Morphology Data of Glossogobius sentaniensis
Identification keys
Abnormalities
Main Ref. Hoese, D.F. and G.R. Allen, 2015
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features none
Body shape lateral elongated
Cross section compressed
Dorsal head profile more or less straight
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth terminal
Type of scales
Diagnosis

Diagnosis: preoperculum without a spine; mental fraenum indistinct, covered by sensory papillae; mouth large; reaching to below a point between anterior pupil and mideye; jaws forming an angle of 30-35° with body axis; upper margin of upper jaw in line with mideye; cheeks tapering; interorbital narrow, much less than eye; predorsal area scaled forward to eyes; cheek naked; operculum patch of scales dorsally; pectoral base covered by small scales; prepelvic area largely covered with embedded scales, sometimes with thin naked area anteriorly; belly fully scaled; 1st dorsal fin with spines 2-6 extending beyond other spines when fin depressed; 1st dorsal fin without black spot posteriorly; pelvic fin thin and oval, much longer than wide; reaching just short of anus; 2nd dorsal rays I,9; anal rays I,8; pectoral rays usually 19; longitudinal scale count 31-35; predorsal scale count 23-31; transverse scale count (TRB) 11.5-12.5; gill rakers on outer face of 1st arch 1+1+6-9; lower gill rakers on outer face of 2nd arch 8-9; branched caudal rays 13-14, usually 14; vertebrae 11+16=27(4*); papillae: line 1 (before nasal pore) composed of 2 rows of papillae posteriorly, 1 anteriorly; line 2 (between nasal pores) composed of single row of papillae, continuous across snout; line 5 (suborbital) composed of single row of papillae joining line 7 below anterior margin of eye; line 6 (suborbital branch) absent; lines 7, 9, 10 (LL cheek rows) each composed of single row of papillae, reaching to posterior end of preoperculum; line 8 and 11 (LT row) reaching to near end of preoperculum; line 12 (Outer POP-mandibular) composed of single row of papillae, with an arch at posterior end of jaws and continuous with papillae line posteriorly; line 13 (Inner POP-mandibular) composed of 2 or 3 rows of papillae; line 20 (opercular VT) composed of single row of papillae, with multiple branches ventrally; line 21 (Upper opercular OT) composed of single row of papillae, line gently curved; line 22 (Lower opercular OT) short and composed of single row of papillae, with several ventral branches; several vertical papillae rows on belly; a single curved line anteriorly on most body scales (often obscure dorsally and posteriorly) (Ref. 103536).

Description: based on 31 specimens 34-144 mm SL; 1st dorsal spines 6(24*); gill rakers on outer face of 1st arch 1+6(1), 1+1+7(6), 1+1+8(5), 1+1+9(3); segmented caudal rays 9/8(16*); vertebrae 11+16(4); branched caudal rays 6/6(4), 7/6(3), 7/7(15*), 8/7(1); counts of other meristic characters given in Tables 1-5; head depressed, length 33.2-36.9% SL, width 16.8-18.3% SL, depth 14.7-16.4% SL; snout long pointed in dorsal view, concave, with notch before eye in side view; 9.8-12.4-% SL; eye about 1.2-2.4 in snout, 7-8.3% SL in specimens less than 100 mm SL and 4.9-7.1% SL in specimens over 100 mm SL; small bump below anterior nostril absent; anterior nostril at end of short tube, 1-2 nostril diameters above upper lip; posterior nostril a large

pore, from eye and 1-2 anterior nostril diameters from anterior nostril and midway between upper lip and eye (young) to slightly closer to upper lip than eye (adult); preoperculum long, distance from end of eye to upper posterior preopercular margin less than snout length; postorbital very long, subequal to distance from tip of snout to posterior end of eye; gill opening reaching to a point midway between posterior margin of eye and posterior preopercular margin; teeth in upper jaw: outer row of teeth conical, slightly enlarged and wideset with smaller teeth in between larger teeth, 3-4 inner rows of smaller depressible, inwardly directed teeth, innermost row larger than middle rows; teeth in lower jaw: teeth in outer row conical, slightly enlarged and wide-set anteriorly, 3-4 inner rows of smaller depressible teeth, teeth in innermost row larger than teeth in middle rows; tongue tip bilobed; gill rakers on outer face of 1st arch long and slender, 1/3 to 1/4 filament length; rakers on inner face of 1st arch and other arches short and denticulate; body covered mostly with large ctenoid scales, cycloid on midpredorsal region, pectoral base, prepelvic area, operculum and belly; 1st dorsal fin triangular shaped, origin well behind pelvic insertion; 2nd dorsal fin subequal to 1st dorsal fin in height; anal fin slightly lower than dorsal fins; pectoral fin with rounded margin, reaching to above anus; pelvic disc thin, much longer than wide, reaching just short of anus; 5th ray with 8-14 terminal tips; head pores; nasal pore directly above posterior nostril, rarely with extra pore adjacent to nasal pore (often on 1 side only); anterior interorbital pore present posterior interorbital pore present (single or paired); a single postorbital pore behind eye; infraorbital pore below postorbital present; lateral canal pore above preoperculum present; lateral canal pore above posterior preopercular margin absent; terminal lateral canal pore above operculum present; short tube above operculum, with pore at each end present; 3 preopercular pores, upper in line with lower margin of pupil; middle pore midway between other pores (Ref. 103536).

Coloration in alcohol: head and body dark brown, ventral surfaces light brown; a dark brown bar from anteroventral margin of eye to middle of upper jaw; posterior end of jaws light brown; a small brown spot behind eye; a short dark brown oblique bar from posteroventral margin of eye extending across cheek about half way to posterior preopercular margin; operculum with a large brown blotch anteriorly; a large brown spot (slightly larger than eye length behind upper pectoral base; a series of very large (greater than half body depth) elliptical dark brown spots on midside; 1st spot below 1st dorsal origin, 2nd spot below 2nd dorsal origin, 3rd spot below posterior end of 2nd dorsal fin, 4th on middle of caudal peduncle; small spot at end of caudal peduncle, continuous with large spot on bases of fin rays; back with large brown blotches and saddles, between and dorsal to midside spots; leading edge of 1st 3 dorsal spines brown; 2nd dorsal fin with small brown spots forming rows; anal, pectoral and pelvic fins clear, without distinct spots; caudal with small black spots forming wavy bands on upper 4/5 of fin, lower 5th of fin grey (Ref. 103536). Coloration in life: head and body tan to light brown with dark brown to blackish markings as described above for preserved specimens; leading edge of both dorsal fins yellow; 2nd dorsal fin with small brown spots forming rows; anal, pectoral and pelvic fins clear, without distinct spots; caudal with small black spots forming 5-6 wavy, most vivid on middle portion of fin (Ref. 103536).

Ease of Identification

Meristic characteristics of Glossogobius sentaniensis

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 27

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 2
Finlets No. Dorsal   
Ventral  
Spines total 7
Soft-rays total 9
Adipose fin absent

Caudal fin

Attributes more or less truncate; more or less normal

Anal fin(s)

Fins number 1
Spines total 1
Soft-rays total 8

Paired fins

Pectoral Attributes  more or less normal
Spines     
Soft-rays   19
Pelvics Attributes  
Position    thoracic  before origin of D1
Spines     
Soft-rays   
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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