Morphology Data of Xenocharax spilurus
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 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
Diagnosis

Diagnosis: two rows of teeth in upper jaw and 3 in lower jaw; completely pored lateral line with 63-75 lateral line scales; total of 19-24 rays in dorsal fin and 13-17 rays in anal fin; 13-16 scales between dorsal fin origin and lateral line (Ref. 81638).

Description: body moderately high, depth 0.36-0.42x SL with greater proportional depth in larger specimens; prepelvic region transversely flattened; premaxilla with 2 rows of bicuspid teeth and 14-16 teeth in outer series; maxilla with 4-6 teeth along anterodorsal margin; dentary with 3 tooth rows, outer row of bicuspid teeth along margin of jaw and 2 rows internal to replacement tooth trench; approximately 15-18 teeth in outer row of dentary; adipose fin moderately developed and scaled basally; body scales ctenoid and relatively small; 13-16 scales between dorsal fin origin and lateral line (excluding median scales); 10-11 scales between anal fin origin and lateral line (excluding median scales); D: IV-V,15-19, A: III-IV,10-13; 10, rarely 11, pelvic rays with lateral ray unbranched (Ref. 81638).

Coloration: preserved specimens yellowish to yellow-brown; body with series of dark, vertical, dorsally posteriorly concave bars; bars extend ventrally to approximately lateral line in small to moderate-sized individuals and to level of horizontal through pectoral fin insertion in some larger specimens; dorsal portions of body dark, particularly along predorsal region; dorsal portions of head dark; distinct dark patch on opercle, prominent anteriorly rounded, dark spot on lateral surface of caudal peduncle; posterior border of spot ranges from approximately straight to posteriorly convex; some populations with dark, scale-sized spots on lateral surface of body; contiguous spots sometimes coalesce into larger marks; median fins, particularly dorsal fin, with rays lined with small dark chromatophores and with membranes dusky (Ref. 81638).

Ease of Identification

Meristic characteristics of Xenocharax spilurus

Lateral Lines 1 Interrupted: No
Scales on lateral line 63 - 75
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 13 - 16
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 19 - 24
Adipose fin present

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 13 - 17

Paired fins

Pectoral Attributes  more or less normal
Spines     
Soft-rays   
Pelvics Attributes  more or less normal
Position    abdominal
Spines     0
Soft-rays   10 - 11
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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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