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Year : 1993
Tome : 144
Volume : 8-9
Pages : 687-692
Title : Scanning electron microscopy study of Oestrus ovis (Linné 1761) larvae
Authors : CH. GUITTON et PH. DORCHIES
Summary : Scanning electron microscopy of the three larval instars of OEstrus ovis, the sheep nasal bot fly, allowed the study of spines and hooks. The first instar larva have many strong spines and hooks to keep on mucosa and to resist to the air stream in nasal cavities. The second instar shows only weak spinulosity ; il lives in a quiet place middle meatus or sinuses, The third instar larva carries ventral spines to move out of the upper respiratory tract. All these structures show a very good adaptation to the larval environment. A ventral orbicular hole with prominent rims is also described on the first larval instar, its significance is not known.
Keywords : scanning electron microscopy - larvae - Oestrus ovis.
Correspondence : CH. GUITTON
Adress : Laboratoire de Biologie animale, Université de Perpignan, F-66000 Perpignan.

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