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The Male Copulatory System in Tylenchid Taxonomy (Nematoda)

The Male Copulatory System in Tylenchid Taxonomy (Nematoda) THE MALE COPULATORY SYSTEM IN TYLENCHID TAXONOMY (NEMATODA) BY E. GERAERT Instituut voor Dierkunde, Rijksuniversiteit Gent, Ledeganckstraat 35, 9000 Gent, Belgium and A. DE GRISSE Leerstoel voor Dierkunde, Rijksuniversiteit Gent, Coupure 533, 9000 Gent, Belgium 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%). Although spicule structure is used in tylenchid taxonomy, most species description do not mention details of spicule shape but give only its length. We consider the importance of form and dimensions. In all tylenchs, except Aphelenchoides (Clark & Shepherd, 1977), spicules have a cylindrical part (base + shaft) and a flattened part (blade) with incurved edges. The http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematologica Brill

The Male Copulatory System in Tylenchid Taxonomy (Nematoda)

Geraert, E.; De Grisse, A.
Nematologica , Volume 27 (4): 11 – Jan 1, 1981
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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2596
eISSN
1875-2926
DOI
10.1163/187529281X00421
Publisher site
See Article on Publisher Site

Abstract

THE MALE COPULATORY SYSTEM IN TYLENCHID TAXONOMY (NEMATODA) BY E. GERAERT Instituut voor Dierkunde, Rijksuniversiteit Gent, Ledeganckstraat 35, 9000 Gent, Belgium and A. DE GRISSE Leerstoel voor Dierkunde, Rijksuniversiteit Gent, Coupure 533, 9000 Gent, Belgium 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%). Although spicule structure is used in tylenchid taxonomy, most species description do not mention details of spicule shape but give only its length. We consider the importance of form and dimensions. In all tylenchs, except Aphelenchoides (Clark & Shepherd, 1977), spicules have a cylindrical part (base + shaft) and a flattened part (blade) with incurved edges. The

Journal

Nematologica – Brill

Published: Jan 1, 1981

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