Morphology Data of Protocobitis polylepis
Identification keys
Main Ref. Zhu, Y., Y.-J. Lü, J.-X. Yang and S. Zhang, 2008
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks Males differ from females by having slightly elongated and slightly more thickened first and second branched rays of the pectoral fin (Ref. 78524).

Descriptive characteristics of juvenile and adult

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

Differs from the known species, Protocobitis typhlops, by having the following characters: presence of light black pigmentation; body covered by rudimental scales except for head and abdomen; head length 24.1%-24.8% of SL; body depth 16.2%-16.3% of SL; inner rostral barbel length 19.8%-21.0% of head length; outer rostral barbel length 28.6%-30.2% of head length; maxillary barbel length 44.6%-46.0% of head length (Ref. 78524).

Ease of Identification

Meristic characteristics of Protocobitis polylepis

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 6
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 8 - 8


Dorsal fin(s)

Fins number 1
Finlets No. Dorsal   
Spines total 2 - 2
Soft-rays total 6 - 7
Adipose fin absent

Caudal fin

Attributes more or less truncate

Anal fin(s)

Fins number
Spines total 2 - 2
Soft-rays total 5 - 5

Paired fins

Pectoral Attributes  
Spines     1
Soft-rays   7 - 7
Pelvics Attributes  
Position    abdominal  behind origin of D1
Spines     1
Soft-rays   4 - 4
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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