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Family Hydrobiidae Stimpson, 1865 s.l. Remarks: The Hydrobiidae, as currently understood, have originated not before the Paleocene around 60 Myr ago according to molecular analyses (Delicado et al. 2023). Thus, it is questionable in which group Cretaceous “hydrobiid-looking” fossils should be assigned to. Here, we use a broad concept of Hydrobiidae, acknowledging the uncertain placement of the taxa.
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Páll‐Gergely et al. (2026) studied this question.
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