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.

Paleobiology Database

Name Relationship
Spheniscidae Bonaparte 1831 Preferred
Chubutodyptes Simpson 1970 Synonym
Paraspheniscus Ameghino 1905
Pseudospheniscus Ameghino 1905
Treleudytes Ameghino, 1905
Perispheniscus Ameghino 1905
Eosphaeniscus Wiman 1905
Metancylornis Ameghino 1905
Isotremornis Ameghino 1905
Notodyptes Marples 1953
Pachypteryx Wiman 1905


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