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The capitulum and feeding mechanism of Dermacentor parumapertus Neumann 1901

Published online by Cambridge University Press:  06 April 2009

Don R. Arthur
Don R. Arthur
Affiliation:
Department of Zoology, King's College, University of London
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Extract

The external structure of the capitulum of all stages of Dermacentor parumapertus is described in detail. The capitulum is divisible into an extra-basis and basis regions. The former consists of a dorsally grooved hypostome or food channel overlapped by a labral membrane, along its whole length. The salivary channel lies above the labral membrane, being bordered laterally by the meso-ventral margins of the outer cheliceral sheaths. Within the basis a vertical wall separates the base of the palpal cavity from the rest of the basis. This wall is produced backwards to form a wing or ala on either side of the pharynx and to it are attached dilator and constrictor muscles. Opening of the fore-part of the pharynx, i.e. where it is in the form of a V-shaped depression overlapped by a wedge, is effected by ventral and ventro-lateral dilator muscles, and closure by the elasticity of the pharyngeal walls.

The pharynx, oesophagus and salivary glands are described.

Type
Research Article
Information
Parasitology , Volume 47 , Issue 1-2 , June 1957 , pp. 169 - 184
Copyright
Copyright © Cambridge University Press 1957

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References

Arthur, D. R. (1951). The capitulum and feeding mechanism of Ixodea hexogonus Leach. Parositology, 41, 66–81.CrossRefGoogle ScholarPubMed
Philip, C. B. & Hughes, L. E. (1953). Disease agents found in the rabbit tick, Dermacentor parumapertus in the south-western U.S. VI. Congresso Internazionale di Microbiologica, Sezioni VIII–XVI, 2, no. 790, pp. 600. Rome, 1953.Google Scholar