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
Feresa attenuata Gray, 1874 Preferred
Globiocephalus intermedius (Gray 1827) Heterotypic synonym
Orca intermedia (Gray 1827)
Orca (Feresa) intermedia (Gray 1827)
Delphinus intermedius Gray 1827
Feresa intermedia (Gray 1827)
Feresa occulta Jones and Packard, 1956

South African Vertebrates

Name Relationship
Feresa attenuata Gray, 1875 Preferred
Feresa occulta Jones and Packard, 1956 Synonym

Species 2000 & ITIS Catalogue of Life: April 2013

Name Relationship
Feresa attenuata Gray, 1874 Preferred
Delphinus intermedius Gray 1827
Feresa occulta Jones and Packard, 1956

Integrated Taxonomic Information System (ITIS)

Name Relationship
Feresa attenuata Gray, 1874 Preferred
Delphinus intermedius Gray 1827 Junior homonym
Feresa occulta Jones and Packard, 1956 Unnecessary replacement

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