Morphology Data of Rasbora tobana
Identification keys
Abnormalities
Main Ref. Lumbantobing, D.N., 2010
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors always different colors between mature adults
Remarks Females have larger and deeper body than males. Males can be further distinguished externally by a row of antrorse tubercles on the anterodorsal surface of the pectoral-fin rays and by the pointed cephalic tubercles, which are absent in females; nuptial males have a hypertrophied region of the interradial membrane on the portion proximal to the tuberculate pectoral-fin rays, which is more opaque than its adjacent non-hypertrophied region.

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 cycloid scales
Diagnosis

Distinguished from all members of the Rasbora trifasciata-group by the following characters: a black midlateral stripe extending along the flank from the post-opercular region to the caudal-fin base and tapering anteriorly and terminating posteriorly at the black basicaudal spot as wide as the black stripe; male cephalic tubercles relatively slender and tall with the tubercle base relatively higher than the skin surface and appearing protruded with the epithelial cells smooth, and with the tubercles aggregated in a clumped plate; and a relatively large supraorbital with posterior margin almost reaching anterior lamina of fifth infraorbital and exceeding opening of dilatator fossa (vs. small supraorbital with posterior margin distantly separated from anterior lamina of fifth infraorbital and barely reaching opening of dilatator fossa). Can be further diagnosed from other members of this group in northwestern Sumatra by the following combination of characters: cranial superficial neuromasts (with basal plate of the neuromast confluent with the skin surface and surrounded by a peripheral groove); a conspicuous depression on the ventral margin of the maxilla notched by a deep lachrymal groove; the uniformly pigmented lachrymal region; the dorsomedial branch of the supraorbital canal extending toward the posterior margin of the frontal; the axial streak anteriorly terminating in the area between the vertical through the dorsal-fin origin and the pelvic-fin insertion; the presence of cephalic tubercles in both sexes; a transverse scale count anterior to the dorsal-fin origin and pelvic-fin insertion of K4/1/3K; 10 scales around ccaudal peduncle; a basal reticulation pattern comprised of networks of well-developed parenthesis-shaped bars on the midlateral surface of the body; the maximum vertical coverage of basal reticulation of three longitudinal scale rows; and the pelvic-fin rays i,7 (Ref. 85846).

Description: Dorsal-fin rays ii, 7½; anal-fin rays ii, 5½; pectoral-fin rays i,13; pelvic-fin rays i, 7; basicaudal blotch relatively distinct; gill rakers on 1st gill arch 10-11; all scales perforated, 26-29 + 2-3; scales in lateral line series 27-30 + 2-3; black basicaudal spot on caudal-fin base; all fins hyaline except for slight yellow coloration on basal sections of dorsal- and caudal-fin rays (Ref. 94947).

Ease of Identification

Meristic characteristics of Rasbora tobana

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales 26 - 29
Scales in lateral series 27 - 30
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle 10 - 12
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total 10 - 11
Vertebrae
preanal
total 31 - 32

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total
Soft-rays total 9 - 9
Adipose fin absent

Caudal fin

Attributes forked

Anal fin(s)

Fins number
Spines total
Soft-rays total 7 - 7

Paired fins

Pectoral Attributes  more or less normal
Spines     
Soft-rays   14 - 14
Pelvics Attributes  more or less normal
Position    abdominal  before origin of D1
Spines     
Soft-rays   8 - 8
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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