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
Dugongidae Gray, 1821 Preferred
Pugmeodon Kaup 1838 Synonym
Hesperosiren Simpson 1932
Halianassa Studer, 1887
Felsinotherium Capellini 1872
Thalattosiren Sickenberg 1928
Dungugus Schinz 1824-28
Fucotherium Kaup 1840
Udobaenus Sundevall 1860
Halianassa Meyer 1838
Dugungus Tiedemann 1808
Dugongidus Gray 1821
Rityna Lesson 1842
Felsinotherium Capellini 1865
Trachytherium Gervais 1849
Manatherium Hartlaub 1886
Metaxitherium Dilg 1909
Haplosiren Kretzoi 1951
Ponthotherium Pictet 1853
Halibutherium Gloger 1841
Halinassa Meyer 1840
Crassitherium van Beneden 1871
Archaeosiren Abel, 1913
Masrisiren Kretzoi, 1941
Pygmaeodon Giebel, 1847
Furcotherium Simpson, 1932
Halysiren Kretzoi, 1941
Manati Steller 1774
Platystomus Fischer de Waldheim 1803
Halicore Illiger 1811
Rhytina Berthold in Latreille, 1827
Stellera Bowdich 1821
Halicorne Geoffroy & Cuvier 1821
Pygmodon Agassiz 1846
Halycore Bonaparte 1831
Cheirotherium Bruno 1839
Rytina Illiger 1811
Distomus Trouessart 1898
Halytherium Kaup 1838
Dystomus Fischer-Waldheim 1813
Rhytine Burmeister 1837
Amblychilus Fischer 1814
Eotherium Owen 1875
Hydromalis Allen 1880
Rhytiodus Roger 1887
Halicon Cuvier 1829
Sirene Link 1794
Manati Zimmermann 1780
Pontotherium Kaup 1840
Halicora Fleming 1822
Odobenus Rafinesque 1815
Haligyna Billberg 1827
Halichore Serres, Dubrueil & Jeanjean, 1839
Stellerus Desmarest 1822
Nepus Fischer 1814
Halicone Goldfuss 1820

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