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Larvae Information Summary for
Glyptocephalus cynoglossus
| Main Ref: | Russell, F.S. 1976 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | 6 | 3.9 | 5 | 73 |
| Preanal L. % TL | 34 | 29 |
| Place of development | planktonic | |||
| Larval area | to be filled | |||
| Yolk-sac | ovoid unpigmented | Ref: | 37 | |
| Yolk | unsegmented | Oil globules | no oil globule | |
| Rows on tail | no rows | |||
| Other melanophores on tail | more than two dorso-ventral clusters or bands | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| The yolk has a pyriform shape with the broader end anterior. | ||||
Post larvae
| Striking feature | none | |||
| Striking shape lateral | normal (not striking) | dorsal | compressed | |
| Striking feature | none | |||
| Shape of gut | spherical or gut loop | |||
| Gas bladder early | invisible | late | invisible | |
| Spinal armature early | no spines | late | opercular spines only | |
| Pigmentation early | ||||
| Rows on tail | ventral row | |||
| Other melanophores on tail | more than two dorso-ventral clusters or bands | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Pigmentation late | ||||
| Rows on tail | ventral row | |||
| Other melanophores on tail | more than two dorso-ventral clusters or bands | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Urostyle region early | pigmented | late | pigmented | |
| Peritoneum | covered with melanophores | |||
| Pectorals | normal without melanophores | |||
| Pelvics | normal (i.e. small or absent) | |||
| Characteristic group of spines on the operculum appearing at 11 mm length. Two dorso-ventral clusters on the tail. Three additional ventral clusters and urostyle region heavily pigmented. | ||||
| L 1st feeding | Ref. | Months of presence of larvae | ||||
| max | 6 | Jan | Feb | Mar | Apr | |
| min | 5.2 | May | Jun | Jul | Aug | |
| mod | 5.4 | Sep | Oct | Nov | Dec | |
| Water parameters Metric characters |
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