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
Mesoplodon layardii (Gray, 1865) Preferred
Mesoplodon (Dolichodon) layardi (Gray 1865) Valid
Mesoplodon layardi (Gray, 1865)
Dolichodon layardii (Gray, 1865)
Ziphius layardii Gray, 1865
Mesoplodon longirostris Gray, 1873 Heterotypic synonym
Mesoplodon guntheri Krefft, 1871

South African Vertebrates

Name Relationship
Mesoplodon layardii (Gray, 1865) Preferred
Phatages hedenborgii Fitzinger, 1872 Synonym
Mesoplodon thomsoni Ogilby, 1892
Mesoplodon guntheri Krefft, 1871
Mesoplodon floweri von Haast, 1876
Ziphius layardii Gray, 1865
Mesoplodon longirostris Gray, 1873

Species 2000 & ITIS Catalogue of Life: April 2013

Name Relationship
Mesoplodon layardii (Gray, 1865) Preferred
Mesoplodon floweri von Haast, 1876
Mesoplodon longirostris Gray, 1873
Mesoplodon thomsoni Ogilby, 1892
Ziphius layardii Gray, 1865
Mesoplodon guntheri Krefft, 1871

Integrated Taxonomic Information System (ITIS)

Name Relationship
Mesoplodon layardii (Gray, 1865) Preferred
Mesoplodon floweri von Haast, 1876 Junior synonym
Mesoplodon longirostris Gray, 1873
Mesoplodon thomsoni Ogilby, 1892 Other, see comments
Ziphius layardii Gray, 1865 Original name/combination
Mesoplodon guntheri Krefft, 1871

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