The data in the 2006 Annual
Checklist have been provided by the databases listed
below. Most datasets include one or more global species
database sectors (GSDs), i.e. datasets being developed
to cover all of the world's species in a particular
group of organisms. A few datasets provide regional
information for groups not yet covered globally. The
datasets result from collaboration and editing by
many expert taxonomists, whose names are found in
the datasets themselves. For each database, a brief
summary is listed in the following pages and inside
the database: database short and full names; home
page on the web; the author(s) or editor(s); organisation;
the group for which data are provided, all preceded
by its higher classification; and the number of species
and infraspecific taxa included in this Annual Checklist.
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 | Snails and slugs (some groups) |  | 978 |  | Show details |
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 | Seaweeds and other algae, including blue-green algae (cyanobacteria); seagrasses |  | 38,361 |  | Show details |
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 | Flies, mosquitoes, bots, midges and gnats |  | 131,152 |  | Show details |
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 | Bacteria, Archaea |  | 6,995 |  | Show details |
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 | Craneflies |  | 16,786 |  | Show details |
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 | Phlebotomine sandflies |  | 419 |  | Show details |
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 | Reptiles |  | 12,740 |  | Show details |
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 | Krill |  | 86 |  | Show details |
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 | Fishes |  | 29,181 |  | Show details |
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 | Planthoppers |  | 821 |  | Show details |
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 | Glomeromycota |  | 160 |  | Show details |
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 | Sea anemones |  | 738 |  | Show details |
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 | Viruses and subviral agents |  | 5,811 |  | Show details |
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 | Legumes |  | 25,055 |  | Show details |
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 | Cycads and 6 flowering plant families |  | 34,450 |  | Show details |
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 | Diverse groups of animals, plants, chromista and protozoans (mainly from N America) |  | 161,071 |  | Show details |
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 | Butterflies and moths |  | 260,426 |  | Show details |
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 | Mosses |  | 13,370 |  | Show details |
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 | Dragonflies and damselflies |  | 6,548 |  | Show details |
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 | Grasshoppers, locusts, katydids, crickets |  | 25,315 |  | Show details |
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 | Fleas |  | 2,892 |  | Show details |
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 | Tropical tar-spot fungi |  | 1,353 |  | Show details |
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 | 10 flowering plant families |  | 19,383 |  | Show details |
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 | Fungi on conifers (especially) |  | 438 |  | Show details |
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 | Scale insects |  | 7,190 |  | Show details |
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 | Scarab beetles |  | 18,233 |  | Show details |
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 | Fungi; Protozoan fungi; Chromistan fungi |  | 32,119 |  | Show details |
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 | Spiders |  | 38,630 |  | Show details |
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 | Ticks |  | 889 |  | Show details |
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 | Clothes-moths |  | 2,346 |  | Show details |
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 | Longicorn beetles, timber beetles |  | 27,136 |  | Show details |
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 | Fungi associated with Arthropods |  | 229 |  | Show details |
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 | Chalcidoid wasps |  | 7,757 |  | Show details |
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 | Marine invertebrates and chordates |  | 14,576 |  | Show details |
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 | Fungi associated with dead wood |  | 279 |  | Show details |
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 | Vespid wasps |  | 8,977 |  | Show details |
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 | Zygomycetes |  | 534 |  | Show details |
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