Morphology Data of Sicyopterus aiensis
Identification keys
Abnormalities
Main Ref. Keith, P., G. Marquet, C. Lord, D. Kalfatak and E. Vigneux, 2011
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance always different morphology between mature adults
Different colors always different colors between mature adults
Remarks The sexual dimorphism is well developed. Males have longer unpaired fins, a more bulbous snout, a distinctive orange russet lateral band below the second dorsal fin and along the upper half of the caudal peduncle extending close to the base of the caudal fin. Females have brownish body, head and fins and the belly is white. The caudal fin is whitish or greyish. The anal fin has a whitish or bluish distal margin (Ref. 87781).

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral fusiform / normal
Cross section circular
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

There are two dorsal fins. The first one has 6 spiny rays and the second one has one spiny ray and 11 soft ones. The anal fin has one spiny ray and 10 soft ones and is located directly opposite to the second dorsal fin. The caudal fin has 13 to 14 branched rays and the posterior margin is rounded. The pelvic disk has one spine and 5 branched rays on each side, the fifth rays are joined together on their entire length. There is a strong frenum between the spines and the disc adheres to the belly between all 5 rays. The pectoral fin usually has 21 to 22 rays and its posterior margin is rounded. There are 62 to 69 scales in lateral series; the scales are ctenoid on the flanks and on the caudal peduncle; 20 (18-23) scales in transverse backward series; 24 (22-29) scales in transverse forward series; 24-33 predorsal scales and 17-19 (16-21) scales in zigzag series. The upper lip has midlateral inverted V-shaped clefts on each side (Ref. 87781).

Ease of Identification

Meristic characteristics of Sicyopterus aiensis

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

Fins

Dorsal fin(s)

Attributes
Fins number 2
Finlets No. Dorsal   
Ventral  
Spines total 7
Soft-rays total 11
Adipose fin

Caudal fin

Attributes

Anal fin(s)

Fins number 1
Spines total 1
Soft-rays total 10

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   
Pelvics Attributes  part of sucker-disc
Position    
Spines     
Soft-rays   
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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