Morphology Summary - Neotrygon trigonoides
Morphology Data of Neotrygon trigonoides
Identification keys
Abnormalities
Main Ref. Last, P.R., W.T. White, M.R. de Carvalho, B. Séret, M.F.W. Stehmann and G.J.P. Naylor, 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  (shape guide)
Cross section flattened
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

This species is described by the following: a small stingray with a smooth rhombic disc (usually thorns on nape absent); short tail with both dorsal and ventral folds; upper disc with small blue-edged white ocelli and black speckles; distinct mask-like marking around eyes; sides of tail mottled and tip banded; disc is broad, its width ca,1.3 times its length, trunk fleshy; pectoral-fin

apex abruptly angular; snout is short, bluntly angular, the tip not extended, the anterior margins almost straight to weakly undulate; eyes large, protruding, length of orbit and spiracle, ca. 1.4 in snout length, the interorbital space subequal to orbit length; mouth is very small, with 2 broad central oral papillae, the labial furrows and folds prominent, the jaws asymmetric; nasal curtain skirt-shaped, rather narrow, the margin concave, strongly fringed; nostrils narrow; skin often lacking denticles and thorns; tail firm, broad based and depressed slightly anteriorly, tapering gradually to caudal sting, it is slender, almost rounded below sting, flattened posteriorly (not long and

whip-like), the length slightly longer than DW, with usually 1 caudal sting, its ventral fold low, elongate, base ca.1.5 times distance from snout to 5th gill slit, the dorsal fold short based, lower than ventral fold; pelvic fins are large, the apices rather pointed (Ref. 114953).

Ease of Identification

Meristic characteristics of Neotrygon trigonoides

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
total

Fins

Dorsal fin(s)

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

Caudal fin  (shape guide)

Attributes

Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   
Pelvics Attributes  
Position    
Spines     
Soft-rays   
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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