Morfologiska data för Odaxothrissa ansorgii
Bestämningsnycklar
Abnormalities
Main Ref. Gourène, G. and G.G. Teugels, 2003
Utseende refererar till
Bones in OsteoBase

Könskaraktärer

specialiserade organ no special organs
annat utseende males alike females
andra färger males alike females
Anmärkningar

Karaktäristiska egenskaper hos juveniler och adulter

Särskilt slående egenskaper none
Lateral kroppsform fusiform / normal
Tvärsnitt compressed
Dorsal profil av huvudet more or less straight
Ögontyp more or less normal
Typ av mun/snyte more or less normal
Munnens placering superior
Type of scales cycloid scales
Diagnos

Diagnosis: Body moderate, often deep, its depth 25% of standard length or more; 13-17 pre-pelvic and 8-11 post-pelvic scutes, 1-2 scutes before pectoral fin origin, first pre-pectoral scute longer and more developed than following scutes without ascending arms; lower jaw strongly projecting, with strong canine teeth at symphysis; pre-maxilla with 2-4 strong backward-pointing canine teeth on each side behind outer row of pre-maxillary teeth; lower gillrakers 22-33, shorter than corresponding gill filaments; anal fin with 17-21 rays; silver stripe along flank (Ref. 188, 54749, 81269, 81631). It resembles Odaxothrissa mento, which has fewer gillrakers, 16-19 vs. 22-33; and Pellonula vorax, which lacks canine teeth in the upper jaw and has longer gillrakers, equal in length to gill filaments vs. shorter (Ref. 188, 54749).

Description: Body moderate, often deep; depth 25% of standard length or more (Ref. 188). Caudal peduncle as long as deep (Ref. 1869). Snout as long as eye, which is about 33% of head length, and exceeds the interorbital width (Ref. 1869). Lower jaw strongly projecting; pre-maxilla with 2-4 strong canine teeth on each side; maxillary extending to below centre of eye (Ref. 1869, 54749, 93833). First gill arch with 32-49 gillrakers; 22-33 gillrakers on the lower limb and 10-17 on the upper limb (Ref. 2849, 54749, 81269, 81631). Dorsal fin with 14-18 rays, first ray of dorsal fin placed slightly in front of or above the pelvic insertion; anal fin with 17-21 rays; pectoral fin with 13-16 rays; pelvic fin with 8 rays; caudal fin deeply forked, with pointed lobes (Ref. 188, 1869, 54749, 81269, 81631). Cycloid scales; 40-45 scales in longitudinal series, 16-17 scales in transverse series (Ref. 1869, 54749). With 13-17 pre-pelvic and 8-11 post-pelvic scutes; pre-pectoral scutes present, 1-2 scutes in front of pectoral fin origin, first pre-pectoral scute longer and more developed than following scutes without ascending arms (Ref. 188, 54749, 81269, 81631). Number of vertebrae 44-46; with 23-25 abdominal vertebrae and 18-21 caudal vertebrae (Ref. 2849, 54749, 81269, 81631).

Colouration: Alcohol-preserved specimens are generally a light yellowish-grey, or yellowish-brown; gill cover, longitudinal stripe and ventral region much lighter (Ref. 2849, 54749, 81269, 81631). In life, upper half, with dorsal fin and base of caudal fin pale olive-green; lower half and other fins white; a broad silvery band along each side (Ref. 1869).

Ease of Identification

Meristiska karaktäristika för Odaxothrissa ansorgii

Sidolinjer avbruten: No
Fjäll längs sidolinje
Porbärande fjäll längs sidolinje
Fjäll i lateralserie 40 - 45
Antal rader fjäll ovan sidolinje
Antal rader fjäll under sidolinje
Fjäll runt stjärtfensspole
Skäggtömmar
Gälspringor (endast hos hajar/rockor) absent
Gälräfständer
på undre del av gälbåge 22 - 33
på övre del av gälbåge 10 - 17
totalt 32 - 49
Ryggkotor
preanal
totalt 44 - 46

Fenor

Ryggfena/fenor

Egenskaper no striking attributes
Antal fenor 1
Antal småfenor Dorsal   
Ventral  
Totalt antal hårda fenstrålar 0 - 0
Totalt antal mjuka fenstrålar 14 - 18
Fettfena absent

Stjärtfena

Egenskaper forked; more or less normal

Analfena/fenor

Antal fenor 1
Totalt antal hårda fenstrålar 0 - 0
Totalt antal mjuka fenstrålar 17 - 21

Pariga fenor

Bröstfena Egenskaper  more or less normal
Fenstrålar hårda     0
Fenstrålar mjuka   13 - 16
Bukfenor Egenskaper  more or less normal
Position    abdominal  beneath origin of D1
Fenstrålar hårda     0
Fenstrålar mjuka   8 - 8
Main Ref. (t.ex. 9948)
Ordlista ( t.ex. cephalopods )
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