Morphology Data of Thryssa setirostris
Identification keys
Abnormalities
Main Ref. Whitehead, P.J.P., G.J. Nelson and T. Wongratana, 1988
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs no special organs
Different appearance males alike females
Different colors males alike females
Remarks

Descriptive characteristics of juvenile and adult

Striking features striking type of mouth
Body shape lateral fusiform / normal
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 cycloid scales
Diagnosis

Diagnosis: Body fairly compressed, belly with 16-18 plus 9-10, with a total of 25-28 keeled scutes; lower gill rakers 10-12; head with gold tints; anal and caudal fins deep yellow; a black area behind upper part of gill opening (Ref. 189). It is distinguished from all other Thryssa species and in fact all other anchovies by the very long maxilla, reaching at least to tip of pectoral fin, usually to pelvic fin base or even to anal fin origin; also unique is the high coronoid process of the lower jaw, the jaw rising steeply in the mouth (Ref. 189).

Description: Body fairly compressed (Ref. 189). Maxilla very long, reaching at least to tip of pectoral fin (Ref. 189, 2871, 30573). Lower gillrakers on first arch 10 to 12, upper gillrakers 6; branchiostegal rays 10 (Ref. 189, 5430, 30573). Dorsal fin with 3 unbranched and 11-13 branched rays; anal fin with 3 unbranched and 29-36 branched rays; pectoral fin with 1 unbranched and 11-13 branched rays; pelvic fin with 1 unbranched and 6-7 branched rays (Ref. 5430, 122607). Scales on the lateral line 41-46 (Ref. 5430). Scutes present before and behind the pelvic-fin base; 16-18 pre-pelvic scutes and 8-10 post-pelvic scutes (Ref. 189, 5430, 30573, 122607).

Colouration: Head with gold tints; anal and caudal fins deep yellow; a black area behind upper part of gill opening (Ref. 189).

Ease of Identification

Meristic characteristics of Thryssa setirostris

Lateral Lines Interrupted: No
Scales on lateral line 41 - 46
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle
Barbels 0
Gill clefts (sharks/rays only)
Gill rakers
on lower limb 10 - 12
on upper limb 6 - 6
total
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number 1
Finlets No. Dorsal   
Ventral  
Spines total 0 - 0
Soft-rays total 14 - 16
Adipose fin absent

Caudal fin

Attributes forked; more or less normal

Anal fin(s)

Fins number 1
Spines total 0 - 0
Soft-rays total 32 - 39

Paired fins

Pectoral Attributes  more or less normal
Spines     0
Soft-rays   12 - 14
Pelvics Attributes  more or less normal
Position    abdominal  before origin of D1
Spines     0
Soft-rays   7 - 8
Main Ref. (e.g. 9948)
Glossary ( e.g. cephalopods )
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