Sometimes taxonomists create new names for groups that already have a name. They may do this because they are unaware of the original name, or they may think the organism before them belongs to a different group when in fact it does not. If two or more names are found to apply to the same group, they are considered synonyms. In most cases, the first name takes priority and is considered to be the valid or accepted name. However, there can be exceptions, and it's not always easy to determine which of a series of synonyms should be considered valid or accepted. Here we list the synonyms provided to EOL by our classification partners. We also include other versions of the name that most likely refer to the same group, for example, misspellings in the literature or different variations of the authorship associated with the name.

Preferred marks the preferred name from each source.

IRMNG

Name Relationship
Aetideidae Giesbrecht 1892 Preferred
Pseudaetideus Wolfenden 1903 Synonym
Derjuginia Jashnov 1947
Bryaxis G.O. Sars, 1903
Undinopsis G.O. Sars in Schneider, 1884
Euaetideus G. O. Sars, 1925
Pseudogaetanus Brodski 1950
Autanepsius Wolfenden 1906
Gaëtanus Giesbrecht 1888
Wilsonidius Tanaka 1969
Mesundeuchaeta Wolfenden 1911
Snelliaetideus Vervoort 1949
Gaidius Giesbrecht, 1895
Bradyanus Vanhöffen, 1897
Faroella Wolfenden 1904
Gaïdius Giesbrecht 1895
Bryaxona Strand 1929
Paraetideus Paulsen 1909

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