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Ultrastructure des organes chordotonaux des pièces céphaliques chez la larve du Speophyes lucidulus delar (coléoptère cavernicole de la sous-famille des bathysciinae)

Fine structure of the chordotonal organs of the head appendages of Speophyes lucidulus larva

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Summary

The chordotonal organs located in the various head appendages of the Speophyes larva, can be divided into two classes.

The scolopidial receptors of the antenna, the labium and the palpus maxillae belong to the first class. They can be compared to the scolopidium of the locust tympanic organ described by Gray.—The second class contains the scolopidial receptors of the mandible and the lacinia: their type is amphinematic.

The scolopidial sensilla of the galea represents an intermediate type.

We demonstrate many supporting and fixation structures which probably allow a good transmission of all the deformations and strains affecting the tegument.

The function of the gap junction which connects the two dendrites in the scolopidia of the second class is discussed.

Finally we try to formulate hypothesis of the functioning of scolopidia.

Résumé

Les organes chordotonaux présents dans les différentes pièces céphaliques de la larve du Speophyes peuvent être classés en deux catégories.

La première catégorie regroupe les récepteurs scolopidiaux de l'antenne, du labium et du palpe maxillaire. On peut les comparer au scolopidium de l'organe tympanique du Criquet décrit par Gray (1960). La deuxième catégorie comprend les récepteurs scolopidiaux de la mandibule et de la lacinia: ils sont du amphinématique.

Le sensille scolopidial de la galea représente un type intermédiaire.

Nous signalons l'importance des structures de soutien et de fixation, qui doivent permettre une bonne transmission de toutes les déformations et tensions subies par le tégument. Nous discutons du rôle joué par la ≪gap junction≫ qui unit les deux dendrites dans les scolopidium. de la deuxième catégorie.

Enfin nous essayons d'établir des hypothèses sur le fonctionnement des scolopidium.

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Corbière-Tichané, G. Ultrastructure des organes chordotonaux des pièces céphaliques chez la larve du Speophyes lucidulus delar (coléoptère cavernicole de la sous-famille des bathysciinae). Z. Zellforsch. 117, 275–302 (1971). https://doi.org/10.1007/BF00330742

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