Morphology Data of Istigobius spence
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 always different morphology between mature adults
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral fusiform / normal
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

Pectoral fin rays entire. Predorsal cycloid scale 7-10, ctenoid on trunk. Few spots on nape; a dusky line running from eye dorsal to sensory pore path, ending at or before pectoral fin base; wavy brown lines on the snout. Pelvic and distal part of anal fins darker in males than in females. Appressed anal fin reaching within a distance of 1-2 scales of caudal fin in male, 2-4 scales in female; appressed 2nd dorsal slightly overlapping caudal in male. Some males exhibit 3-4 vertical bars on abdomen and 2-3 horizontal bars in 1st dorsal fin (Ref. 420); longitudinal scale series 30-32; no scales on cheek and opercle; body depth 4.9-6.1 in SL (Ref. 90102).

Ease of Identification

Meristic characteristics of Istigobius spence

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales
Scales in lateral series 30 - 32
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   0 - 0
Ventral  0 - 0
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   17 - 20
Pelvics Attributes  joint, cup-like
Position    thoracic  before origin of D1
Spines     1
Soft-rays   5 - 5
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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