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
Integrated Taxonomic Information System (ITIS)
view in classification
AquaMaps Resource Order
BOLDS resource for higher-level taxa
BOLDS images II Order
BOLDS resource for species-level taxa Order
EOL Group on Flickr Order
Encyclopedia of Marine Life of Britain and Ireland Resource Order
view in classification
GBIF national node classification resource: Germany Order
GBIF national node type records: Netherlands Order
Global Biotic Interactions Order Import Order Import
BOLDS resource for higher-level taxa
MarLIN resource Order
McClain Bivalve Sizes Order
NCBI Taxonomy
view in classification
NatureServe resource Order
Ocean Genome Resource- genomic DNA available Order
Invertebrates of the Salish Sea Order
Smithsonian type specimen data Order
Taxonomic Hierarchy of COL-China 2012
view in classification
Wikipedia Order
eBivalvia contents
  • Pholadomyoida
iNaturalist Images Order


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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