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
Mammalia Preferred
Chthonoergus Agassiz 1842 Synonym
Chtonoërgus Keyserling & Blasius 1840
Leith-Adamsia Matsumoto 1928
Homorhinocenos Ameghino 1882
Isodactylus Dal Piaz 1927
Tambla-Mastodon Roger 1887
Dupéretia Shikama 1936
Ceto-diodon Jacob 1825
Unaüs Gray, 1821
Muñi-Felis Muñiz 1845
Homorhinoceros Ameghino, 1882
Munefelis Gore 1874
Pachychoerops Kretzoi 1941
Baënomys Matthew & Granger 1925
Petra-Choerus Ritgen 1824
Acerodon Wagner in Schreber, 1839
Xenostylus Goin, Case, Woodburne, Vizcaíno & Reguero, 1999
Homorhinoceros Ameghino, 1889
Zaëdius Lydekker 1894
Laïra Cuvier, 1826
Unaüs Rafinesque 1815
Muñizia Kraglievich 1931
Adiastemus Ameghino 1893

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