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First detection of Psilotrema limosum in muskrat in East Asia and a description of Psilotrema elegans n. sp.

Published online by Cambridge University Press:  10 April 2025

K.A. Kalinina Open the ORCID record for K.A. Kalinina [Opens in a new window] ,
Yu.V. Tatonova ,
V.V. Besprozvannykh  and
M.Yu. Shchelkanov
K.A. Kalinina*
Affiliation:
Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch, Russian Academy of Sciences, pr-t 100-letiya Vladivostoka 159a, Vladivostok 690022, Russia
Yu.V. Tatonova
Affiliation:
Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch, Russian Academy of Sciences, pr-t 100-letiya Vladivostoka 159a, Vladivostok 690022, Russia
V.V. Besprozvannykh
Affiliation:
Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch, Russian Academy of Sciences, pr-t 100-letiya Vladivostoka 159a, Vladivostok 690022, Russia
M.Yu. Shchelkanov
Affiliation:
G.P. Somov Research Institute of Epidemiology and Microbiology, Russian Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing, Selskaya St. 1, Vladivostok 690022, Russia Institute of Life Sciences and Biomedicine, Basic Department of Epidemiology, Microbiology and Parasitology School of Medicine and Life Sciences, Far Eastern Federal University, Vladivostok 690922, Russia
*
Corresponding author: K.A. Kalinina; Email: zzzzssssaaaa28@gmail.com
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Abstract

The East Asian region has seen the first discovery of trematodes of the genus Psilotrema in the muskrat Ondatra zibethicus. When studying the morphology of the trematodes, two morphotypes were identified among individuals of Psilotrema spp., the differences between which at the morphological level are equivalent to those between species. The affiliation of one of these morphotypes with the bird parasite Psilotrema limosum was established based on partial sequences of genes coding for 28S ribosomal RNA, nad1, and cox1 mitochondrial DNA. Based on the analysis of these three markers, we classified individuals with this morphotype as P. limosum, despite some morphological features of worms infecting birds. At the same time, the worms with second morphotype had no interspecies differences based on the first two markers, while the cox1 gene confirmed the separation of these samples on a species level. These trematodes were described as a new species, Psilotrema elegans n. sp., based on both morphological and molecular data.

Keywords

Psilotremamorphology28Snad1cox1
Type
Research Paper
Information
Journal of Helminthology , Volume 99 , 2025 , e50
Copyright
© The Author(s), 2025. Published by Cambridge University Press

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