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
NCBI Taxonomy
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SERPENT resource
Animal Diversity Web Descriptions Phylum
Animal Diversity Web Descriptions
Appeltans et al, 2012
AskNature Phylum
  • Nemata
BOLDS resource for higher-level taxa
  • Nematoda
BOLDS resource for higher-level taxa
BOLDS images II Phylum
BOLDS resource for species-level taxa Phylum
BioImages resource Phylum
BioImages resource
EOL Group on Flickr Phylum
EOL Group on Flickr
EOL hotlist Scratchpad Phylum
  • Nematoda
  • Nematoda
Environments Phylum
Environments Phylum
view in classification
FALO Classification Phylum
GBIF national node classification resource: Germany Phylum
GBIF national node type records: France Phylum
GBIF national node type records: Germany Phylum
Global Biotic Interactions Phylum
Global Biotic Interactions Class
Herring, 1987 Phylum
IABIN resource Phylum
INBio resource Phylum Import
Initial Tree of Life web Import
  • Nematoda
Integrated Taxonomic Information System (ITIS)
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Inventaire National du Patrimoine Naturel Phylum
Library of Alexandria
Moorea Biocode
  • Nematoda
AnAge database Phylum
NMNH Invertebrate Zoology resource Phylum
Natural History Museum Species of the day Phylum
OBIS Environmental Information
  • Nematoda incertae sedis
OBIS depth range resource Phylum
OBIS depth range resource Class
Ocean Genome Resource- genomic DNA available
Ocean Genome Resource- genomic DNA available Phylum
Paleobiology Database
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Plazi Treatments Genus
Plazi Treatments Phylum
Anage Data Phylum
SPIRE resource
Sloan-CoML NameLink Project
  • Nematoda
Smithsonian type specimen data Phylum
Species 2000 & ITIS Catalogue of Life: April 2013
view in classification
Taxonomic Hierarchy of COL-China 2012
view in classification
Tree of Life web project
  • Nematoda
Type data from iDigBio Phylum
World Register of Marine Species (WoRMS)
view in classification
Wikimedia Commons
Wikimedia Commons
Wikipedia Phylum
Wikipedia Class
ZooKeys Phylum
Zootaxa via Plazi Phylum


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