Morphology Data of Nannaethiops unitaeniatus
Identification keys
Abnormalities
Main Ref. Vari, R.P., 2007
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs no special organs
Different appearance
Different colors always different colors between mature adults
Remarks Dorsal and caudal fins suffused with red, more so in males (Ref. 81638).

Descriptive characteristics of juvenile and adult

Striking features none
Body shape lateral fusiform / normal
Cross section compressed
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 ctenoid scales
Diagnosis

Diagnosis: distinguished from Neolebias by its always complete lateral line; caudal peduncle 1-1.5x longer that high (Ref. 2936, 86396). 32-36 scales in a longitudinal series (Ref. 81638, 86396). Four, rarely 5, scales between dorsal fin origin and lateral line (Ref. 81638). 11-16 (Ref. 86396) or 12-14 (Ref. 81638) total dorsal fin rays. 10 (Ref. 86396) or 9-11 (Ref. 81638) total anal fin rays.

Description: small elongate fish, body moderately deep, 0.28-0.38 SL and laterally compressed; mouth terminal with two rows of bicuspid teeth in each jaw (Ref. 2936, 81638, 86396). Maxilla extending to the anterior border of eyes (Ref. 2936, 86396). Premaxilla with 11-12 teeth in outer row, maxilla with 2-3 teeth along anterodorsal margin, dentary with 11-12 teeth in outer row; adipose fin present; 4 scales between lateral line and anal fin origin; D: III,9-11; A: II-III,7-8 (Ref. 81638).

Coloration: preserved specimens yellowish tan; dark chromatophores on upper lip, snout and head; field of dark chromatophores extending from behind orbit to rear of opercle, sometimes forming horizontal band continuous with dark mid-lateral band on body; scales dorsal to lateral line with exposed portion of scale dark other than for ctenii and immediately adjoining portion of main body of scale; caudal fin with dark band on middle rays and with scattered dark chromatophores on remainder of fin; anterior rays of dorsal fin with dark chromatophores; chromatophore field denser on distal portions of rays; remainder of dorsal fin and central portions of pelvic and pectoral fins with scattered chromatophores; live specimens with dark mid-lateral band prominent and with dorsal and caudal fins suffused with red, more so in males (Ref. 81638). Back olivaceous-grey, lower parts and belly whitish; dark mid-lateral band from eye to caudal fin, comprising lower thirds of lateral-line scales and two thirds of those in next-lower series; black spot on dorsal-fin tip (Ref. 2936, 86396).

Ease of Identification

Meristic characteristics of Nannaethiops unitaeniatus

Lateral Lines 1 Interrupted: No
Scales on lateral line 32 - 36
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 4 - 5
Scale rows below lateral line
Scales around caudal peduncle
Barbels 0
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total 0 - 0
Soft-rays total 12 - 14
Adipose fin present

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 9 - 11

Paired fins

Pectoral Attributes  more or less normal
Spines     
Soft-rays   
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Spines     
Soft-rays   8 - 9
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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