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.


Name Relationship
Dugesia gonocephala (Dugès, 1830) Preferred
?Planaria trigonocephala nom. nud. Böhmig, 1883 Synonym

Continenticola Classification

Name Relationship
Dugesia gonocephala (Dugès, 1830) Preferred
Planaria gonocephala Dugès, 1830 Synonym
Euplanaria gonocephala Hesse, 1897
Dugesia (Dugesia) gonocephala Ball, 1974a

Species 2000 & ITIS Catalogue of Life: April 2013

Name Relationship
Dugesia gonocephala (Duges, 1830) Preferred
Euplanaria transcaucasica Livanov, 1951
Euplanaria taurocaucasica Livanov, 1951
Planaria sagitta Schmidt, 1861

NCBI Taxonomy

Name Relationship
Dugesia gonocephala Preferred
Dugesia gonocephala s. str. Equivalent name


EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

To request an improvement, please leave a comment on the page. Thank you!