By Region: Antarctica, Asia, Atlantic Ocean, Australasia, Caribbean, Central America, Europe, Global, North America, South America

By Systematic Position: Ascomycota (incl. lichens), Basidiomycota, Chromista, Conidial fungi, Myxomycota, Zygomycota

GLOBAL

Morphing Mushroom Identifier (Mycokey) [English]
DEEMY (DEtermination of EctoMYcorrhizae) [English]

ANTARCTICA
Lichens of Victoria Land [English]

ASIA

General

Lichen Determination Keys: Common Malesian Lichen Genera [English]

China

Key to the Yellow Cetrarioid Lichens in the Tibetan Area [Estonia, English]

Iran

Lichen Determination Keys: Lichens of Iran [English]

Thailand

A key to the parmelioid lichens of northern Thailand [English]

ATLANTIC OCEAN

General

Bestimmungsschlüssel für die Parmeliaceae (Blattflechten) von Laurimacaronesien [Key to the Parmeliaceae (Foliose Lichens) of Macaronesia, German]

AUSTRALASIA

Australia

Key to the Genera of Australian Macrolichens [English]
Key to the Genera of Australian Lichens: Apothecial Crusts [English]
Key to the Genera of Crustose Pyrenocarpous Lichens in Australia [English]

New Zealand

Key to Lophodermium [English]
Key to Rhytismataceae Genera [English]
Rhytismataceae by Host [English]

CARIBBEAN

General

Key and Literature Guide to the Genera of Lichenized Fungi (Lichens) in the Neotropics [English]
Lichen Determination Keys: Neotropical Genera [English]
Lichen Determination Keys: Neotropical Hypotrachyna [English]
Lichen Determination Keys: Neotropical Parmotrema [English]
Lichen Determination Keys: Neotropical Stereocaulon [English]

CENTRAL AMERICA

General

Key and Literature Guide to the Genera of Lichenized Fungi (Lichens) in the Neotropics [English]
Lichen Determination Keys: Neotropical Genera [English]
Lichen Determination Keys: Neotropical Hypotrachyna [English]
Lichen Determination Keys: Neotropical Parmotrema [English]
Lichen Determination Keys: Neotropical Stereocaulon [English]

Costa Rica

Amanita found in the Cordillera Talamanca, Costa Rica, and some other regions of Central America [English]

EUROPE

General
Keys to Cortinarius Subgenus Dermocybe in Nordic Countries [English]
Leccinum Revisited [English]
Lichen Determination Keys: Pertusaria in Europe & the Mediterranean [English]

Eire

Key to Parmelia of Great Britain & Ireland [English]

Estonia

The epiphytic macrolichens of Estonia – An illustrated guide [English]

Germany

Key to Inocybe [German]

Italy

Chiave interattiva per l'identificazione dei piu comuni licheni della Provincia di Mantova (interactive key to the common lichens in Mantova province) [Italian]
Chiave semplificata ai piu comuni licheni epifiti del Passo Pura (Alpi Carniche) (simplified key to the common epiphyte lichens in Passo Pura, Carnic Alps) [Italian]

Netherlands

Norway

Key to Mycenas of Norway [English]
Keys to Genera & Species of Caliciales in Norway [English]

Portugal

Materiali per una chiave ai macrolicheni epifiti del Portogallo (key to epiphyte lichens of Portugal) [Italian]

Spain

Los macroliquenes epifitos de Espana. Una guia interactiva (Epiphyte Macrolichens of Spain. An illustrated guide) [Spanish]

UK

British Mycological Society Keys for Macrofungi [English]
Illustrated Guide to Lichens on Twigs [English]
Key to Geoglossum [UK, English]
Key to Parmelia of Great Britain & Ireland [English]

Ukraine

Fungi of Ukraine: Rhytismatales [English]

NORTH AMERICA

General

Amanita Species of Section Phalloideae from North America Having Membranous, Limbate to Saccate Volvas [English]
Ed's E-Key, a User-friendly Point & Click Key to the Mushrooms of North America [English]
Key to North American Armillaria Species [English]
Systematic Studies in Discomycetes: Pezizales [note: keys unavailable, English]

