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
Inventaire National du Patrimoine Naturel Species
DiscoverLife map resource
  • Aratus pisonii
EOL Group on Flickr
Freshwater and Marine Image Bank, University Libraries, U Washington
Indian River Lagoon Species resource
  • Aratus pisonii H. Milne Edwards 1837 Import
Integrated Taxonomic Information System (ITIS)
view in classification
BOLDS resource for species-level taxa
Inventaire National du Patrimoine Naturel Species
NCBI Taxonomy
view in classification
NatureServe resource Species
OBIS Environmental Information
  • Aratus pisonii (H. Milne-Edwards, 1837)
OBIS depth range resource
CIEE Tropical Ecology and Conservation Program Spring 2013
Wikimedia Commons
iNaturalist Images Species


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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