The data in current edition of the Catalogue of Life have been provided by 132 databases. 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.

Database Qualifiers
In the Catalogue of Life we introduce "Database Qualifiers" which shown in the interface. Qualifiers give users a quick guide to the reliability of presented data. Qualifiers have been given by authors/editors of each database and appear on the Database Details page, and alongside, with the database name on each Species Details page. Qualifiers reflect data reliability in the Catalogue of Life only, and are not applicable to the original view of the database throught its own website. Qualifiers include:

• Geographic Coverage (values G for "Global" and R for "Regional")
• Taxonomic Completeness (values 1 - 100%)
• Checklist Confidence (values , see below for details)
Caution! This data set does not contain a scrutinised taxonomic checklist, and in parts may be a list of names only. However, as the only available resource at the time, it was included in the Catalogue of Life to fill temporarily a major gap. See database abstract for more details.
Caution! This data set is a scrutinised taxonomic checklist, but is incomplete and at an early stage of its development. See database abstract for more details.
This is a well-scrutinised taxonomic checklist, but it is restricted to a subset of species by geography (regional database), or sector of biological discipline (e.g. thematic database in ecological area, conservation, quarantine, pest and disease control, medicine or molecular biology, etc). This data set was included in the Catalogue of Life to fill temporarily gaps at lower levels of the taxonomic classification (e.g. species, genera). See database abstract for more details.
This is a nearly complete and fully scrutinised taxonomic checklist with a good quality of expertise at the current stage of its development.
This is a complete and fully scrutinised taxonomic checklist for an entire taxon with a high quality of expertise and frequent updates, which covers nearly all known species diversity in the taxon worldwide.

Source database ascending English name of the group Species
3i Cicadellinae: 3i interactive keys and taxonomic databases, subfamily Cicadellinae Leafhoppers 2,137
3i Typhlocybinae: 3i interactive keys and taxonomic databases, subfamily Typhlocybinae Leafhoppers 4,508
AFD: Australian Faunal Directory (Pulmonata) Snails and slugs (some groups) 880
AnnonBase: Annonaceae GSD Custard apples 2,512
AphidSF: Aphid Species File UPDATED! Aphids and allied groups 5,117
BdelloideaBase: Bdellid & Cunaxid Databases UPDATED! Bdellid and cunaxid mites 593
BIOS: Bacteriology Insight Orienting System Bacteria, archaea 6,749
BlattodeaSF: Blattodea Species File UPDATED! Cockroaches 4,510
Brassicaceae species checklist and database Crucifers, mustard or cabbage family 3,778
Catalogue of Life China NEW! Various taxa from China 15,845
CCW: Catalogue of Craneflies of the World Craneflies 14,833
ChenoBase: Chenopodiaceae GSD Goosefoot family 769
ChiloBase: A World Catalogue of Centipedes (Chilopoda) for the web Centipedes 3,146
CilCat: The World Ciliate Catalog Ciliates 8,699
CIPA: Computer Aided Identification of Phlebotomine sandflies of Americas Phlebotomine sandflies 396
Conifer Database Conifers 614
COOL: Cercopoidea Organised On Line Froghoppers 2,461
CoreoideaSF: Coreoidea Species File NEW! Leatherbugs 3,054
Dothideomycetes 2,858
Droseraceae Database Sundew family 182
EbenaBase: Ebenaceae GSD Ebony family 411
ELPT: Early Land Plants Today - Uniting Taxonomy, Nomenclature & Geography (liverworts and hornworts) Hornworts and liverworts 824
