Morphology Data of Squalus albicaudus
Identification keys
Abnormalities
Main Ref. de F. Viana, S.T., M.R. De Carvalho and U.L. Gomes, 2016
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 elongated
Cross section angular
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales placoid scales
Diagnosis

This species can be distinguished from its congeners by the following set of characters: caudal fin with a mostly white ventral caudal lobe, its dorsal margin white at midline, and postventral margins broadly white; posterior margin of pectoral-fin broadly white; first dorsal fin with anterior margin also conspicuously white on its anterior half; differs from all species of the S. mitsukurii group with its short snout (vs. large), pectoral-fin free rear tips pointed (vs. rounded), dermal denticles lanceolate and unicuspid (vs. rhomboid and tricuspid); differs from S. cubensis by having a snout strongly pointed (vs. somewhat rounded), second dorsal-fin spine not reaching second dorsal-fin apex (vs. spine reaching second dorsal-fin apex), first dorsal fin with dark apex, but not as a black blotch (vs. distinct black blotch on both dorsal fins), pectoral fins with posterior margin broadly white (vs. narrowly white), in external morphometrics (Squalus albicaudus has a shorter first dorsal fin, anterior margin length 10.9%, 9.7%-11.2% TL vs. 11.6%, 11.6%-12.7% TL, shorter second dorsal fin, anterior margin length 9.2%, 8.8%-10.8% TL vs. 12.3%, 11.2%-11.6% TL, inner margin length 5.0%, 4.1%-5.2% TL vs. 5.6%, 5.5%-6.0% TL, more slender second dorsal-fin spine, width at base 0.9%, 0.6%-0.9% TL vs. 1.0%, 1.0%-1.2%, and clasper much more elongated, inner margin length 7.1%, 6.9%-7.7% TL vs. 8.0%, 3.3%-3.8% TL (Ref. 109601).

Ease of Identification

Meristic characteristics of Squalus albicaudus

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
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal 81 - 89
total 110 - 116

Fins

Dorsal fin(s)

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

Caudal fin

Attributes

Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   
Pelvics Attributes  
Position    
Spines     
Soft-rays   
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Capuli, Estelita Emily
Modified by Bailly, Nicolas
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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