Insights into the genetic diversity and species distribution of Oswaldocruzia nematodes (Trichostrongylida: Molineidae) in Europe: apparent absence of geographic and population structuring in amphibians
Kristián Gulyás, Monika Balogová, Natália Pipová, Petr Papežík, Dalibor Uhrovič, Peter Mikulíček, Tímea Brázová, Michal Benovics
TL;DR
This study explores the genetic diversity of Oswaldocruzia nematodes in European amphibians, revealing contrasting patterns between two species.
Contribution
The study identifies contrasting genetic diversity patterns in two Oswaldocruzia species with differing host specificity in amphibians.
Findings
Oswaldocruzia filiformis shows high haplotype diversity and low genetic structuring across hosts and regions.
Oswaldocruzia ukrainae exhibits low genetic diversity and is closely associated with a single host species.
The findings expand the known geographic range of O. filiformis into the Balkans.
Abstract
The genus Oswaldocruzia represents a taxonomically diverse group of nematodes with global distribution. Although Oswaldocruzia species are widespread and exhibit a remarkably wide host range in some species, their genetic diversity and biogeographic patterns remain poorly understood. This study investigated the genetic variability and distribution of Oswaldocruzia spp. in nine anuran species from the genera Bufo, Bufotes, Pelophylax, and Rana across Central Europe and the Balkans. Two species were identified: Oswaldocruzia filiformis and O. ukrainae, each exhibiting a different range of host associations. Phylogenetic analyses based on mitochondrial COI sequences revealed significant haplotype diversity in the generalist O. filiformis, with low geographic and host-associated genetic structuring. In contrast, O. ukrainae, which is closely associated with Bufotes viridis, exhibited only…
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Taxonomy
TopicsParasite Biology and Host Interactions · Amphibian and Reptile Biology · Primate Behavior and Ecology