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

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, a...

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Bibliographic Details
Published in:Journal of helminthology 2001, Vol.75 (1), p.81-92
Main Authors: Stock, S.P., Heng, J., Hunt, D.J., Reid, A.P., Shen, X., Choo, H.Y.
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
California
China
Crosses, Genetic
Female
Fundamental and applied biological sciences. Psychology
Genetics of eukaryotes. Biological and molecular evolution
Invertebrata
Invertebrates
Korea
Male
Microscopy, Electron
Morphology. Histology. Cytology
Nemathelminthia. Plathelmintha
Nematoda - genetics
Nematoda - ultrastructure
Phenotype
Polymerase Chain Reaction
Polymorphism, Restriction Fragment Length
Population genetics, reproduction patterns
Tail - anatomy & histology
Vulva - anatomy & histology
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Summary: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.
ISSN:0022-149X
1475-2697
DOI:10.1079/JOH200036