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Redescription of Steinernema longicaudum Shen & Wang (Nematoda: Steinernematidae); geographic distribution and phenotypic variation between allopatric populations

Published online by Cambridge University Press:  12 April 2024

S.P. Stock ,
J. Heng ,
D.J. Hunt ,
A.P. Reid ,
X. Shen  and
H.Y. Choo
S.P. Stock*
Affiliation:
Department of Nematology, University of California Davis, Davis, CA 95616-8668, USA
J. Heng
Affiliation:
Institute of Biological Control, CAAS, Beijing 100081, China
D.J. Hunt
Affiliation:
CABI Bioscience, UK Centre (Egham), Bakeham Lane, Egham, Surrey, TW20 9TY, UK
A.P. Reid
Affiliation:
CABI Bioscience, UK Centre (Egham), Bakeham Lane, Egham, Surrey, TW20 9TY, UK
X. Shen
Affiliation:
Laiyang Agricultural College, Laiyang, 265200, China
H.Y. Choo
Affiliation:
Laiyang Agricultural College, Laiyang, 265200, China
*
*Fax: (530) 752 5809, E-mail: spstock@ucdavis.edu
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Abstract

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Steinernema longicaudum Shen & Wang is redescribed based on a comparative morphological study of specimens from the type isolate from China, and two other isolates recovered from Korea and the USA. For the first and second generation female, the location of the vulva, shape of the vulval lips, and shape and length of the tail were newly observed diagnostic characters. A more detailed description of the morphology of the male spicules and gubernaculum, and the arrangement of the genital papillae is included. A description, based on scanning electron microscopy observations, of the lateral field pattern of the third-stage infective juveniles is also provided. Additionally, restriction fragment length polymorphism profiles based on the internal transcribed spacer region, and cross-breeding tests supplement the description of this species.

Type
Research Article
Information
Journal of Helminthology , Volume 75 , Issue 1 , January 2001 , pp. 81 - 92
Copyright
Copyright © Cambridge University Press 2001

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