Morphology Data of Alionematichthys riukiuensis
Identification keys
Abnormalities
Main Ref. Møller, P.R. and W. Schwarzhans, 2008
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral elongated
Cross section compressed
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

This species is distinguished by the following characters: D 77-92; A 59-72; moderately large eyes (2.5-3.0% SL); moderately slender, massive body, snout with many cirri; cheeks with scales and a large scale patch on opercular spine(6-17), with large specimens having a few scales below opercular spine; with upper preopercular pore; outer pseudoclasper broad-based, not very large, not extending beyond hood in resting position; the inner pseudoclasper is not much smaller than the outer one, equal anterior and posterior lobes, anterior lobe broadly connected to anterior rim of outer pseudoclasper; slender otolith, its length to height 2.2-2.4, with gently curved dorsal rim; otolith length to sulcus length 1.6-1.7, ostium length to caudal length 3.5-4.0; vertebrae 11-12 + 30-32 = 41-44 (Ref. 81230).

Description: Characterized by brownish red to orange brown color; caudal rays 16; body depth at origin of anal fin 16.8-23.4 (mean 19.9) % SL; anterior nostril high on snout, about one-third or less distance from lip to anterior rim of eye (Ref. 90102).

Ease of Identification

Meristic characteristics of Alionematichthys riukiuensis

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 15 - 12
Vertebrae
preanal 11 - 12
total 41 - 44

Fins

Dorsal fin(s)

Attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total 0 - 0
Soft-rays total 77 - 92
Adipose fin

Caudal fin

Attributes

Anal fin(s)

Fins number
Spines total
Soft-rays total 59 - 72

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   21 - 23
Pelvics Attributes  
Position    
Spines     0
Soft-rays   1 - 1
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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