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Larvae Information Summary for
Myrophis vafer
| Main Ref: | Charter, S.R. and H.G. Moser 1996 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | ||||
| Preanal L. % TL | 53 | 41 | 45 | 35581 |
| Place of development | planktonic | |||
| Larval area | Ranges from Punta Marques, Baja California Sur south and into the Gulf of California | |||
| Yolk-sac | Ref: | |||
| Yolk | Oil globules | |||
| Rows on tail | ||||
| Other melanophores on tail | ||||
| 'Leaf-shaped' larva known as leptocephalus. | ||||
Post larvae
| Striking feature | teeth clearly visible | |||
| Striking shape lateral | eel-like | dorsal | compressed | |
| Striking feature | teeth clearly visible | |||
| Shape of gut | tube-like | |||
| Gas bladder early | late | |||
| Spinal armature early | late | |||
| Pigmentation early | ||||
| Rows on tail | ventral + lateral row | |||
| Other melanophores on tail | no other melanophores | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Pigmentation late | ||||
| Rows on tail | ventral + lateral row | |||
| Other melanophores on tail | no other melanophores | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Urostyle region early | pigmented | late | pigmented | |
| Peritoneum | with row of melanophores | |||
| Diagnostic characters: leptocephalus larva; nephros at about myomere 60 (55-63); 3 liver lobes; 3 gut swellings (not looped); gut length usually <50% of body length; midlateral pigmentation not limited to myosepta. Pigmentation: few on upper jaw; anterior and posterior to heart; irregular on notochord and often just below notochord; irregular on body wall; laterally on liver lobes; few dorsolaterally on gut; patchy on anal pterygiophores; on caudal pterygiophores. Sequence of fin development: caudal, anal, dorsal and pectoral. | ||||
Meristic characters
| max | min | mod | Ref. | |
| Total number of myomeres | 164 | 152 | 156 | 35581 |
| L 1st feeding | Ref. | Months of presence of larvae | ||||
| max | Jan | Feb | Mar | Apr | ||
| min | May | Jun | Jul | Aug | ||
| mod | Sep | Oct | Nov | Dec | ||
| Water parameters Metric characters |
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