EmbiopteraSF: Embioptera Species File UPDATED! Webspinners 391
ETI WBD: World Biodiversity Database (Euphausiacea) Krill 86
FADA Bivalvia: World checklist of freshwater Bivalvia species NEW! Bivalves 1,127
FADA Ephemeroptera: World checklist of freshwater Ephemeroptera species NEW! Mayflies 3,341
FADA Nematomorpha: World checklist of freshwater Nematomorpha species NEW! Freshwater hairworms 356
FADA Rotifera: Annotated checklist of the rotifers (Phylum Rotifera) UPDATED! Rotifers 2,014
FADA Turbellaria: World checklist of freshwater Turbellaria species NEW! Planarians 1,449
FishBase UPDATED! Fishes 32,340
FLOW: Fulgoromorpha Lists On the WEB Planthoppers 11,719
GCC: Global Compositae Checklist UPDATED! Aster or sunflower family 33,294
GloBIS (GART): Global Butterfly Information System UPDATED! Swallowtails and whites 1,662
Glomeromycota Glomeromycota 166
Hexacorals: Hexacorallians of the World Sea anemones 738
HymIS Rhopalosomatidae: Hymenoptera Information System, Rhopalosomatidae of the world NEW! 71
ICTV/MSL: International Committee on Taxonomy of Viruses / Master Species List UPDATED! Viruses and subviral agents 2,480
ILDIS World Database of Legumes UPDATED! Legumes 19,999
IOPI Global Plant Checklist Cycads and 6 families of seed plants 23,629
ITIS Bees: World Bee Checklist Bees 20,455
ITIS Global: The Integrated Taxonomic Information System Wide range of global taxonomic checlists of different taxa 79,516
ITIS Regional: The Integrated Taxonomic Information System Wide range of taxa in all kingdoms 63,023
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 UPDATED! Butterflies and moths 143,129
LHD: Lacistemataceae Holistic Database Waits Numi plant family 28
LIAS: A Global Information System for Lichenized and Non-Lichenized Ascomycetes UPDATED! Lichens 8,702
MantodeaSF: Mantodea Species File UPDATED! Praying mantids 2,424
MBB: Moss Bug Base Moss bugs 32
MELnet: Melastomataceae.Net UPDATED! Melastomes 4,743
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
MolluscaFW: World Checklist of Freshwater Mollusca NEW! Fresh water gastropods 3,767
MOST: Moss TROPICOS Database Mosses 13,365
MOWD: Membracoidea of the World Database Treehoppers and leafhoppers 15,387 Slime moulds 1,092
NZIB: New Zealand Inventory of Biodiversity Various animalian taxa from New Zealand 2,979
Odonata: Global Species Database Odonata Dragonflies and damselflies 5,912
OrthopteraSF: Orthoptera Species File UPDATED! Grasshoppers, locusts, katydids, crickets 25,205
Parhost: World Database of Fleas Fleas 2,047
PhasmidaSF: Phasmida Species File UPDATED! Stick and leaf insects 3,046
Phyllachorales Tropical tar-spot fungi 1,372
PlecopteraSF: Plecoptera Species File UPDATED! Stoneflies 3,491
PsocodeaSF: Psocodea Species File NEW! Bark lices & parasitic lices 5,902
Psyl'list: Psylloidea database Jumping plant lice 2,429
Rhytismatales Tar-spot fungi 507
RJB Geranium: Geranium Taxonomic Information System Cranesbills, geraniums 345
Saccharomycetes 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 UPDATED! Scarab beetles 34,744
Solanaceae Source Nightshade genus 1,083
Species 2000 additional Common Names for the Catalogue of Life 0
Species Fungorum Fungi; protozoan fungi; chromistan fungi 31,777
SpidCat via ITIS: The World Spider Catalog UPDATED! Spiders 35,787
SpmWeb: Spider Mites Web Spider mites 1,265
Strepsiptera Database: Global Strepsiptera Database UPDATED! Twisted-winged parasites 601
SysMyr: Systematic Myriapod Database UPDATED! Diplopods, pauropods and symphylans 12,615
Systema Dipterorum Flies, mosquitoes, bots, midges and gnats 138,934
Taxapad Ichneumonoidea Ichneumonid and braconid wasps 42,370
TicksBase Ticks 867
TIGR Reptile Database Reptiles 8,656
