Morphology Data of Micralestes acutidens
Identification keys
Main Ref. Paugy, D. and S.A. Schaefer, 2007
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs no special organs
Different appearance
Different colors

Descriptive characteristics of juvenile and adult

Striking features none
Body shape lateral fusiform / normal
Cross section oval
Dorsal head profile more or less straight
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth terminal
Type of scales

Diagnosis: inner dentary teeth multicuspid; 14-17 anal fin branched rays; dorsal fin apical tip black; scales of flank without melanophores concentrated along basal margin, pigment diffuse or absent (Ref. 80290).

Description: body moderately slender; body depth 30-33% and head length 24-29% of SL (Ref. 80290). Body height 3-3.5x and head length 3.6-4.2x in SL (Ref. 42032). Mouth terminal, upper lip prominent, depth of lower jaw about 1.5 that of upper jaw (Ref. 80290). Lower jaw projects (Ref. 4967). Premaxilla with 3 teeth in outer row each bearing 7-12 cusps; dentary with 4 teeth in outer row each bearing 9-12 cusps, median cusp prominent, a multicuspidate tooth at symphysis posterior to outer row dentary teeth; lateral line complete, 26-29 tubes, ultimate canal-bearing scale terminal; anal fin with 3 unbranched and 14-17 branched rays (Ref. 80290).

Coloration: black lateral band from posterior opercular margin to caudal fin base (Ref. 42032, 80290), underlain by broad band of silver pigment in life (Ref. 80290). Band width and pigmentation density increase caudad and greatest at vertical through anal fin origin; dorsal fin with dark mark at apical tip involving frist 3-4 branched rays; adipose fin without pigment; caudal fin lobes often brilliant red in life (Ref. 80290). Fins greyish (Ref. 42032).

Ease of Identification

Meristic characteristics of Micralestes acutidens

Lateral Lines 1 Interrupted: No
Scales on lateral line 23 - 28
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 4.5 - 4.5
Scale rows below lateral line
Scales around caudal peduncle 9 - 11
Barbels 0
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 12 - 15
on upper limb


Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 0 - 0
Soft-rays total 10 - 11
Adipose fin present

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 17 - 20

Paired fins

Pectoral Attributes  more or less normal
Pelvics Attributes  more or less normal
Position    abdominal  before origin of D1
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Palomares, Maria Lourdes D.
Modified by Geelhand, Dimitri
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cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17