Morphology Data of Neolebias ansorgii
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
Remarks

Descriptive characteristics of juvenile and adult

Striking features none
Body shape lateral fusiform / normal
Cross section
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: body depth 3.1-3.8x and head length 3.1-3.8x SL; snout length comprised from 4.5-4.7x in head length; eye diameter comprised from 3-3.5x in head length (Ref. 86396). Laterosensory canal on lateral surface of head limited to arch of pores around ventral and posterior margins of orbit and associated with preopercle; maxilla with 6 or more teeth; 6th infraorbital (dermosphenotic) absent; dark pigmentation along lateral surface of body approximately 4 scales high (Ref. 81638). Dark vertical bar at base of caudal fin (Ref. 81638, 86396). 11-13 (Ref. 81638) or 10-12 (Ref. 86396) total dorsal fin rays.

Description: snout rounded (Ref. 86396). Body relatively robust, more so anteriorly, depth 0.30-0.33 SL; head profile moderately acute anteriorly (Ref. 81638). Caudal peduncle 1.3-1.5x head length; maxilla reaching to below anterior eye margin (Ref. 86396). Each jaw with 2 rows of teeth, outer row teeth bicuspid (Ref. 81638, 86396), inner row conical (Ref. 86396). Premaxilla with 6-7 teeth along anterior margin, dentary with 8 teeth in outer series; adipose fin typically absent; body scales ctenoid and of moderate size; 9 scales in transverse series between origin of drosal fin and mid-ventral line (excluding median scales); D: II-III,9-10; A: II-III,7-9 (Ref. 81638). Lateral line incomplete, with pores on only anterior 3-5 scales (Ref. 81638, 86396). No scaly process at pelvic-fin bases (Ref. 2936, 86396).

Coloration: ground color tan to brown, lighter ventrally; head darker dorsally and on opercle, with dark band on lips and snout anterior to orbit; dark humeral spot posterodorsal to opercle (Ref. 81638). Humeral spot followed by lightly pigmented area and then broad dusky mid-lateral band about 4 scales high that extends almost to end of caudal peduncle (Ref. 81638, 86396). Mid-lateral band often darker to much darker anteriorly (Ref. 81638). Base of caudal fin with vertically elongate, dark bar (Ref. 81638, 86396), slightly separated by unpigmented area from mid-lateral band on body (Ref. 81638). Distal portions of anal fin darker; other fins with rays outlined with small dark chromatophores, but otherwise unmarked (Ref. 81638). In life sides golden, lateral band with greenish reflections and fins reddish (Ref. 86396).

Ease of Identification

Meristic characteristics of Neolebias ansorgii

Lateral Lines 1 Interrupted: No
Scales on lateral line 31 - 34
Pored lateral line scales 3 - 5
Scales in lateral series
Scale rows above lateral line 9 - 9
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 10 - 13
Adipose fin absent

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 9 - 12

Paired fins

Pectoral Attributes  more or less normal
Spines     
Soft-rays   
Pelvics Attributes  more or less normal
Position    abdominal  before origin of D1
Spines     
Soft-rays   
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