Tineidae NHM: Global Taxonomic Database of Tineidae (Lepidoptera) Clothes-moths 2,443
TITAN: Cerambycidae database Longhorn beetles, timber beetles 33,140
Trichomycetes Fungi associated with Arthropods 312
UCD: Universal Chalcidoidea Database Chalcidoid wasps 19,847
Umbellifers: World Umbellifer Database Imbellifers, carrot or parsley family 9,330
URMO: UNESCO-IOC Register of Marine Organisms Many groups of marine invertebrates and chordates 10,383
WCSP: World Checklist of Selected Plant Families 99 families of seed plants 106,715
World Gracillariidae: Global Taxonomic Database of Gracillariidae Gracillariid moths 1,855
WoRMS Asteroidea: World Asteroidea database UPDATED! Starfish or sea stars 1,859
WoRMS Bochusacea: World List of Bochusacea UPDATED! 5
WoRMS Brachiopoda: World Brachiopoda database UPDATED! Lamp-shells 392
WoRMS Brachypoda: World List of Brachypoda UPDATED! Brachypods 12
WoRMS Brachyura: World List of marine Brachyura UPDATED! Crabs 7,032
WoRMS Bryozoa: World List of Bryozoa UPDATED! Bryozoans, moss animals 5,588
WoRMS Cestoda: World List of Cestoda NEW! Tapeworms 1,583
WoRMS Chaetognatha: World list of Chaetognatha UPDATED! Arrow worms 130
WoRMS Cumacea: World Cumacea database UPDATED! Cumaceans or hooded shrimps 1,529
WoRMS Echinoidea: World Echinoidea Database UPDATED! Sea urchins 996
WoRMS Gastrotricha: World Gastrotricha Database NEW! Gastrotrichs or hairy backs 847
WoRMS Gnathostomulida: World list of Gnathostomulida NEW! Gnathostomulids or jaw worms 97
WoRMS Holothuroidea: World List of Holothuroidea UPDATED! Sea cucumbers 1,678
WoRMS Hydrozoa: World Hydrozoa database UPDATED! Hydroids 3,518
WoRMS Isopoda: World Marine, Freshwater and Terrestrial Isopod Crustaceans database UPDATED! Pillbugs, slaters and woodlice 10,248
WoRMS Leptostraca: World List of Leptostraca UPDATED! Leptostraca 53
WoRMS Mollusca: World Marine Mollusca database NEW! Marine molluscs 35,033
WoRMS Monogenea: World list of Monogenea NEW! Monogenean flatworms 1,868
WoRMS Mystacocarida: World List of Mystacocarida UPDATED! Mystacocarids 13
WoRMS Myxozoa: World list of Myxozoa NEW! Myxozoans 194
WoRMS Nemertea: World Nemertea database UPDATED! Ribbon worms 1,217
WoRMS Oligochaeta: World List of Marine Oligochaeta UPDATED! Earthworms, oligochaetes 912
WoRMS Ophiuroidea: World Ophiuroidea database UPDATED! Brittle stars and basket stars 2,071
WoRMS Phoronida: World Phoronida database UPDATED! Horseshoe worms 16
WoRMS Placozoa: World Placozoa Database NEW! Placozoans or pancake animals 1
WoRMS Polychaeta: World Polychaeta database UPDATED! Bristle worms 11,154
WoRMS Polycystina: World list of Polycystina (Radiolaria) UPDATED! Polycystines (radiolarian protists) 416
WoRMS Porifera: World Porifera database UPDATED! Sponges 8,387
WoRMS Priapulida: World list of Priapulida NEW! Priapulid worms or penis worms 19
WoRMS Proseriata - Kalyptorhynchia: World database of Proseriata and Kalyptorhynchia UPDATED! Freeliving flatworms 1,011
WoRMS Remipedia: World Remipedia Database UPDATED! Remipedes 24
WoRMS Scaphopoda: World List of Scaphopoda UPDATED! Tusk shells 577
WoRMS Tanaidacea: World List of Tanaidacea UPDATED! Tanaids 1,187
WoRMS Tantulocarida: World List of Tantulocarida UPDATED! Tantulocaridans 35
WoRMS Thermosbaenacea: World List of Thermosbaenacea UPDATED! Hot-springs shrimps 35
WoRMS Trematoda: World list of Trematoda NEW! Flukes 1,785
WoRMS Xenoturbellida: World List of Xenoturbellida UPDATED! Xenoturbellids 2
WTaxa: Electronic Catalogue of Weevil names (Curculionoidea) Weevils 98,262
Xylariaceae: Home of the Xylariaceae Fungi associated with dead wood 308
ZOBODAT: Zoological-Botanical Database (Vespoidea) Vespid wasps 6,205
Zygomycetes Pin moulds and related fungi 786