from P. cearensis mainly by the presence of completely exposed coracoid (vs. exposed only on the sides) and by having the abdomen covered by few small and dispersed platelets (vs. abdomen almost naked with a single row of elongate reduced plates on each side and a group of small, rounded plates irregularly distributed in the preanal region) (Ref. 124638).

Ease of Identification

Meristic characteristics of Parotocinclus jacksoni

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
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb


Dorsal fin(s)

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

Caudal fin


Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  
Pelvics Attributes  
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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