Canada

Draft Keys to Species of Amanita Occurring in California, Idaho, Oregon & Washington USA, and in Neighbouring Regions of Canada and Mexico [English]
Draft Keys to Species of Amanita Occurring in Northeastern USA and Eastern Canada [English]
Key to North American Armillaria species [English]
Key to Collybia Sensu Stricto of the Northeast United States & Canada [English]
Key to Gymnopus of the Northeast United States & Canada [English]
Key to Rhodocollybia of the Northeast United States & Canada [English]
Key to Tricholoma of Québec [English]
Lichens of British Columbia, Illustrated Keys: Part 1 - Foliose and Squamulose Species [English]
Xanthoria (Fr.) Th. Fr. in the Pacific Northwest [English]
Lichens of British Columbia, Illustrated Keys: Part 2 - Fruticose Species [English]

Greenland

Key to the Lepraria and Leprocaulon Species in Greenland [Estonia, English]

Mexico

Draft Keys to Species of Amanita Occurring in California, Idaho, Oregon & Washington USA, and in Neighbouring Regions of Canada and Mexico [English]

USA

Draft Keys to Species of Amanita Occurring in California, Idaho, Oregon & Washington USA, and in Neighbouring Regions of Canada and Mexico [English]
Draft Keys to Species of Amanita Occurring in Northeastern USA and Eastern Canada [English]
Fungi of California: a Simplified Key [English]
Simplified Field Key To Maine Macrolichens [USA, English]
Lichen Flora of Eastern North America [English]
Key to the Genera of the Operculate Cup Fungi of the Pacific Northwest & Rocky Mountain Region [English]
Key to Collybia Sensu Stricto of the Northeast United States & Canada [English]
Key to the Genus Ophioparma in Eastern North America [English]
Key to the Genus Parmelia Sensu Stricto in Eastern North America [English]
Key to Gomphillus of Eastern North America [English]
Key to Gymnopus of the Northeast United States & Canada [English]
Key to Lime-loving Lichens of Eastern North America [English]
Key to Rhodocollybia of the Northeast United States & Canada [English]
Key to Morchellaceae [English]
Lichens of the Ozarks: Key to Bacidia, Bacidina, Fellhanera and Some Other Species with a Similar Type of Spores [English]
Lichens of the Ozarks: Key to Protoblastenia [English]
Illustration of Key Morphological Characteristics of Phytophthora Species Identified in Virginia Nursery Irrigation Water [English]
Genus Amanita – World keys by taxonomic group [English]
Trial Key to Helvellaceae of the Pacific Northwest [English]
Synoptic Key to Common Lichens of the Northwest USA [English]
Xanthoria (Fr.) Th. Fr. in the Pacific Northwest [English]

SOUTH AMERICA

General

Key and Literature Guide to the Genera of Lichenized Fungi (Lichens) in the Neotropics [English]
Lichen Determination Keys: Neotropical Genera [English]
Lichen Determination Keys: Neotropical Hypotrachyna [English]
Lichen Determination Keys: Neotropical Parmotrema [English]
Lichen Determination Keys: Neotropical Stereocaulon [English]

Chile

Key to the lichen genus Cladonia (incl. Carassea) in SE Brazil [English]

Chile

Cladoniaceae of Chile [English]

Ecuador

Podetiate Lichens of Highland Ecuador [English]

French Guiana

Identification key and literature guide to the genera of Lichenized Fungi (Lichens) in the Neotropics [English]

Guyana

Key to the Lichen Genera of the Guianas [English]

Surinam

Key to the Lichen Genera of the Guianas [English]

ASCOMYCOTA (including lichens)

General, Arthoniales, Caliciales, Helotiales, Hypocreales, Lecanorales, Microthyriales, Pertusariales, Pezizales, Pleosporales, Rhytismatales, Sordariales, Teloschistales, Trichotheliales, Xylariales, Incertae Sedis

