Skip to main content Skip to main navigation menu Skip to site footer
Type: Article
Published: 2020-03-30
Page range: 387–396
Abstract views: 70
PDF downloaded: 2

Redescription of Basiria gracilis (Thorne, 1949) Siddiqi, 1963 (Rhabditida, Tylenchidae) from South Africa

Green Biotechnologies Research Centre of Excellence, University of Limpopo, Private Bag, X1106, Sovenga 0727, South Africa.
Departamento de Biología Animal, Biología Vegetal y Ecología, Universidad de Jaén. Campus “Las Lagunillas” s/n. 23071-Jaén, Spain.
Green Biotechnologies Research Centre of Excellence, University of Limpopo, Private Bag, X1106, Sovenga 0727, South Africa.
Nematoda morphometrics description SEM taxonomy


Basiria gracilis is redescribed from North West Province, South Africa, associated with willow (Salix sp.), which is a dominant ornamental tree species in the province. B. gracilis is characterised by its female body length (692–994 µm), lateral field with two longitudinal incisures, weakly cuticularised labial framework, high lip region lacking annuli, stylet 8–13 µm long, axial spermatheca filled with small rounded sperm, conical-elongated female tail with round to pointed terminus (103–146 µm, c=6.1–7.4, c’=8.8–12.1). Morphologically, B. gracilis is closely related to B. paragracilis but the taxa are differentiated on the basis of lip region and stylet morphology. In addition, B. gracilis is reported for the first time from South Africa. Line drawings, LM and SEM illustrations are given for the species.



  1. Abolafia, J. (2015) A low-cost technique to manufacture a container to process meiofauna for scanning electron microscopy. Microscopy Research and Technique, 78, 771–776.

    Abolafia, J. & Peña-Santiago, R. (2017) On the identity of Chiloplacus magnus Rashid & Heyns, 1990 and C. insularis Orselli & Vinciguerra, 2002 (Rhabditida: Cephalobidae), two confusable species. Nematology, 19, 1017–1034.

    Andrássy, I. (1963) Freilebende Nematoden aus Angola, I. Einige moosbewohnende Nematoden. Lisboa: Publicações Culturais da Companhia de Diamantes de Angola, Lisboa, 66, 57–69.

    Andrássy, I. (1981) Genera and species of the family Tylenchidae Örley, 1880 (Nematoda). The genus Malenchus Andrassy, 1968. Acta Zoologica Academiae Scientiarum Hungaricae, 27, 1–47.

    Baermann, G. (1917) Eine einfache Methode zur Auffindung von Ankylostomum (Nematoden) Larven in Erdproben. Geneeskunding Tijdschrift voor Nederlandsch-Indië, 57, 131–137.

    Baldwin, J.G., Bumbarger, D. & Ragsdale, E. (2004) Revised hypotheses for phylogenetic homology of the stomatostylet in tylenchid nematodes. Nematology, 6, 623–632.

    Chitwood, B.G. (1933) A revised classification of the Nematoda. Journal of Parasitology, 20, 1–131.

    De Grisse, A. (1969) Redescription ou modifications de quelques techniques utililisées dans l’étude des nématodes phytoparasitaires. Mededelingen van de Rijksfaculteit Landbouwetenschappen Gent, 34, 351–369.

    De Ley, P. and Blaxter, M. L. (2002) Systematics position and phylogeny. In: Lee, D.E. (Ed.), The biology of nematodes. Harwood Academic Press, Reading, pp. 1–30.

    Ebsary, B.A. (1991) Catalog of the order Tylenchida (Nematoda). Research Branch Agriculture Canada, Ottawa, 196 pp.

    Eisvand, P., Nejad, R.F. & Azimi, S. (2019) Description of Basiria khouzestanensis n. sp. (Nematoda: Tylenchidae) from Iran and its phylogenetic relationships with other species in the family. Zootaxa, 4563 (3), 482.

    Ferris, H. & Bongers, T. (2006) Nematode indicators of organic enrichment. Journal of Nematology, 38, 3–12.

    Fotedar, D.N. & Mahajan, R. (1973) On two new species of the genus Basiria Siddiqi, 1959 (Nematoda: Psilenchinae) from Kashmir, India. Indian Journal of Zoology, 1, 49–52.

    Geraert, E. (1968) The Genus Basiria (Nematoda: Tylenchina). Nematologica, 14, 459–481.

    Geraert, E. (2008) The Tylenchidae of the world. Identification of the family Tylenchidae (Nematoda). Academia Press, Gent, Belgium, 520 pp.

    Geraert, E. & Raski, D.J. (1986) Three new species of Basirienchus g.n. from Southern Chile compared with Campbellenchus, Neothada and Basiria (Nematoda: Tylenchidae). Nematologica, 31, 266–288.

    Hashim, Z. (1985) The status of Neobasiria Javed, 1982 and a re-diagnosis of Basiria Siddiqi, 1959 (Nematoda: Tylenchida). Nematologica, 30, 238–241. [1984]

    Karegar, A. & Geraert, E. (1997) The genus Basiria Siddiqi, 1959 (Nematoda: Tylenchidae). 1. Introduction and species with two lateral lines. Nematologica, 43, 327–339.

    Karegar, A. & Geraert, E. (1998) The genus Basiria Siddiqi, 1959 (Nematoda: Tylenchidae). IV. General discussion, genus diagnosis and key to the species. Nematologica, 44, 1–13.

    Örley, L. (1880) Monograph of the anguillulids. Természetrajzi Füzetek, 4, 16–150. [in Magyar and German]

    Saha, M. & Khan, E. (1982) Duotylenchus bilineatus gen.n., sp.n. and Tylenchorhynchus badliensis sp.n. (Tylenchida: Nematoda) from Haryana, India. Indian Journal of Nematology, 11, 205–211.

    Shahina, F. & Maqbool, M.A. (1990) Studies on the genus Neopsilenchus (Nematoda: Ty- lenchidae) with description of Acusilenchus n. subgen., and three new species. Pakistan Journal of Nematology, 8, 49–63.

    Siddiqi, M.R. (1959) Basiria graminophila n.g., n.sp. (Nematoda: Tylenchinae) found associated with grass roots in Aligarh, India. Nematologica, 4, 217–222.

    Siddiqi, M.R. (1963) On the diagnosis of the nematode genera Psilenchus de Man, 1921, and Basiria Siddiqi, 1959, with a description of Psilenchus hilarus n. sp. Zeitschrift fir Parasitenkunde, 23, 164–169.

    Siddiqi, MR. (1964) Studies on Discolaimus spp. (Nematoda: Dorylaimidae) from India. Zeitschrift für zoologische Systematik und Evolutionsforschung, 2, 174–184.

    Siddiqi, M.R. (2000) Tylenchida parasites of plants and insects. 2nd Edition. CABI Publishing, Wallingford, 847 pp.

    Sultana, S. (1980) Four new species of the genus Basiroides Thorne & Malek, 1968 (Nematoda: Psilenchinae) from Andhra Pradesh. Geobios, 7, 134–139.

    Thorne, G. (1949) On the classification of the Tylenchida, new order (Nematoda: Phasmida). Proceedings of the Helminthological Society of Washington, 16, 3773.

    Thorne, G. & Malek, R.B. (1968) Nematodes of the Northern Great Plains. Part 1. Tylenchida (Nemata: Secernentea). South Dakota Agricultural Experiment Station, Technical Bulletin, 31, 1–111.