Morphology Summary - Polymixia melanostoma
Morphology Data of Polymixia melanostoma
Identification keys
Abnormalities
Main Ref. Fan, Y.-C., Y. Su, C.-H. Lin, C.-W. Chang and H.-C. Lin, 2024
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  (shape guide)
Cross section compressed
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

This species is distinguished from its congeners by the following set of characters: D IV-V,35-37; gill rakers on the outer face of first gill arch 3+1+6=10; scales row between dorsal-fin origin and lateral line vertically 6-8 and posteriorly 12-14; pyloric caeca 40; snout is rounded, with the surface rough and gelatinous, its tip evidently protrude anterior margin of premaxilla; ctenii on body scales arranged in wedge shape, forming three rows; fourth anal-fin spine long, 1.0-1.2 in eye diameter; dorsal-fin is long, 49.6-53.0% SL; oral-branchial cavity, not including the underside of tongue, black (Ref. 132970).

Ease of Identification

Meristic characteristics of Polymixia melanostoma

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 10 - 10
Vertebrae
preanal 12 - 12
total 29 - 29

Fins

Dorsal fin(s)

Attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total 4 - 5
Soft-rays total 35 - 37
Adipose fin

Caudal fin  (shape guide)

Attributes

Anal fin(s)

Fins number
Spines total 4 - 4
Soft-rays total 14 - 16

Paired fins

Pectoral Attributes  
Spines     0
Soft-rays   17 - 17
Pelvics Attributes  
Position    
Spines     
Soft-rays   6 - 6
(e.g. 9948)
(e.g. oophagy)
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