Description of Pratylenchus moensi n. sp. (Tylenchida: Pratylenchidae) intercepted on Artemisia sp. from Vietnam

Summary A new species, Pratylenchus moensi n. sp., was intercepted in the roots and rhizosphere of Artemisia sp. carried by a passenger arriving from Vietnam. It is characterised by amphimictic adults with lip region bearing two annuli, lateral field with four equidistant lines, partially areolated. Female stylet (16.9 (16.1-17.7) μ m) robust with broadly rounded knobs, V = 83.5 (82.0-84.9), with a large oblong spermatheca often full of sperm, tail subcylindrical, tip smooth. Male common, tail conoid with narrow and pointed tip; bursa finely crenate. According to the categorisation codes originally proposed by Castillo & Vovlas (2007) and revised by Gafur (2020), the new species is defined as A1-B2-C3-D3(2)-E3-F234-G23-H1-I123-J1-K2. The new species is close to P. alleni , P. araucensis , P. artemisiae , P. coffeae , P. floridensis , P. gutierrezi , P. hippeastri , P. horti , P. jaehni , P. loosi , P. okinawaensis , P. parafloridensis , P. panamaensis , P. platyceriumis , P. pseudocoffeae , P. scribneri , P. speijeri and P. yamagutii but differs from them in several morphological characters. Phylogenetic analyses based on the nearly-full-length 18S rRNA gene, the D2-D3 expansion domains of the 28S rRNA gene and the ITS1-5.8S-ITS2 (ITS) region of the rRNA gene further support the status of the Artemisia population from Vietnam as a distinct new species.