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
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Class
IUCN Red List
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Class
Anage Data Class
Animal Diversity Web Descriptions Class
AquaMaps Resource Class
AskNature Class
BOLDS resource for higher-level taxa
BOLDS resource for higher-level taxa
BOLDS images II Class
BOLDS resource for species-level taxa Class
EOL hotlist Scratchpad Class
  • Cephalaspidomorphi
Environments
Environments Class
IRMNG
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Class
Fairbairn, 2013 Class
  • Cephalaspidomorphi
FishBase
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Class
Fishes resource Class
Global Biotic Interactions Class
Gulf of Maine Area CoML resource Class
IUCN Red List Class
AnAge database Class
BioLib.cz Import
Initial Tree of Life web Import
  • Hyperoartia
Integrated Taxonomic Information System (ITIS)
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Class
Inventaire National du Patrimoine Naturel Class
MarLIN resource Class
NCBI Taxonomy
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OBIS depth range resource Class
OEB130_2010 Class
Paleobiology Database
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Class
Monthly ARKive text import Class
IUCN Structured Data Class
Tree of Life web project
  • Hyperoartia
World Register of Marine Species (WoRMS)
view in classification
Class
Wikimedia Commons
Wikimedia Commons
Wikipedia
Wikipedia Class
Wikipedia
Zootaxa via Plazi Class
iNaturalist Images Class

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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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