Thelastoma gueyei sp.n. (Nematoda:Thelastomatidae) from the Senegal diplopod Archispirostreptus tumuliporus (Diplopoda: Spirostreptidae)

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Authors

KOUBKOVÁ Božena BARUŠ Vlastimil MATĚJUSOVÁ Iveta HODOVÁ Iveta KOUBEK Petr

Year of publication 2006
Type Article in Periodical
Magazine / Source Nematology
MU Faculty or unit

Faculty of Science

Citation
Field Zoology
Keywords DNA barcoding; long-tailed thelastomatids; morphology;morphometrics; SEM; Senegal;
Description Thelastoma gueyei sp. n., a nematode belonging to the long-tailed species group of the genus Thelastoma, is described from the diplopod Archispirostreptus tumuliporus (Spirostreptidae) collected in Niokolo Koba National Park (Senegal, West Africa).Thelastoma gueyei sp. n. is morphologically most similar to T. gipetiti. Females are characterised by: the vulva being situated in theposterior half of the body and near to the anus (V_ = 75-86) with the anterior vulval lip developed into a prominent flap; excretory pore located at the level of the anterior end of the pharyngeal bulb; b_ = 28-38 and tail, expressed as a proportion of L_, = 1.7-2.7. Males have narrow cuticular alae extending from about the middle of the pharynx to the level of the anteriormost pair of copulatorypapillae; four pairs of copulatory papillae, two large, subventral, pairs being located adcloacally on the genital cone, a third, much smaller pair on the posterior margin of the genital cone and the last pair being situated at the mid-point of the tail spike; and a tailoccupying 10.8-13.2% of the total body length. The distal tip of the spicule is drop-shaped. Morphological characteristics were studied using scanning electron microscopy and a comparison of the long-tailed group of thelastomatids is provided. Nucleic acid sequence ofthe small subunit ribosomal RNA gene was obtained for purposes of DNA barcoding.
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