Morphology Data of Psilorhynchus chakpiensis
Identification keys
Main Ref. Shangningam, B. and W. Vishwanath, 2013
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth sub-terminal/inferior
Type of scales

This species is a member of the Psilorhynchus balitora species group but it can be diagnosed from other members of the group by possessing longer caudal peduncle 17.8-20.5% SL (vs. 8.9-15.2 in P. balitora, P. brachyrhynchus, P. breviminor, P. nepalensis, P. pavimentatus, P. gokkyi, P. piperatus, P. hamiltoni and P. rahmani). It differs from P. amplicephalus by its smaller eye (24.5-29.2% HL vs. 32.4-36.0) and fewer lateral-line scales (30-31 vs. 32); and from P. breviminor, P. nepalensis, P. rahmani and P. pavimentatus in having a greater head depth (59.4-70.4% HL vs. 51.0-55.8 in P. breviminor, 50.0-56.8 in P. nepalensis, 53.3-59.2 in P. rahmani and 54.5-59.0 in P. pavimentatus). It is distinguished from all congeners by its caudal-fin pattern consisting of two black bars, one incomplete bar near the base of the upper lobe, and a complete bar across the centre of the fin, traversing from the upper to the lower margin of the fin (Ref. 93984).

Ease of Identification

Meristic characteristics of Psilorhynchus chakpiensis

Lateral Lines Interrupted: No
Scales on lateral line 30 - 31
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle 10 - 10
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 33 - 33


Dorsal fin(s)

Attributes no striking attributes
Fins number
Finlets No. Dorsal   
Spines total
Soft-rays total 12 - 12
Adipose fin

Caudal fin

Attributes forked

Anal fin(s)

Fins number
Spines total
Soft-rays total 8 - 8

Paired fins

Pectoral Attributes  more or less normal
Soft-rays   15 - 15
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Soft-rays   9 - 9
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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