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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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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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description	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.
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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. 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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
title	Morphological differences between Radopholus citrophilus and R. similis
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