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
Integrated Taxonomic Information System (ITIS)
view in classification
BOLDS images II Genus
BOLDS resource for species-level taxa Genus
Benedetti et al, 2015 Genus
Draft Checklist of the Nonmarine Arthropods of Alaska Genus
view in classification
Global Biotic Interactions Genus Import Import Genus
BOLDS resource for higher-level taxa
NCBI Taxonomy
view in classification
NMNH Invertebrate Zoology resource Genus
OBIS Environmental Information
  • Pseudocalanus Boeck, 1872
OBIS depth range resource Genus
SPIRE resource
Sloan-CoML NameLink Project
  • Pseudocalanus
Smithsonian type specimen data Genus
Arctic Register of Marine Species Genus
  • Pseudocalanus


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