The data in the 2011 Annual Checklist have been provided by 99 databases. Of these 22 are new to the 2011 edition and 22 have been updated over the past year. 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. A brief summary is listed below giving: database short and full names; home page on the web; the author(s) or editor(s); organisation; the group for which data are provided, preceded by its higher classification; and the number of species and infraspecific taxa included in this checklist.

Source database ascending English name of the group Species
3i Cicadellinae: 3i interactive keys and taxonomic databases, subfamily Cicadellinae NEW! Leafhoppers 2,147
3i Typhlocybinae: 3i interactive keys and taxonomic databases, subfamily Typhlocybinae NEW! Leafhoppers 4,450
AFD: Australian Faunal Directory (Pulmonata) Snails and slugs (some groups) 947
AlgaeBase Seaweeds and other algae, including blue-green algae (cyanobacteria) 31,028
AnnonBase: World Species List of Annonaceae Custard apples 2,236
AphidSF: Aphid Species File Aphids and allied groups 4,867
BIOS: Bacteriology Insight Orienting System Bacteria, archaea 6,749
BlattodeaSF: Blattodea Species File Cockroaches 4,431
Brassicaceae species checklist and database Crucifers, mustard or cabbage family 3,778
CCW: Catalogue of Craneflies of the World Craneflies 14,834
ChiloBase: A World Catalogue of Centipedes (Chilopoda) for the web Centipedes 3,146
CIPA: Computer Aided Identification of Phlebotomine sandflies of Americas Phlebotomine sandflies 402
Conifer Database Conifers 619
COOL: Cercopoidea Organised On Line Froghoppers 2,364
CunaxidBase: Family Cunaxidae Database NEW! Cunaxid mites 329
Dothideomycetes NEW! 2,858
Droseraceae Database Sundew family 182
ELPT: Early Land Plants Today - Uniting Taxonomy, Nomenclature & Geography (liverworts and hornworts) Hornworts and liverworts 676
EmbiopteraSF: Embioptera Species File NEW! Webspinners 330
ETI WBD: World Biodiversity Database (Euphausiacea) Krill 86
FishBase Fishes 31,725
FLOW: Fulgoromorpha Lists On the WEB Planthoppers 10,672
FWCrabs: Neotropical Freshwater Crabs Catalogue Freshwater crabs 46
GCC: Global Compositae Checklist Aster or sunflower family 29,649
GloBIS (GART): Global Butterfly Information System Swallowtails and whites 1,635
Glomeromycota Glomeromycota 166
Hexacorals: Hexacorallians of the World Sea anemones 738
ICTV/MSL: International Committee on Taxonomy of Viruses / Master Species List Viruses and subviral agents 2,083
ILDIS World Database of Legumes Legumes 19,949
IOPI Global Plant Checklist Cycads and 6 families of seed plants 24,025
ITIS Bees: World Bee Checklist Bees 20,455
ITIS: The Integrated Taxonomic Information System Wide range of taxa in all kingdoms 136,921
LDL Neuropterida Species of the World Lacewings, antlions, owlflies, fishflies, dobsonflies & snakeflies 6,256
LecyPages: The Lecythidaceae Pages Brazil nut family 311
LepIndex: The Global Lepidoptera Names Index Butterflies and moths 243,006
LHD: Lacistemataceae Holistic Database Waits Numi plant family 28
LIAS: A Global Information System for Lichenized and Non-Lichenized Ascomycetes NEW! Lichens 5,499
MantodeaSF: Mantodea Species File Praying mantids 2,403
MBB: Moss Bug Base Moss bugs 32
Mites GSDs: OlogamasidBase Ologamasid mites 446
Mites GSDs: PhytoseiidBase Phytoseiid mites 2,186
Mites GSDs: RhodacaridBase Rhodacarid mites 145
Mites GSDs: TenuipalpidBase Tenuipalpid mites 887
MOST: Moss TROPICOS Database Mosses 13,365
MOWD: Membracoidea of the World Database NEW! Treehoppers and leafhoppers 15,392 Slime moulds 1,034
