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The Male Copulatory System in Tylenchid Taxonomy (Nematoda)

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For more content, see Nematology.

The ultrastructure of the hoplolaim spicule differs little from that of other tylenchs examined; in hoplolaims the gubernaculum has a ventral cuticular guiding bar in addition to the dorsal one found in all tylenchs. The genera Helicotylenchus, Pratylenchus, Hirschmanniella and Rotylenchulus have spicule tips prolonged ventrally, whereas in other tylenchs it is prolonged dorsally. The spicules of Anguinidae are shorter and flatter than those of the other tylench families. Spicule length depends on body length; some remarkably constant ratios of spicule length to body length are found. The longest spicules occur in the Criconematoidea (3-13% of body length) and the shortest in Hirschmanniella and Meloidogyne (1.6%).

Affiliations: 1: Instituut voor Dierkunde, Rijksuniversiteit Gent, Ledeganckstraat 35, 9000 Gent, Belgium; 2: Leerstoel voor Dierkunde, Rijksuniversiteit Gent, Coupure 533, 9000 Gent, Belgium


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