Étude morphologique et histologique des scutes des Macroramphosidae (Teleostei, gastérostéiformes) = Morphological and histological study of scutes in Macroramphosidae (Teleostei, Gasterosteiformes)
Fedrigo, O.; Meunier, F.J.; Duhamel, G.; Sire, J.-Y. (1996). Étude morphologique et histologique des scutes des Macroramphosidae (Teleostei, gastérostéiformes) = Morphological and histological study of scutes in Macroramphosidae (Teleostei, Gasterosteiformes). Cah. Biol. Mar. 37(3): 189-203
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723; e-ISSN 2262-3094, meer
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| Auteurs | | Top |
- Fedrigo, O.
- Meunier, F.J.
- Duhamel, G.
- Sire, J.-Y.
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| Abstract |
In the three genera of Macroramphosidae, Macroramphosus, Notopogonand Centriscops, the scutes are small (0.1 to 0.5 mm) and composed of a flat basal plate from the middle of which a shaft arises. In Macroramphosus this shaft is covered by a ridged crown, the posterior margin of which is ornamented with one or several spines. The morphology of the scutes (SEM study) varies according to their location on the body, particularly in Notopogon, and the characteristics of the ornamentations are different from one genus to another. Moreover, as these ornamentations also show interspecific variations, they could be used for systematic purposes. The antero-posterior orientation of the superficial ridges led us to suggest that they have a hydrodynamical function similar to that described for the placoid scales in Chondrichthyans. A detailed, structural and ultrastructural (TEM) study of the scutes in M. scolopax and N. xenosoma has shown a similar tissue composition. They are constituted entirely of parallel-fibered bone which is homogeneously mineralized. This bone is avascular and acellular, and its matrix shows clear lines of arrested growth. This structural organization is completely different from that of elasmoid scales. |
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