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Larvae Information Summary for
Hyperoplus lanceolatus
| Main Ref: | Russell, F.S. 1976 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | 4.5 | |||
| Preanal L. % TL | 68.3 | 63.2 | 65.5 |
| Place of development | planktonic | |||
| Larval area | to be filled | |||
| Yolk-sac | pigmented | Ref: | ||
| Yolk | unsegmented | Oil globules | one oil globule | |
| Rows on tail | ventral row | |||
| Other melanophores on tail | tail with single melanophore | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Black pigmentation on dorsal and postanal body rows, and dorsal and ventral gut rows. The rectum does not reach the fin margin. | ||||
Post larvae
| Striking feature | none | |||
| Striking shape lateral | normal (not striking) | dorsal | normal (not striking) | |
| Striking feature | none | |||
| Shape of gut | elongated | |||
| Gas bladder early | invisible | late | invisible | |
| Spinal armature early | no spines | late | no spines | |
| Pigmentation early | ||||
| Rows on tail | dorsal + ventral row | |||
| Other melanophores on tail | tail with single melanophore | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Pigmentation late | ||||
| Rows on tail | dorsal + ventral row | |||
| Other melanophores on tail | tail with single melanophore | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Urostyle region early | pigmented | late | pigmented | |
| Peritoneum | with row of melanophores | |||
| Pectorals | normal | |||
| Pelvics | normal (i.e. small or absent) | |||
| Early forward extension of the dorsal body row of melanophores, eventually right to the head, and presence of ventral gut melanophores. In later stages, the caudal pigmentation is characteristic of the species. | ||||
Meristic characters
| max | min | mod | Ref. | |
| Total number of vertebrae | 70 | 64 | 67 | 37 |
| L 1st feeding | Ref. | Months of presence of larvae | ||||
| max | Jan | Feb | Mar | Apr | ||
| min | May | Jun | Jul | Aug | ||
| mod | 5.25 | Sep | Oct | Nov | Dec | |
| Water parameters Metric characters |
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