Scientists aim to describe a single 'tree of life' that reflects the evolutionary relationships of living things. However, evolutionary relationships are a matter of ongoing discovery, and there are different opinions about how living things should be grouped and named. EOL reflects these differences by supporting several different scientific 'classifications'. Some species have been named more than once. Such duplicates are listed under synonyms. EOL also provides support for common names which may vary across regions as well as languages.

Preferred marks the preferred classification for this taxon.

Recognized By Rank Classification
Species 2000 & ITIS Catalogue of Life: April 2013
view in classification
GBIF national node type records: Netherlands Species
AnAge database
Anage Data
Animal Diversity Web Descriptions
BOLDS images II Species
BOLDS resource for species-level taxa
  • Proteus anguinus
DiscoverLife map resource
  • Proteus anguinus
EOL Group on Flickr
Global Biotic Interactions Species
IUCN Red List
IUCN Red List
view in classification Import
Integrated Taxonomic Information System (ITIS)
view in classification
NCBI Taxonomy
view in classification
Monthly ARKive text import
IUCN Structured Data outlinks
  • Proteus anguinus
Wikimedia Commons


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.

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