";} } ?> Morphology Summary - Ectrepopterus uruguayensis
Morphology Data of Ectrepopterus uruguayensis
Identification keys
Main Ref. Malabarba, L.R., V.A. Bertaco, F.R. Carvalho and T.O. Litz, 2012
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks Mature males with small bony hooks on all rayed fins (vs. absent in females); pectoral-fin tip reaching pelvic-fin origin in males but not in females; pelvic-fin tip surpass anal-fin origin in males but not in females; males with nearly straight anal-fin (vs. smoothly concave in females). Gill glands were not found on first gill arch on both mature males and females (Ref. 89798).

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral short and / or deep
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth terminal
Type of scales cycloid scales

Can be diagnosed by the following apomorphies: foramen in posterior region of metapterygoid forms an incomplete arch, bordered posteriorly by the hyomandibula; pectoral-fin rays bearing hooks; posterior margin of second infraorbital posteroventrally oblique and second infraorbital ventrally bordering anterior region of third infraorbital; fourth infraorbital more developed longitudinally than dorsoventrally; ascending process of premaxilla reaching just anterior end of nasal; and lateral line interrupted. Further distinguished from several characids by having 6-11 maxillary teeth and longitudinal, wavy stripes laterally on body in larger specimens (Ref. 89798).

Description: Anal-fin rays iii-v,19-26; 4-6 scale rows between lateral line and pelvic-fin origin; 32-36 longitudinal scale series including pored scales (Ref. 89798).

Ease of Identification

Meristic characteristics of Ectrepopterus uruguayensis

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales 5 - 9
Scales in lateral series
Scale rows above lateral line 6 - 7
Scale rows below lateral line
Scales around caudal peduncle 14 - 14
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 9 - 11
on upper limb 5 - 6
preanal 16 - 17
total 33 - 34


Dorsal fin(s)

Attributes no striking attributes
Fins number
Finlets No. Dorsal   
Spines total
Soft-rays total 10 - 12
Adipose fin present

Caudal fin

Attributes forked

Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  more or less normal
Soft-rays   11 - 13
Pelvics Attributes  more or less normal
Position    abdominal  before origin of D1
Soft-rays   7 - 8
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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