Morphology Data of Neoplecostomus jaguari
Identification keys
Abnormalities
Main Ref. Andrade, B.N. and F. Langeani, 2014
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance always different morphology between mature adults
Different colors
Remarks Males differ from females by the following characters: conspicuous urogenital papilla immediately posterior to anus (vs. absent in females); dermal flap on dorsal surface of the unbranched thick ray and branched pelvic-fin rays, less developed in branched rays (vs. absent in females); 14-20 teeth in the premaxilla and 13-18 in the dentary (vs. 30-39 and 30-38 in females); smaller mandibullary width 11.8-15.7% (vs. 18.5-21.6% of the head length in females); and shorter and robust teetn (longer and thin in females).

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

Neoplecostomus jaguari is distinguished from all congeners by having a conspicuous sexual dimorphism: females with 30-38 teeth in the dentary and 30-39 in the premaxilla, and males with 13-18 and 14- 20 teeth respectively (vs. number of teeth in the premaxilla and dentary equivalent in all other species, except for N. langeanii in the premaxilla); females with larger mandibulary width, 18.5- 21.6% HL, males 11.8-15.7% HL (vs. females and males with mandibulary width /head length equivalent in the other species); females with teeth longer and thin, males with teeth shorter and robust (vs. teeth similar in males and females in all other species, except for N. langeanii in the premaxilla). It further differs from all other species from the upper rio ParanĂ¡ basin by having a lateronasal plate either forming the lateral border of the nostril or posteriorly displaced (vs. lateronasal plate absent). In addition, it can be diagnosed from other congeners by having four to six plates between the frontal and prefrontal, here called posteronasal plates (vs. one to three in all other species) (Ref. 97853).

Description: Dorsal-fin rays ii,7; anal-fin rays i,5; pectoral-fin rays i,6; pelvic-fin rays i,5 (Ref. 97853).

Ease of Identification

Meristic characteristics of Neoplecostomus jaguari

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 1
Finlets No. Dorsal   
Ventral  
Spines total
Soft-rays total 9 - 9
Adipose fin absent

Caudal fin

Attributes

Anal fin(s)

Fins number
Spines total
Soft-rays total 6 - 6

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   7 - 7
Pelvics Attributes  
Position    abdominal  before origin of D1
Spines     
Soft-rays   6 - 6
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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