Morphology Data of Hapalogenys merguiensis
Identification keys
Abnormalities
Main Ref. Iwatsuki, Y., U. Satapoomin and K. Amaoka, 2000
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 short and / or deep
Cross section compressed
Dorsal head profile
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth sub-terminal/inferior
Type of scales ctenoid scales
Diagnosis

Head and body generally dark brownish when fresh. Two indistinct oblique dark bands on body, the first descending from the nape to behind the pectoral fin; the second from base of anterior 2nd or 3rd dorsal fin spines and soft dorsal fin base, curving backward thru the lateral line to soft anal fin and caudal peduncle. Maxillary scales absent. Eye diameter greater than one quarter of the head length. Ten pores on and behind the chin; often with slitlike pores posteriorly. Fleshy lower lip with a cluster of very short dense papillae. At the origin of the dorsal fin is a procumbent spinelike process (exposed tip of first pterygiophore) (Ref. 36944).

Ease of Identification

Meristic characteristics of Hapalogenys merguiensis

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales 39 - 42
Scales in lateral series
Scale rows above lateral line 9 - 10
Scale rows below lateral line 18 - 20
Scales around caudal peduncle
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 12 - 14
on upper limb 5 - 7
total
Vertebrae
preanal
total 24 - 24

Fins

Dorsal fin(s)

Attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total 6 - 6
Soft-rays total 14 - 14
Adipose fin

Caudal fin

Attributes more or less truncate; more or less normal

Anal fin(s)

Fins number 1
Spines total 3 - 3
Soft-rays total 9 - 10

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   17 - 18
Pelvics Attributes  more or less normal
Position    thoracic  behind origin of D1
Spines     
Soft-rays   
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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