Morphology Data of Glossogobius bellendenensis
Identification keys
Abnormalities
Main Ref. Hoese, D.F. and G.R. Allen, 2009
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 fusiform / normal
Cross section
Dorsal head profile
Type of eyes
Type of mouth/snout
Position of mouth
Type of scales
Diagnosis

Mental fraenum bilobed, with lateral lobes broad and attached to chin, with a posteromedian

attachment sometimes giving the appearance of a third lobe; predorsal area partly scaled, midline scales extending no farther forward than posterior preopercular margin; cheek, operculum, pectoral base, prepelvic area and anterior midline of belly naked; first dorsal fin with one or two large black spots posteriorly; second dorsal-fin rays usually I,10; anal-fin rays I,8; pectoral-fin rays usually 16–17; predorsal scale count 2–14; cheek papilla lines composed of single row of papillae; papilla line 6 absent and vertebrae usually 12+16.Glossogobius bellendenensis is readily distinguished from other species of Glossogobius in dorsal and anal-ray counts, reduced predorsal scale coverage, absence of scales of prepelvic area and pectoral base and distinctive shape of the mental frenum. It shares most of those characteristics with Glossogobius muscorum from the Fly River in New Guinea. Glossogobius bellendensis differs from that species in coloration, in usually having 12+16 vertebrae (versus 11+17), and a trilobed mental frenum (versus bilobed). The coloration differences include lacking a horizontal brown stripe on the cheek below the eye, an oval brown spot on the anteromedian margin of the operculum and white on the posterior end of lips, characteristic of G. muscorum. It addition there are two large spots on the midside on the belly (versus one large blotch on the side of the belly).

The species can be confused with Glossogobius concavifrons, which has scales on the pectoral base and prepelvic area, predorsal scales reaching to near eye, more numerous precaudal vertebrae (13–15) and more compressed head. Currently the two species are not known to be sympatric. Glossogobius concavifrons is known from rivers of western Cape York to Arnhem Land in Australia and southern New Guinea. Separation of juveniles below 20 mm SL is difficult because the scales are not well developed in Glossogobius concavifrons at that size.

Ease of Identification

Meristic characteristics of Glossogobius bellendenensis

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 1
Spines total 1 - 1
Soft-rays total 8 - 8

Paired fins

Pectoral Attributes  
Spines     
Soft-rays   16 - 17
Pelvics Attributes  
Position    
Spines     
Soft-rays   
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
Entered by Busson, Frédéric
Modified by Valdestamon, Roxanne Rei
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