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Redescription of the root-lesion nematode, Pratylenchus globulicola Romaniko, 1960 (Tylenchida: Pratylenchidae) from the Ural Federal District of Russia

Ryss, Alexander Yu ; Pridannikov, Mikhail V. ; Subbotin, Sergei A.

Russian Journal of Nematology 2022

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  • Título:
    Redescription of the root-lesion nematode, Pratylenchus globulicola Romaniko, 1960 (Tylenchida: Pratylenchidae) from the Ural Federal District of Russia
  • Autor: Ryss, Alexander Yu ; Pridannikov, Mikhail V. ; Subbotin, Sergei A.
  • Descrição: A redescription of the root-lesion nematode, Pratylenchus globulicola, is given in this paper. It was originally described as a pest for legume crops in the Ural district, Russia, but was later considered by several taxonomists as a synonym of P. penetrans. In 2010 and 2011, new nematode material was obtained in the type locality from the type and other hosts and the extracted females and males were morphologically identified as P. globulicola. Neotype and neoparatypes are designated for this species. The species has four lip annuli, or four at one side and three at another side of the offset anteriorly flattened cephalic region, strongly sclerotised cephalic framework and strong stylet 14-15 µm long with anteriorly flattened basal knobs, DGO = 2.5-3.5 µm, pharyngeal glands lobe = 41 (29-54) µm, four equidistant, not areolated lateral field incisures, single genital tract and post-uterine sac (PUS) located to the right side from intestine, spermatheca spherical to oval, averaged 14 × 13 µm, filled with spherical to oval nucleic sperm of 3 µm in diam., distance from spermatheca to vagina = 41.9 (19-60) µm, vulva = 78 (72-82)%, PUS with three to four distal cellular elements, right to intestine, 24.4 (17-33) µm long or 1.2 (0.8-1.5) times of the vulval body diameter or 36 (23-49)% of vulva-anus distance, tail subcylindrical, bearing 11 (10-14) annuli on ventral side. Phasmids located slightly posterior to mid-tail. Tail tip smooth, flat in lateral view or rarely sub-hemispherical in ventral or dorsal orientation. The comparisons of ITS and D2-D3 expansion segments of the 28S rRNA gene sequences of P. globulicola revealed that those sequences are highly identical to corresponding gene sequences of P. vovlasi syn. n. Pratylenchus vovlasi syn. n. was proposed here as a junior synonym of P. globulicola based on analysis of morphological and molecular datasets. The rRNA gene sequences of P. globulicola clustered with the sequences of P. pratensis and P. pseudopratensis, forming the Pratensis clade.
  • Editor: Russian Journal of Nematology
  • Data de criação/publicação: 2022
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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