Morphology Data of Istigobius rigilius
Identification keys
Abnormalities
Main Ref. Murdy, E.O. and D.F. Hoese, 1985
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs protruding genital papilla (m)
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral elongated
Cross section circular
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 cycloid and ctenoid scales
Diagnosis

Upper pectoral fin rays entire. Predorsal with 7-9 cycloid scales; trunk with ctenoid scales. Segmented and non branching caudal rays 4, branching 13. Body color yellowish white; 2 brown diagonal lines from preoperculum to upper jaw, connected by a single line; 2 almost vertical brown lines on operculum. 4th spine of 1st dorsal fin longest. No sharp distinction between sexes in pigmentation and elongation of 2nd dorsal, pelvic and anal fins. Males sometimes with 3-4 dusky vertical bars on abdomen (Ref. 420); fully united pelvic fins with well-developed frenum; longitudinal scale series 29-32; predorsal scales 7-9, reaching interorbital space; absence of scales on cheek or opercle; depth of body 4.7-6.1 in SL (Ref. 90102).

Ease of Identification

Meristic characteristics of Istigobius rigilius

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 0
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal 10 - 10
total 26 - 26

Fins

Dorsal fin(s)

Attributes other
Fins number 2
Finlets No. Dorsal   
Ventral  
Spines total 7 - 7
Soft-rays total 10 - 11
Adipose fin absent

Caudal fin

Attributes more or less truncate; more or less normal

Anal fin(s)

Fins number 1
Spines total 1 - 1
Soft-rays total 9 - 10

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   15 - 19
Pelvics Attributes  joint, cup-like
Position    thoracic  before origin of D1
Spines     1
Soft-rays   5 - 5
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Capuli, Estelita Emily
Modified by Valdestamon, Roxanne Rei
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cfm script by eagbayani, 17.10.00, php script by rolavides, 13/03/08 ,  last modified by sortiz, 06.27.17