Morphology Summary - Phenacoscorpius trispinis
Morphology Data of Phenacoscorpius trispinis
Identification keys
Abnormalities
Main Ref. Matsumoto, T. and H. Motomura, 2025
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral  (shape guide) short and / or deep
Cross section compressed
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

This species is distinguished from its congeners by the following set of characters: 16-17 pectoral-fin rays, middle rays branched; 4 pored lateral-line scales; 6 upper gill rakers, 14 lower gill rakers (10 and 4 on ceratobranchial and hypobranchial, respectively), 20 total gill rakers; slit behind last gill arch absent; palatine teeth absent; anterodorsal and lateral lacrimal spines present; second preopercular spine smaller than third or fourth spines; nuchal and parietal spines distinct; head length 45.2% of SL; body depth 38.1% of SL; head width 17.2% of SL; snout length 11.2% of SL; maxillary depth 7.6% of SL; postorbital length 21.2% of SL; first dorsal-fin spine length 6.8% of SL; second dorsal-fin spine length 13.6% of SL; pelvic-fin spine length 19.9% of SL; longest pelvic-fin ray 23.2% of SL; longest pectoral-fin ray 39.0% of SL; caudal-fin length 25.3% of SL; caudal peduncle length 17.2% of SL (Ref. 132491).

Ease of Identification

Meristic characteristics of Phenacoscorpius trispinis

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales 2 - 4
Scales in lateral series
Scale rows above lateral line 6 - 6
Scale rows below lateral line
Scales around caudal peduncle
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 13 - 16
on upper limb 5 - 7
total 19 - 22
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes
Fins number
Finlets No. Dorsal   
Ventral  
Spines total 12 - 12
Soft-rays total 8 - 9
Adipose fin

Caudal fin  (shape guide)

Attributes

Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   16 - 18
Pelvics Attributes  
Position    
Spines     
Soft-rays   
(e.g. 9948)
(e.g. oophagy)
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