Contribution
Rezeptoren und periphere synaptische Verschaltungen bei verschiedenen Arachnida
[Receptors and Peripheral Synaptic Integration in Various Arachnida]
Foelix, Rainer F.
Entomologica Germanica Band 3 Heft 1-2 (1976), p. 83 - 87
12 références bibliographiques
publié: Oct 4, 1976
DOI: 10.1127/entom.germ/3/1976/83
ArtNo. ESP346000301007, Prix: 29.00 €
Abstract
The hair sensilla of Araneae, Acarina, Amblypygi, Opiliones and Scorpiones are comparatively discussed. The ubiquitous type hair sensillum seems to be a contact chemoreceptor, consisting of two mechanosensitive dendrites ending at the hair base, and several chemosensitive dendrites ending at a pore near the hair tip. Pure mechanoreceptive hair sensilla have only been observed in Araneae, Acarina and Scorpiones. The receptor axons of hair sensilla normally proceed directly to the CNS. In Amblypygi, however, distinct synapses have been found in sensory nerves of the long first legs. Many synapses converge upon a few large fibres and are reminiscent of giant fibre systems known from insects. Among the other Arachnid orders, synapses have also been noted within sensory nerves, yet apparently giant fibres are lacking. Common to all Arachnid orders are intraepithelial synapses, which most likely link receptor axons.