Taxonomic Limits of the Genus Nagelus (Thorne and Malek, 1968 Siddiqi, 1979 with a Description of Nagelus borealis n.sp. from Alaska

Authors

  • Thomas O. Powers
  • James G. Baldwin
  • A. H. Bell

Abstract

The genus Nagelus (Thorne and Malek, 1968) Siddiqi, 1979 is modified and a new species from Alaska is described. The combination of scanning electron microscopy and light microscopy permits the characterization of Nagelus spp. as having a broadly oval face pattern, no longitudinal striations on the lip region, deirids surrounded by six incisures, and an irregularly tapering tail with a large hyaline region. Nagelus leptus (Allen, 1955) Siddiqi, 1979, N. alpensis Doucet and Luc, 1981, N. camelliae (Kheiri, 1972) Siddiqi, 1979, N. jamelensis (Nesterov, 1973) Siddiqi, 1979, attd N. obscurus (Allen, 1955) n. comb. are retained on this basis. Nagelus borealis n. sp. is characterized by a styler length of 30 [mu]m or more, an irregularly scalloped perioral disc, and a proportionately larger basal bulb. Nagelus abalosi (Doucet, 1978) Doucet. 1980 and N. virginalis (Doucet, 1978) Doucet, 1980 are synonymized with N. leptus. Nine other species from Nagelus are transferred to Merlinius Siddiqi, 1970. Key words: Merliniinae, taxonomy, Tylenchorhynchidae, scanning electron microscopy.

Downloads

Published

1983-10-15

Issue

Vol. 15, No. 4 (October 1983)

Section

Articles

License

Copyright and Permissions

All material published by the Society of Nematologists (SON), except for papers prepared by United States and Canadian government employees, is copyrighted and protected under the U.S. copyright law. Under the Copyright Act of 1976, the term of copyright for materials registered by an organization is 75 years from the date first published. Before publishing any manuscript, SON requires that authors transfer full and complete ownership of any copyright to SON by signing a JON Page Charge/Copyright Form (.pdf). SON then registers the copyright. Subsequent use of published materials requires written permission from the SON and may be obtained by contacting the current Editor-in-Chief and state where and how the material will be used.

The author warrants that the article is an original work not published elsewhere in whole or in part, except in abstract form, and that the author has full power to make this grant. If portions of the article have been published previously, then the author warrants that permission has been obtained from the copyright holder and the author will submit a copy of the permission release with this copyright transfer form.

SON shall claim no proprietary right other than copyright. Authors and coauthors retain the right to revise, adapt, modify, or otherwise use all or part of the article in future works of the author(s), such as press releases, lectures, and reviews, provided that all such use is for the personal noncommercial benefit of the author(s). All patent rights are retained by the author(s).