Morphology Data of Nettorhamphos radula
Identification keys
Abnormalities
Main Ref.
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 oval
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

This species is distinguished by the following characters: unique features of oral jaws, including: an upper jaw which is much wider and longer than the lower jaw, creating a large gap between the outermost teeth of the upper jaw and those of the lower jaw (vs. upper and lower jaws similar in width and length and without obvious gap between outermost teeth of the upper jaw and those of the lower jaw or upper jaw only slightly wider and longer than the lower jaw creating a narrow gap between the outermost teeth of the upper jaw and those of the lower jaw); with tiny dagger-like conical teeth of uniform size arranged in multiple rows in both the upper (premaxilla; ca. 15 rows) and lower jaw (dentary; ca. 10 rows; vs. single row of conical teeth along the upper and lower jaws, a few short, staggered rows of incisiviform and/or conical teeth along both the upper and lower jaw, or conical teeth arranged in a broad patch anteriorly tapering to a single row posteriorly along both the upper and lower jaws); medial face of dentary without an anteromedially directed spine-like process; borad snout, rounded anteriorly, upper lip separated from snout by a shallow groove; adhesive disc double, with papillae present along the entire anterior margin of disc region A; patches of papillae on disc regions C and D; gill openings are large, joined across isthmus; presence of a well-developed spine laterally on head, formed by a heavily ossified subopercle; dorsal and anal fins are widely separated from caudal fin; dorsal fin with fewer fin rays compared to anal fin (Ref. 116784).

Ease of Identification

Meristic characteristics of Nettorhamphos radula

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

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 )
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