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Larvae Information Summary for
Lampanyctus regalis
| Main Ref: | Moser, H.G. and E.H. Ahlstrom 1996 | |||
Yolk-sac larvae
| max | min | mod | Ref. | |
| Length at birth (mm) | 3.2 | |||
| Preanal L. % TL | 70 | 29 |
| Place of development | planktonic | |||
| Larval area | California Current region | |||
| Yolk-sac | Ref: | |||
| Yolk | Oil globules | |||
| Rows on tail | ||||
| Other melanophores on tail | ||||
Post larvae
| Striking feature | light organs | |||
| Striking shape lateral | normal (not striking) | dorsal | ||
| Striking feature | light organs | |||
| Shape of gut | spherical or gut loop | |||
| Gas bladder early | pigmented | late | pigmented | |
| Spinal armature early | no spines | late | no spines | |
| Pigmentation early | ||||
| Rows on tail | no rows | |||
| Other melanophores on tail | no other melanophores | |||
| Melanophores on head + trunk | melanophores on head | |||
| Pigmentation late | ||||
| Rows on tail | no rows | |||
| Other melanophores on tail | no other melanophores | |||
| Melanophores on head + trunk | melanophores on head + trunk | |||
| Urostyle region early | unpigmented | late | unpigmented | |
| Pectorals | normal with rows of melanophores | |||
| Pelvics | fin rays only with melanophores | |||
| Initially, head small, body slender, and gut short and strongly sigmoid; beginning at about 5.0 mm, head and body become deep and compressed; head large with elongate snout and large jaws armed with large teeth; tooth patch with larger teeth on upper jaw tip; pectoral and pelvic fins large and pigmented; distinctive pigment pattern with adipose blotch and stripe through eye; only Br2 develops during larval period (7.8 mm SL), remaining photophores develop synchronously at end of transformation period. Pigmentation: Preflexion: unpigmented except for spots on lower jaw tip and snout; jaw tips, internal along snout, postorbital, opercle; pectoral and pelvic fins; large spot at adipose fin. Flexion: on snout at tip, on nostril, and just anterior to eye; 1 posterior to orbit; blotch at adipose fin; series above gut and gas bladder; on inner surface of pectoral fin base; 1 in midline above cerebellum; peppering on pelvic fin blades. Postflexion: myosepta becoming outlined in gut region; some develop 1 in middle anterior to dorsal fin. Sequence of fin development: caudal, dorsal and anal and pectorals and pelvics (pelvics may form early). | ||||
Meristic characters
| max | min | mod | Ref. | |
| Total number of vertebrae | 39 | 36 | 31442 |
| 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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