NZIB: New Zealand Inventory of Biodiversity Various animalian taxa from New Zealand 4,727
Odonata: Catalogue of the Odonata of the World Dragonflies and damselflies 5,746
OrthopteraSF: Orthoptera Species File Grasshoppers, locusts, katydids, crickets 24,424
Parhost: World Database of Fleas Fleas 2,047
PhasmidaSF: Phasmida Species File Stick and leaf insects 2,959
Phyllachorales Tropical tar-spot fungi 1,372
PlecopteraSF: Plecoptera Species File Stoneflies 3,281
Psyl'list: Psylloidea database Jumping plant lice 2,107
Rhytismatales Tar-spot fungi 507
RJB Geranium: Geranium Taxonomic Information System Cranesbills, geraniums 350
Rotifera Database Rotifers 1,996
Saccharomycetes NEW! Ascomycetous yeast forming fungi 745
SalticidDB: Global Species Database of Salticidae (Araneae) Jumping spiders 5,601
ScaleNet: Systematic Database of the Scale Insects of the World Scale insects 7,090
Scarabs: World Scarabaeidae Database Scarab beetles 29,738
Solanaceae Source Nightshade genus 1,084
Species 2000 additional Common Names for the Catalogue of Life 0
Species Fungorum Fungi; protozoan fungi; chromistan fungi 32,872
SpidCat: The World Spider Catalog Spiders 34,245
SpmWeb: Spider Mites Web NEW! Spider mites 1,265
SysMyr: Systematic Myriapod Database Diplopods, pauropods and symphylans 10,107
Systema Dipterorum Flies, mosquitoes, bots, midges and gnats 138,935
Taxapad Ichneumonoidea Ichneumonid and braconid wasps 42,372
TicksBase Ticks 869
TIGR Reptile Database Reptiles 8,656
Tineidae NHM: Global Taxonomic Database of Tineidae (Lepidoptera) Clothes-moths 2,340
TITAN: Cerambycidae database Longhorn beetles, timber beetles 31,408
Trichomycetes Fungi associated with Arthropods 312
UCD: Universal Chalcidoidea Database Chalcidoid wasps 19,847
URMO: UNESCO-IOC Register of Marine Organisms Many groups of marine invertebrates and chordates 16,743
WCSP: World Checklist of Selected Plant Families 99 families of seed plants 106,005
World Gracillariidae: Global Taxonomic Database of Gracillariidae Gracillariid moths 1,851
WoRMS Asteroidea: World Asteroidea Database NEW! Starfish or sea stars 1,917
WoRMS Bochusacea: World List of Bochusacea NEW! 5
WoRMS Brachiopoda & Phoronida: Brachiopoda & Phoronida World Databases Lamp-shells and horseshoe worms 422
WoRMS Brachypoda: World List of Brachypoda NEW! Brachypods 12
WoRMS Bryozoa: World Marine Bryozoa Database NEW! Bryozoans, moss animals 5,686
WoRMS Cumacea: Cumacea World Database Cumaceans 1,286
WoRMS Isopoda: World List of Marine, Freshwater and Terrestrial Isopod Crustaceans NEW! Pillbugs, slaters and woodlice 10,202
WoRMS Mystacocarida: World List of Mystacocarida NEW! Mystacocarids 13
WoRMS Nemertea: World List of Nemertea NEW! Ribbon worms 1,345
WoRMS Oligochaeta: World List of Marine Oligochaeta NEW! Earth worms, oligochaetes 914
WoRMS Ophiuroidea: World Ophiuroidea Database Brittle stars and basket stars 2,152
WoRMS Polychaeta: World List of Polychaeta NEW! Bristle worms 11,635
WoRMS Porifera: World Porifera Database Sponges 8,215
WoRMS Proseriata and Kalyptorhynchia: World database of Proseriata & Kalyptorhynchia Freeliving flatworms 732
WoRMS Remipedia: World Remipedia Database NEW! Remipedes 24
WoRMS Tantulocarida: World List of Tantulocarida NEW! Tantulocaridans 35
WoRMS Thermosbaenacea: World List of Thermosbaenacea NEW! Hot-springs shrimps 35
WoRMS Xenoturbellida NEW! 2
WTaxa: Electronic Catalogue of Weevil names (Curculionoidea) Weevils 98,412
Xylariaceae: Home of the Xylariaceae Fungi associated with dead wood 308
ZOBODAT: Zoological-Botanical Database (Vespoidea) Vespid wasps 5,972
Zygomycetes Pin moulds and related fungi 786