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.

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Preferred marks the preferred classification for this taxon.

Recognized By Rank Classification
Species 2000 & ITIS Catalogue of Life: April 2013
view in classification
Family
SPIRE resource
Alaska Fisheries Science Center Family
AnAge database Family
Anage Data Family
Animal Diversity Web Descriptions
Animal Diversity Web Descriptions Family
AquaMaps Resource Family
Arctic Ocean Biodiversity Family
AskNature Family
BOLDS resource for higher-level taxa
BOLDS resource for higher-level taxa
BOLDS images II Family
BOLDS resource for species-level taxa Family
Biopix Family
CalPhotos
  • Phocidae
Conabio Family
Dutch Marine and Coastal Species Encyclopedia
  • Phocidae
EOL Group on Flickr Family
EOL Metrics Family
  • Phocidae
EOL hotlist Scratchpad Family
  • Phocidae
Environments Family
Freshwater and Marine Image Bank, University Libraries, U Washington
GBIF Elevation Data Family
Global Biotic Interactions Family
Global Biotic Interactions Family
IABIN resource Family
IUCN Red List Family
IUCN Red List
view in classification
Family
BioLib.cz Import
BioLib.cz Import Family
Integrated Taxonomic Information System (ITIS)
view in classification
Family
Inventaire National du Patrimoine Naturel Family
Mammal life history Family
Taxonomic Hierarchy of COL-China 2012 Mammalia Family
Mammals Resource Family
MarLIN resource Family
NCBI Taxonomy
view in classification
Family
Natural History Museum Species of the day Family
NatureServe resource Family
North American Mammals Resource Family
NCBI, GGBN, GBIF, BHL, BOLDS data coverage Family
  • Phocidae
OBIS Environmental Information
  • Phocidae
OBIS depth range resource Family
Paleobiology Database
view in classification
Family
Monthly ARKive text import Family
Sloan-CoML NameLink Project
  • Phocidae
South African Vertebrates
view in classification
Family
Monthly ARKive text import Family
IUCN Structured Data Family
Taxonomic Hierarchy of COL-China 2012
view in classification
Family
Tree of Life web project
  • Phocidae
World Register of Marine Species (WoRMS)
view in classification
Family
Wikimedia Commons Family
Wikimedia Commons Genus
Wikimedia Commons
Wikipedia
Wikipedia Family
Wikipedia
ZooKeys Family
iNaturalist Images Family

Disclaimer

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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