General

Lichen Key Archive [English]
Simplified Field Key To Maine Macrolichens [USA, English]
Illustrated Guide to Lichens on Twigs [UK, English]
Key and Literature Guide to the Genera of Lichenized Fungi (Lichens) in the Neotropics [Germany, English]
Key to Foliicolous Lichens and their Lichenicolous Fungi [Germany, English]
Lichens Interactive Keys [Estonia, English]
Key to the Lichen Genera of the Guianas [Germany, English]
Key to Lime-loving Lichens of Eastern North America [USA, English]
Lichen Determination Keys Available on the Internet [Germany, English]
Lichen Determination Keys: Common Malesian Lichen Genera [Germany, English]
Lichen Determination Keys: Lichens of Iran [Germany, English]
Lichen Determination Keys: Neotropical Genera [Germany, English]
Lichens of British Columbia, Illustrated Keys: Part 1, Foliose and Squamulose Species [Canada, English]
Podetiate Lichens of Highland Ecuador [Germany, English]
Synoptic Key to Common Lichens of the Northwest USA [USA, English]

Arthoniales

Key to Foliicolous Species of the Genus Arthonia [Germany, English]

Caliciales

Keys to Genera & Species of Caliciales in Norway [USA, English]
A Preliminary Key to Calicioid Lichens and Fungi in the Pacific Northwest [English]

Erysiphales

Key to the Genera of Powdery Mildew Fungi [USA, English]

Helotiales

Key to Geoglossum [UK, English]
Synoptic Keys to the Sclerotiniaceae & Rutstroemiaceae in Nordic Countries [Norway, English]

Hypocreales

Genera of Bionectriaceae, Hypocreaceae & Nectriaceae (Hypocreales, Ascomycetes) [USA, English] There is a 2013 update

Lecanorales

Bestimmungsschlüssel für die Parmeliaceae (Blattflechten) von Laurimacaronesien [Key to the Parmeliaceae (Foliose Lichens) of Macaronesia, Germany, German]
Key to Allocetraria Species [Estonia, English]
Key to Nephromopsis Species [Estonia, English]
Cladoniaceae of Chile [Germany, English]
Key to the Usnea Species in Europe [Estonia, English] (also translated to Italian
Key to the Usnea Species in the Baltic Countries [Estonia, English]
Key to the Genus Ophioparma in Eastern North America [USA, English]
Key to the Genus Parmelia Sensu Stricto in Eastern North America [USA, English]
Key to the Lepraria and Leprocaulon Species in Greenland [Estonia, English]
Key to the lichen genus Cladonia (incl. Carassea) in SE Brazil [Estonia, English]
ID Keys, The British Lichen Society [UK, English]
Lichen Determination Keys: Hyperphyscia [Germany, English]
Lichen Determination Keys: Neotropical Hypotrachyna [Germany, English]
Lichen Determination Keys: Neotropical Parmotrema [Germany, English]
Lichen Determination Keys: Neotropical Stereocaulon [Germany, English]
Lichen Determination Keys: Relicina [Germany, English]
Lichen Determination Keys: Tropical Corticolous Buellia [Germany, English]
Lichens of the Ozarks: Key to Bacidia, Bacidina, Fellhanera and Some Other Species with a Similar Type of Spores [USA, English]
Lichens of the Ozarks: Key to Protoblastenia [USA, English]

Pertusariales

Lichen Determination Keys: Megalosporaceae [Germany, English]
Lichen Determination Keys: Pertusaria in Europe & the Mediterranean [Germany, English]

Pezizales
Key to the Genera of the Operculate Cup Fungi of the Pacific Northwest & Rocky Mountain Region [USA, English]
Key to Morchellaceae [USA, English]
Systematic Studies in Discomycetes: Pezizales [USA, English]
Trial Key to Helvellaceae of the Pacific Northwest [USA, English]
TuberKey, an Interactive Key for Identification of Truffles [Italy, English, Italian]

Rhytismatales

Fungi of Ukraine: Rhytismatales [UK, English]
Key to Lophodermium [New Zealand, English]
Key to Rhytismataceae Genera [New Zealand, English]
Rhytismataceae by Host [New Zealand, English]

Sordariales

Lasiosphaeriaceae: Keys to Genera [USA, English]

Teloschistales

Xanthoria (Fr.) Th. Fr. in the Pacific Northwest [English]

Trichotheliales

Foliicolous Species of the Genus Porina [Germany, English]

