Ivashko Ya.I.*, Atopkin D.M., Besprozvannykh V.V. 2025. Description of a new trematode species of Parasymphylodora and molecular evidences for asymphylodorine differentiation // Invert. Zool. Vol.22. No.2: 237–246 [in English].
Federal Scientific Center of East Asia Terrestrial Biodiversity, Far Eastern Branch of Russian Academy of Sciences, Vladivostok 690022 Russia.
Yana Ivashko: ivashko.yana@bk.ru ORCID https://orcid.org/0000-0002-9487-5056
Dmitry Atopkin: atop82@gmail.com ORCID https://orcid.org/0000-0001-8417-3424
Vladimir Besprozvannykh: besproz@biosoil.ru
* Corresponding author
doi: 10.15298/invertzool.22.2.02
ABSTRACT: Trematodes with diagnostic criteria inherent to Asymphylodorinae were found in the intestine of Carassius gibelio from the south of the Russian Far East. Results of 28S rDNA-based phylogenetic analysis showed that the worms belong to Parasymphylodora and are closely related to P. lacustris. The genetic distance value of 4.52±0.71% between these trematodes corresponds to the interspecific differentiation level for Lissorchiidae. Our discovered trematodes differ from both P. lacustris and other Parasymphylodora species based on a number of morphometric criteria. Based on these results, they were accepted as a new species of the genus Parasymphylodora, named P. jugiformis sp.n. The results of the phylogenetic analysis based on 28S rDNA sequence data confirmed the presence of several clades of the generic level within Asymphylodorinae. The molecular characters for the diagnosis of these clades as hypothetical genera are proposed.
KEY WORDS: trematode, intestine parasites, Carassius gibelio, 28S rDNA, taxonomy, nucleotide profiles.