Morphology Data of Pterothrissus gissu
Identification keys
Abnormalities
Main Ref. Hidaka, K., Y. Tsukamoto and Y. Iwatsuki, 2017
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features none
Body shape lateral fusiform / normal
Cross section oval
Dorsal head profile clearly convex
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth sub-terminal/inferior
Type of scales
Diagnosis

This species is distinguished by the following set of characters (holotype measurements in parentheses): supraneural bones 6-7; dorsal-fin rays 54-65 (mode 58); total vertebrae 105-107 (107); pored lateral-line scales 99-109 (105); pre-dorsal scale rows 13-20 (16); head length 23-31 % (mean 27 %) of SL; pectoral-fin length 10-18 % (15 %) of SL; pre-dorsal-fin length 31-39 % (35 %) of SL; dorsal-fin base length 47-56 % (52 %) of SL; postorbital length 9-12 % (10 %) of SL; upper caudal-fin length 16-32 % (21 %) of SL (Ref. 109573).

Ease of Identification

Meristic characteristics of Pterothrissus gissu

Lateral Lines Interrupted: No
Scales on lateral line 107 - 113
Pored lateral line scales 99 - 109
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle
Barbels 0
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 16 - 16
Vertebrae
preanal
total 105 - 107

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   0 - 0
Ventral  0 - 0
Spines total 0 - 0
Soft-rays total 54 - 65
Adipose fin absent

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 10 - 13

Paired fins

Pectoral Attributes  more or less normal
Spines     
Soft-rays   13 - 18
Pelvics Attributes  more or less normal
Position    abdominal  behind origin of D1
Spines     
Soft-rays   9 - 11
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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