Morphology Data of Psilorhynchus ngathanu
Identification keys
Main Ref. Shangningam, B. and W. Vishwanath, 2014
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 elongated
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth sub-terminal/inferior
Type of scales

Distinguished from its congeners in having a combination of the following characters: midventral region between pectoral fins scaleless; two rows of spots on dorsal-fin rays present; two black bars on caudal fin present, one complete in middle and another incomplete just posterior to caudal-fin base; lateral line with squarish to rectangular black patches, anterior patches obscured by the background pigmentation, patches decrease in size posteriorly; pectoral fin with v-vi unbranched rays; caudal fin with 10 + 9 principal rays; and lateral line with 32-33 (Ref. 95115).

Description: Dorsal fin iii.9 rays; anal fin ii.6; pectoral fin v (4, including holotype) or vi (11).10; pelvic fin ii.7; caudal fin emarginate (Ref. 95115).

Ease of Identification

Meristic characteristics of Psilorhynchus ngathanu

Lateral Lines Interrupted: No
Scales on lateral line 32 - 33
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 24 - 35


Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Spines total
Soft-rays total 12 - 12
Adipose fin absent

Caudal fin

Attributes more or less truncate

Anal fin(s)

Fins number
Spines total
Soft-rays total 8 - 8

Paired fins

Pectoral Attributes  more or less normal
Soft-rays   15 - 16
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 )
Entered by Torres, Armi G.
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