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The Formation of the Anterior Feeding Apparatus in Dorylaims

The Formation of the Anterior Feeding Apparatus in Dorylaims THE FORMATION OF THE ANTERIOR FEEDING APPARATUS IN DORYLAIMS BY P. GROOTAERT and A. COOMANS Instituut voor Dierkunde, Rijksuniversiteit Gent, Ledeganckstraat 35, Gent, Belgium The formation of the anterior feeding apparatus during moulting was studied in Labronema vulvapapillatum and Aporcelaimellus obscurus. A new terminology is introduced for the sectors in the nematode pharynx: perradial (previously marginal), adradial and interradial (both previously radial). The form and structure of the cuticle of the odontophore and platelets depends upon the posi- tion of the secretory cells. In contrast to the body wall, the pharyngeal muscles (perradial and adradial) differentiate into secretory cells during moulting and are therefore considered as myoepithelial cells. The odontostyle is formed by a single cell. Its form is determined by a vacuole, into which the stylet material is secreted and where it condenses in a complicated way. The shape of the vacuole is maintained by longitudinal fibres which form a kind of cytoskeleton. Migration of the replace- ment odontostyle is discussed. The moulting process in dorylaims, and in particular the formation and replacement of the spear, was first described for Xiphinema by Coomans & De Coninck (1963) and subsequently for Aporcelaimellus and Aporcelaimus by Coomans & van http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematologica Brill

The Formation of the Anterior Feeding Apparatus in Dorylaims

Grootaert, P.; Coomans, A.
Nematologica , Volume 26 (4): 26 – Jan 1, 1980
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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2596
eISSN
1875-2926
DOI
10.1163/187529280X00350
Publisher site
See Article on Publisher Site

Abstract

THE FORMATION OF THE ANTERIOR FEEDING APPARATUS IN DORYLAIMS BY P. GROOTAERT and A. COOMANS Instituut voor Dierkunde, Rijksuniversiteit Gent, Ledeganckstraat 35, Gent, Belgium The formation of the anterior feeding apparatus during moulting was studied in Labronema vulvapapillatum and Aporcelaimellus obscurus. A new terminology is introduced for the sectors in the nematode pharynx: perradial (previously marginal), adradial and interradial (both previously radial). The form and structure of the cuticle of the odontophore and platelets depends upon the posi- tion of the secretory cells. In contrast to the body wall, the pharyngeal muscles (perradial and adradial) differentiate into secretory cells during moulting and are therefore considered as myoepithelial cells. The odontostyle is formed by a single cell. Its form is determined by a vacuole, into which the stylet material is secreted and where it condenses in a complicated way. The shape of the vacuole is maintained by longitudinal fibres which form a kind of cytoskeleton. Migration of the replace- ment odontostyle is discussed. The moulting process in dorylaims, and in particular the formation and replacement of the spear, was first described for Xiphinema by Coomans & De Coninck (1963) and subsequently for Aporcelaimellus and Aporcelaimus by Coomans & van

Journal

Nematologica – Brill

Published: Jan 1, 1980

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