Xylariales

Home of the Xylariaceae [USA, English]
Synoptic Key to Hypoxylon Taxa [France, English]

Incertae Sedis

Key to Gomphillus of Eastern North America [USA, English]

BASIDIOMYCOTA

Agaricales, Boletales, Botryobasidiales, Cantharellales, Cortinariales, General, Hymenochaetales, Russulales, Thelephorales, Tilletiales, Tremellales, Uredinales

General

Norske Poresopper [Nordic Polypores, Norway, Norwegian]

Agaricales

Amanitaceae Keys, Checklists, & some Illustrations in Institutional Collections [English]
Amanita Species of Section Phalloideae from North America Having Membranous, Limbate to Saccate Volvas [USA, English]
Provisional World Key to Species Close to Amanita hemibapha with Notes on the Slender Caesar's Mushrooms of Eastern North America [English]
Key to North American Armillaria species [English]
Coprinus: Studies in Coprinus - Keys to Subsections & Species in Coprinus [note: not updated Netherlands/Poland, English]
Draft Keys to Amanitaceae of Costa Rica & Neighbouring Regions [USA, English]
Draft Keys to Species of Amanita Occurring in California, Idaho, Oregon & Washington USA, and in Neighbouring Regions of Canada and Mexico [USA, English]
Draft Keys to Species of Amanita Occurring in Northeastern USA and Eastern Canada [USA, English]
Ed's E-Key, a User-friendly Point & Click Key to the Mushrooms of North America [USA, English]
Key to Collybia Sensu Stricto of the Northeast United States & Canada [USA, English]
Key to Gymnopus of the Northeast United States & Canada [USA, English]
Key to Inocybe [Germany, German]
A Key to the Mycenas of Norway and keys by Section [Norway, English]
Key to North American Armillaria Species [USA, English]
Key to Paxillus [Germany, German]
Key to Pholiota [Germany, German]
Key to Rhodocollybia of the Northeast United States & Canada [USA, English]
Key to the Taxa of Flammulina in Europe [English]
Clé des Tricholomes du Québec [Key to Tricholoma of Québec Canada, French]
Keys to Amanita [USA, English]
Keys to Coprinus [note: archived copy, not updated; Netherlands/Poland, English]
The Mushroom Place, Experimental Mushroom Numerical Key: Agarics [USA, English]
Provisional Key to Amanita Stirps Crocea, Amanita Stirps Fulva, and Amanita Stirps Romagnesiana [USA, English]
Provisional World Key to Species Close to Amanita hemibapha with Notes on the Slender Caesar's Mushrooms of Eastern North America [USA, English]
Tabular & Non-tabular Keys to Rubescent Species of Amanita Section Validae [USA, English]
A Visual Key to the Sections of Amanita [USA, English]

Boletales

Leccinum Revisited [UK, English]

Botryobasidiales

Keys for the Teleomorphs and Anamorphs of Botryobasidium [Germany, English]

Cantharellales

Cortinariales

Keys to Cortinarius Subgenus Dermocybe in Nordic Countries [Norway, English]

Hymenochaetales

Key to Species of Hyphodontia, Hyphodontiella, Schizopora, Echinoporia [Germany, English]

Russulales

Key to Lactarius in North America [USA, English]

Thelephorales

Tomentella und Verwandte Gattungen [Tomentella and Related Genera, Germany, German/English]

CHROMISTA

Identification of Common Phytophthora Species Using a Lucid Key [English]
Illustration of Key Morphological Characteristics of Phytophthora Species Identified in Virginia Nursery Irrigation Water [English]

CONIDIAL FUNGI

Key to the Fungi of the Genus Ascochyta [Germany, English]
Simplified Fungi Identification Key

MYXOMYCOTA

Echinosteliales (Myxomycetes): an INTKEY Package for Interactive, Illustrated Identification & Information Retrieval [Spain, English]
Mycetozoa GSMNP identification guide [USA, English]

ZYGOMYCOTA

Arbuscular Mycorrhizal Fungi: Species Descriptions from Reference Cultures by INVAM [USA, English]
AMF Phylogeny
Janusz Blaszkowski's website on Glomeromycota, Endogone and Complexipes

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