Morphological differences between Radopholus citrophilus and R. similis

SEM observations of the external morphology of populations of Radopholus citrophilus and R. similis revealed several diagnostic differences. The cloaco-spicular orifice on males of R. citrophilus had three to seven genital papillae (anterior hypoptygmata), whereas males of R. similis were either smo...

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Bibliographic Details
Published in:Journal of nematology 1988-01, Vol.20 (1), p.150-157
Main Authors: Huettel, R.N, Yaegashi, T
Format: Article
Language:English
Subjects:
ANATOMIA
ANATOMIE
ANATOMY
CHROMOSOME NUMBER
CITOGENETICA
CITRUS
CYTOGENETICS
CYTOGENETIQUE
DIFERENCIACION
DIFFERENCIATION
DIFFERENTIATION
FLORIDA
FLORIDE
HAWAI
HAWAII
NOMBRE CHROMOSOMIQUE
NUMERO DE CROMOSOMAS
RADOPHOLUS
RADOPHOLUS SIMILIS
TAXONOMIA
TAXONOMIE
TAXONOMY
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Summary:SEM observations of the external morphology of populations of Radopholus citrophilus and R. similis revealed several diagnostic differences. The cloaco-spicular orifice on males of R. citrophilus had three to seven genital papillae (anterior hypoptygmata), whereas males of R. similis were either smooth or had one or two shorter genital papillae (anterior hypoptygmata). Females of R. citrophilus had four annules in the region of the vulval opening, but R. similis had five annules in the same region. The labial disc and lateral lips appeared to be of diagnostic significance, but these areas were more susceptible to artifacts due to fixation. An unknown population of Radopholus from Puerto Rico with a chromosome number of n = 4 was morphologically similar to R. similis. These morphological differences provide additional support that R. citrophilus and R. similis are distinct species.
ISSN:0022-300X
2640-396X