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I propose merging the article Hydatellaceae into the article Trithuria. The family Hydatellaceae U.Hamann now only consists of the genus Trithuria Hook.f., in which the former genus Hydatella Diels has been included.[1][2][3] To my knowledge, there are currently no further extant or fossil genera, which can be attributed to Hydatellaceae with certainty. There are claims or suggestions of fossil taxa having affinities to Hydatellaceae (e.g., †Archaefructus[4][5] and †Monosulcites[4][6]), but these taxa have not been assigned to Hydatellaceae with certainty. Therefore, as of November 2024, the family Hydatellaceae is monogeneric. The article naming conventions for monotypic taxa state: "A family or order with a single genus is treated at the article for that genus." Therefore, the family article Hydatellaceae should be merged into Trithuria. Conan Wolff (talk) 16:09, 14 November 2024 (UTC)[reply]
I have also added a merge proposal for the order Hydatellales into the article Trithuria, as the order Hydatellales would now also be monogeneric. The information given on the Hydatellales article can be included in section Taxonomy of the Trithuria article. Conan Wolff (talk) 12:06, 15 November 2024 (UTC)[reply]