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
Pseudorca crassidens (Owen, 1846) Preferred
Orca crassidens (Owen 1846) Valid
Phocaena crassidens Owen, 1846
Delphinus (Phocaena) crassidens (Owen 1846)
Pseudorca meridionalis (Flower 1864) Heterotypic synonym
Orca (Pseudorca) meridionalis Flower 1864
Orca meridionalis Flower 1864
Globicephalus grayi Burmeister 1869
Pseudorca grayi (Burmeister 1869)
Pseudorca mediterranea Giglioli, 1882
Orca destructor Cope, 1866

South African Vertebrates

Name Relationship
Pseudorca crassidens (Owen, 1846) Preferred
Orca destructor Cope, 1866 Synonym
Orcinus nanus Mikhalev & Ivashin 1981
Delphinus intermedius Gray 1827
Orca meridionalis Flower, 1865
Pseudorca meridionalis (Flower, 1865)

NCBI Taxonomy

Name Relationship
Pseudorca crassidens Preferred
Pseudoorca crassidens

Species 2000 & ITIS Catalogue of Life: April 2013

Name Relationship
Pseudorca crassidens (Owen, 1846) Preferred
Orca destructor Cope, 1866
Pseudorca meridionalis (Flower, 1865)
Phocaena crassidens Owen, 1846
Orca meridionalis Flower, 1865

Integrated Taxonomic Information System (ITIS)

Name Relationship
Pseudorca crassidens (Owen, 1846) Preferred
Orca destructor Cope, 1866 Junior synonym
Pseudorca meridionalis (Flower, 1865)
Phocaena crassidens Owen, 1846 Original name/combination
Orca meridionalis Flower, 1865

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