Morfologiska data för Leurochilus acon
Bestämningsnycklar
Abnormalities
Main Ref. Williams, J.T., 2003
Utseende refererar till
Bones in OsteoBase

Könskaraktärer

specialiserade organ
annat utseende
andra färger
Anmärkningar

Karaktäristiska egenskaper hos juveniler och adulter

Särskilt slående egenskaper
Lateral kroppsform elongated
Tvärsnitt
Dorsal profil av huvudet
Ögontyp
Typ av mun/snyte
Munnens placering
Type of scales
Diagnos

Common amongst Dactyloscopidae: Small, elongate fishes. Head usually broad and deep, body tapering and compressed behind. Eyes on top of head, often protrusible; mouth moderate to large, oblique to vertical; jaw teeth minute, in 2 or more series; no teeth on roof of mouth (vomer and palatines). Opercular opening large, gill membrane free from isthmus; opercles membranous, large, usually overlapping on underside of head, typically fringed above with 2 to 24 fleshy fimbriae. Dorsal fin continuous, with an isolated or semi-isolated anterior finlet, or with 1 to 5 separate anterior rays; dorsal-fin spines 7 to 23; anal-fin spines 2; dorsal and anal fins free or united to caudal fin by fragile membranes; pectoral fins broad-based, usually enlarged in mature males; caudal-fin rays simple or branched; pelvic fins under throat (insertion anterior to pectoral-fin base), with 1 spine and 3 thickened segmented rays; all other rays simple. Head and venter naked, body elsewhere with large cycloid scales (smooth to touch); lateral line high anteriorly, deflecting ventrally behind pectoral fin to continue along middle of side to caudal-fin base where terminal lateral-line scale bears ventrally directed canal. Body coloration, variably pale to strongly pigmented with white, brown, or reddish; some forms with characteristic saddle-like bars crossing back; others plain, mottled, or with indications of lateral stripes. Species distinguished by: dorsal-fin origin on nape; with an isolated or semi-isolated anterior finlet. First preopercular canal not branched, with a single distal pore. Upper lip without fimbriae. Segmented caudal-fin rays usually 11. Arched lateral-line scales 14 to 17 (Ref. 52855).

Ease of Identification

Meristiska karaktäristika för Leurochilus acon

Sidolinjer avbruten: No
Fjäll längs sidolinje
Porbärande fjäll längs sidolinje
Fjäll i lateralserie
Antal rader fjäll ovan sidolinje
Antal rader fjäll under sidolinje
Fjäll runt stjärtfensspole
Skäggtömmar
Gälspringor (endast hos hajar/rockor)
Gälräfständer
på undre del av gälbåge
på övre del av gälbåge
totalt
Ryggkotor
preanal
totalt

Fenor

Ryggfena/fenor

Egenskaper extending over most of the back length
Antal fenor 1
Antal småfenor Dorsal   1 - 1
Ventral  
Totalt antal hårda fenstrålar 7 - 23
Totalt antal mjuka fenstrålar
Fettfena

Stjärtfena

Egenskaper more or less truncate; more or less normal

Analfena/fenor

Antal fenor 1
Totalt antal hårda fenstrålar 2 - 2
Totalt antal mjuka fenstrålar

Pariga fenor

Bröstfena Egenskaper  more or less normal
Fenstrålar hårda     
Fenstrålar mjuka   
Bukfenor Egenskaper  more or less normal
Position    jugular
Fenstrålar hårda     1
Fenstrålar mjuka   3 - 3
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Comments & Corrections
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