Phylogenetic analyses reveal new evolutionary groups of marna- and nora-like viruses in freshwater ponds, suggesting greater viral diversity.
We report near-complete genome sequences of a marna-like virus and a nora-like virus identified from freshwater pond metatranscriptomes in Japan. Phylogenetic analyses show that both viruses form deep, isolated lineages within the order Picornavirales, suggesting previously unrecognized evolutionary groups and expanding the known diversity of picorna-like viruses.
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Iida et al. (2026) studied this question.
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