Main Ref. | Dewitt, H.H., P.C. Heemstra and O. Gon, 1990 |
Appearance refers to | |
Bones in OsteoBase |
Specialized organs | other |
Different appearance | always different morphology between mature adults |
Different colors | |
Remarks | Males develop longer pelvics than females (Ref. 28937). |
Striking features | none |
Body shape lateral | fusiform / normal |
Cross section | oval |
Dorsal head profile | more or less straight |
Type of eyes | more or less normal |
Type of mouth/snout | upper jaw greatly elongated |
Position of mouth | superior |
Type of scales | cycloid scales |
Diagnosis |
Pre-opercular-mandibular canal pores 9 (rarely 10), with 3 (rarely 4) on the mandible. Infraorbital canal with 4+2 pores; lateral line organs (neuromasts) present exposed region between the canal segments, the normal number probably being 4 (rarely 5), but some or all are often missing. Supraorbital canal with 3+1 pores (a second, more posterior pore rarely present in postero-dorsal section); between these 2 supraorbital canal segments is a trough divided by 3 low transverse ridges into 4 shallow depressions; on each ridge is a neuromasts organ. Temporal canal with 1+4 pores; between the 2 segment lies a single exposed neuromast. Supratemporal canal with 1+1 pores; no traces of neuromasts were found in the intervening regions. Color: In life, pink with a silvery hue, the dorsal surface slightly darker. All fins pale, with clear hyaline membranes. The body becomes silvery with a darker dorsum only after death (Ref. 28937). |
Ease of Identification |
Lateral Lines | 3 Interrupted: No |
Scales on lateral line | |
Pored lateral line scales | |
Scales in lateral series | 50 - 56 |
Scale rows above lateral line | |
Scale rows below lateral line | |
Scales around caudal peduncle | |
Barbels | |
Gill clefts (sharks/rays only) | |
Gill rakers | |
on lower limb | 8 - 12 |
on upper limb | 20 - 26 |
total | 29 - 35 |
Vertebrae | |
preanal | |
total | 52 - 56 |
Attributes | |
Fins number | 2 |
Finlets No. | Dorsal 0 - 0 |
Ventral 0 - 0 | |
Spines total | 6 - 8 |
Soft-rays total | 35 - 38 |
Adipose fin | absent |
Attributes | more or less truncate; more or less normal |
Fins number | 1 |
Spines total | 0 - 0 |
Soft-rays total | 36 - 39 |
Pectoral | Attributes more or less normal |
Spines 0 | |
Soft-rays 19 - 21 | |
Pelvics | Attributes more or less normal |
Position thoracic before origin of D1 | |
Spines | |
Soft-rays |