Main Ref. | Skelton, P.H., L.M. Risch and D. Paugy, 2003 |
Utseende refererar till | |
Bones in OsteoBase |
specialiserade organ | |
annat utseende | |
andra färger | |
Anmärkningar |
Särskilt slående egenskaper | |
Lateral kroppsform | elongated |
Tvärsnitt | |
Dorsal profil av huvudet | |
Ögontyp | |
Typ av mun/snyte | |
Munnens placering | |
Type of scales | |
Diagnos |
Diagnosis: dorsal-fin base distinctly ahead of pelvic-fin insertions; distance from head to dorsal fin less than 20% of standard length; interorbital space about 35% of head length; caudal-peduncle long and relatively slender, its length over twice its depth, ; caudal fin forked, with lower lobe distinctly longer than upper lobe; maxillary barbell rather short, less than 60% of head length; snout length about 60% of head length; branchiostegal membrane weakly notched on midventral line (Ref. 57128). Description: short and depressed head ending in a rather long snout; eyes positioned near posterior end of head; mouth subterminal and rather narrow, its width slightly more than half the head width; barbels rather short, maxillary pair reaching to eye; pectoral and pelvic fins broad and well developed; adipose fin short and rounded; a well developed, crenulated fringe at base of caudal fin; 6+7 principal caudal fin rays (Ref. 57128). Coloration: back normally dark brown or black, with up to 5 lighter cross-bars (Ref. 57128). |
Ease of Identification |
Sidolinjer | 1 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 | 6 |
Gälspringor (endast hos hajar/rockor) | |
Gälräfständer | |
på undre del av gälbåge | 3 - 6 |
på övre del av gälbåge | 1 - 2 |
totalt | |
Ryggkotor | |
preanal | |
totalt |
Egenskaper | no striking attributes |
Antal fenor | 1 |
Antal småfenor | Dorsal 0 |
Ventral 0 | |
Totalt antal hårda fenstrålar | 0 |
Totalt antal mjuka fenstrålar | 7 |
Fettfena | present |
Egenskaper | forked; asymmetric |
Antal fenor | 1 |
Totalt antal hårda fenstrålar | 0 |
Totalt antal mjuka fenstrålar | 7 - 8 |
Bröstfena | Egenskaper more or less normal |
Fenstrålar hårda 0 | |
Fenstrålar mjuka 9 - 10 | |
Bukfenor | Egenskaper more or less normal |
Position abdominal behind origin of D1 | |
Fenstrålar hårda 0 | |
Fenstrålar mjuka |