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Development of the bony skull in common sole: brief survey of morpho-functional aspects of ossification sequence
In: Journal of Fish Biology. Fisheries Society of the British Isles: London,New York,. ISSN 0022-1112; e-ISSN 1095-8649, meer
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| Trefwoorden |
Pleuronectiformes [WoRMS]; Soleidae Bonaparte, 1833 [WoRMS]
Marien/Kust |
| Author keywords |
Pleuronectiformes; Soleidae; ontogeny; osteology; functional demands |
| Abstract |
The postembryonic development of the bony cephalic skeleton in the common sole Solea solea, observed from hatching to the juvenile stage or postmetamorphic larva, appears to follow a similar chronological order to that observed in Other Pleuronectiformes and Pereiformes and the sequence in bone formation is a response to functional demands. At hatching. S. solea has no holly structure, On day 4, only the outlines of maxillaries and opercular bones are visible. On day 6, a thin parasphenoid appears between the orbits and isolates the braincase from the buccal cavity making food ingestion possible Without any impact on the brain. On day 8, the dentaries form and two small preopercular bones appear on each side of the head. On day 9, at weaning from the yolk sac, branchial arches support the gill filaments (used for respiration and trapping phytoplankton which pass through the open mouth). On day 10, the premaxillaries develop in front of the maxillaries. The superimposing of the maxillaries and the premaxillaries is a typical feature of species possessing an acanthopterygian protractile mouth at the adult stage. On day 12, the frontals develop above the orbits and the set of opercular bones is complete. On day 18, the migration of the left eye begins. On day 20, the left eye has moved to the median crest of the head. On day 23, both eyes are located on the same side. On day 26, the braincase is formed by a basioccipital, exoccipitals, pterotics, sphenotics and a supraoccipital. On day 50, new structures have appealed, others have developed and have Undergone an extensive remodeling due to metamorphosis. (C) 2001 The Fisheries Society of the British Isles. |
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