Morphology Data of Helcogramma billi
Identification keys
Abnormalities
Main Ref. Holleman, W., 2007
Appearance refers to Male; Female
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks Live color not known but in alcohol females are paler than males (Ref. 75031).

Descriptive characteristics of juvenile and adult

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

Diagnosis: Dorsal fin III + XIII+ 10-11, second fin twice height of first in males (Comoro Is.); anal fin I + 19-20; pectoral rays 16 (2+7+7); pelvic fin I, 2, spine short and hidden, segmented rays simple, partially united by membrane. Vertebrae 10 + 25-26. LL total lateral scales 38-39, pored series 19-25 (121) scales, terminates at caudal fin base; nape with scales, bases of caudal and anterior of anal fin scaleless. Mandibular pores 2-3+1+2-3. Head length 3.4 in SL; eye 2.8; maxilla 2.2 in HL. Body with 5 H-shaped bars; dorsal, anal and caudal fins pigmented with spots or stripes. Live color not known but in alcohol females and juveniles are paler than males (Ref. 75031).

Ease of Identification

Meristic characteristics of Helcogramma billi

Lateral Lines Interrupted: No
Scales on lateral line 38 - 39
Pored lateral line scales 27 - 33
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 10 - 10
total 35 - 36

Fins

Dorsal fin(s)

Attributes
Fins number 3
Finlets No. Dorsal   
Ventral  
Spines total 16 - 17
Soft-rays total 9 - 11
Adipose fin absent

Caudal fin

Attributes more or less truncate

Anal fin(s)

Fins number 1
Spines total 1 - 1
Soft-rays total 17 - 20

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   16 - 16
Pelvics Attributes  
Position    thoracic
Spines     1
Soft-rays   2 - 2
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