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THE HEAD STRUCTURES OF SOME TYLENCHS WITH SPECIAL ATTENTION TO THE AMPHIDIAL APERTURES BY E. GERAERT Laboratorium voor Morfologie, Instituut voor Dierkunde, Rijksuniversiteit Gent, Belgium A study of some smaller Tylenchs shows that some of them have large and unexpected forms of amphidial apertures. A general review, describing hitherto unreported forms is presented. Remarks on different aspects of the lip-region are given separately. The genus P.rilenchu.r as defined by Thorne, 1949 and the males of Meloidogyne, are known to have slit-like amphidial apertures that are segments of chords. A more oblique position was recorded for Tyle;zchus grami?ao?hzlu.r (Siddiqi, 1959) Goodey, 1963 and for Boleodorus volutu.r Lima & Siddiqi, 1963. An oval amphidial aperture occurs in Dolichodoru.r Jilvestris Adams, 1963 and is directed radially. As the amphidial apertures in most other Tylenchs have been reported as minute and pore-like, the cases mentioned above have always been considered interesting exceptions. A study of some smaller Tylenchs, shows that other and unexpected forms of amphidial apertures occur. In studying end-on views, attention has been paid to the general structure of the lip-region though the stoma, together with stylet and stylet-muscles has not been studied in detail; the figures given only reflect
Nematologica – Brill
Published: Jan 1, 1965
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