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Morphological and molecular characterisation of Telotylenchus tamariscus n. sp. (Nematoda: Telotylenchinae) recovered from Khuzestan, south-western Iran

In: Nematology
Authors:
Manouchehr HosseinvandDepartment of Plant Protection, Faculty of Agriculture, University of Zanjan, 45371-38791, Zanjan, Iran

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Ali EskandariDepartment of Plant Protection, Faculty of Agriculture, University of Zanjan, 45371-38791, Zanjan, Iran

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Reza GhaderiDepartment of Plant Protection, School of Agriculture, Shiraz University, 71441-65186, Shiraz, Iran

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Summary

An undescribed species from the rhizosphere of tamarisk, Tamarix passerinoides, Telotylenchus tamariscus n. sp., is illustrated and described based on morphological, morphometric and molecular approaches. The new species is characterised by female characters including body size of ca 1 mm, areolated lateral fields, cephalic region rounded, distinctly set off from the body contour, stylet 19.5 (18.5-20.5) μm long with posteriorly directed basal knobs, pharyngeal glands overlapping intestine dorso-laterally, subcylindrical tail bearing 32 (25-37) cuticular annuli and ending in an annulated terminus, and male spicules and gubernaculum 27 (25-29) and 13 (12.5-14.5) μm long, respectively. Morphologically, our population comes close to several known species of the genus, including T. avaricus, T. aerolatus, T. indicus, T. ventralis, T. paaloofi and T. namibiensis. In the 18S rRNA phylogenetic tree, it occupied a phylogenetic position in close affinity with two sequences of T. ventralis. In the 28S rRNA tree, the genus Telotylenchus did not form a monophyletic group, our isolate clustering with an unknown population of Histotylenchus and four isolates of Tylenchorhynchus mediterraneus in a clade well separated from another clade that included three other isolates tentatively named as Telotylenchus sp.

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