The references consulted for identifications and DNA reviews, in the order they are used.

Tier 1 — Names and nomenclature (check first, every ID)

SourceSiteUsed for
Species Fungorum (Kew)speciesfungorum.orgCurrent name + synonymy
Index Fungorum (Kew)indexfungorum.orgSpelling, author, where published
GBIF species APIapi.gbif.orgDetect synonymy (`status`, `acceptedUsageKey`)
iNaturalist taxa APIapi.inaturalist.orgThe name Will uploads under (`is_active`, synonyms); taxon change history at inaturalist.org/taxon_changes/<id>
MycoBankwww.mycobank.orgRegistration of new names; MB number, authority, classification, synonyms
Madrid Code (ICN 2025, incl. Chapter F)iaptglobal.orgNaming rules
Fungal Names (Institute of Microbiology, Chinese Academy of Sciences, Beijing)nmdc.cnThe third official registration repository under ICN Art. F.5 (with S2 and S5); FN numbers appear in protologues of many Asian-described species

Tier 2 — Species concepts: revisions, monographs, specialist sites

SourceSiteUsed for
Open-access journals: MycoKeys (mycokeys.pensoft.net), Fungal Systematics and Evolution (fuse-journal.org), Studies in Mycology, IMA Fungus, Persoonia, PeerJ (peerj.com/articles/N — WF works; doi.org redirect needed a permission click, 2026-09-22); PubMed CentralNewest revisions — outrank everything below
Tulloss et al., Amanitaceae.org (Amanita, Limacella, Catatrama; provisional sp-XX) — now hosted by Mushroom Observeramanitaceae.mushroomobserver.orgTHE Amanita reference for eastern North America: classification to stirps, measurements, look-alikes, range
Univ. Michigan Herbarium online monographs (Smith, Hesler; Smith & Thiers 1971 Boletes of Michigan)quod.lib.umich.eduClassic descriptions, microscopy
Smith, North American Species of Mycena (1947) PDFalpental.comMycena
Smith, Pholiota (USDA PDF)fs.usda.govPholiota
Internet Archive full text (public domain): Coker, Clavarias of the US and Canada (1923) · Coker & Couch, Gasteromycetes of the Eastern US and Canada (1928) · Kauffman, Agaricaceae of Michigan (1918)archive.orgCoral fungi; puffballs/earthstars/stinkhorns; general agarics
Coker, Amanitas of the Eastern US (1917)babel.hathitrust.orgAmanita history
North American Flora vol. 9–10 (Murrill et al.)Murrill agaric descriptions
MykoWeb (Wood & Stevens)mykoweb.comOnline reprints: Smith & Hesler, North American Species of Pholiota; Hesler & Smith, North American Species of Crepidotus; Thiers, Boletes of California
MushroomExpert.com (Kuo)mushroomexpert.comEastern NA species concepts, keys, citations to literature
hebeloma.org (The Hebeloma team) — "Hebeloma morphology and characters"hebeloma.orgHebeloma: collecting tips, the macroscopic characters to record, and the microscopic characters (spore size, ornamentation and dextrinoid reaction; basidia; cheilo-, pleuro- and caulocystidia; pellis; clamps) with the site's measurement protocol

Tier 3 — Regional and general identification aids

SourceSiteUsed for
texasmushrooms.org (Sergeev)texasmushrooms.orgGulf-region photos, ~1,200 species
Bessette, Bessette & Lewis, Mushrooms of the Gulf Coast States (2019) — intro pp. 1–7 and color keydegruyterbrill.comKeys to groups only
Watling, Identification of the Larger Fungi (1973)gutenberg.orgGroup keys, collecting method
Kendrick, The Fifth Kingdom (website edition)mycolog.comFungal biology, terminology
Character checklist "Simple & Advanced Characters With Taxonomic Value For Stipitate-Lamellate Mushrooms" (= Will's "Observation List", EXD) and "Intro To Identifying Fungi" (nolo_mode)inaturalist.orgWhat characters to record
Host trees: ACES Key to Common Native Trees of Alabama (ANR-0509, rev. 2021) · Virginia Tech Dendrology factsheetsaces.eduConfirming the host/associated tree
Wang, Liu & Xu 2017, Drying methods for mushroom DNA, Sci. Rep. 7:3008doi.orgVoucher drying for sequencing
Bessette, Bessette & Fischer 1997, Mushrooms of Northeastern North America (the page names this book; CORRECTION: not "North American Boletes", which is Bessette, Roody & Bessette 2000) — species descriptions on B. Horn's bolete pagespeople.csail.mit.eduBolete descriptions, measurements
Alabama Mushroom Society charts: Latin colors; spore-print color indicationsalabamamushroomsociety.orgColor terms, spore color groups

Tier 4 — Evidence sources (observations and sequences, not authorities)

SourceSiteUsed for
iNaturalist observationsLabels are never corroboration
Mushroom Observer APImushroomobserver.orgName records list multiple senses (e.g. *Amanita farinosa* Schwein. vs sensu Thiers vs sensu Zhu L. Yang — seen 2026-09-19); web pages need login
MycoMap, GenBank/BLAST, UNITEA sequence anchors a name only from a vouchered/type specimen; UNITE WF blocked by robots.txt (2026-09-30); PlutoF public taxa API URL tried returned 404
MyCoPortal (NA herbarium records)Old names on specimens
FunDiSfundis.orgSequencing programs
Murrill et al., North American Flora vol. 9 (1907–1916), Polyporaceae, Boletaceae, Agaricaceaearchive.orgMurrill protologues (e.g. Gyroporus subalbellus p. 134)
MycoCosm — JGI (US DOE Joint Genome Institute) fungal genome portalmycocosm.jgi.doe.govWhole-genome reference for a taxon: all ITS copies in one genome (checks dikaryon / intragenomic-variation calls, S46), genome-scale placement of a genus

Tier 2b — DNA barcoding: methods, limits, species concepts (background literature)

SourceSiteUsed for
White, Bruns, Lee & Taylor 1990, Amplification and direct sequencing of fungal ribosomal RNA genes for phylogenetics. In PCR Protocols (Academic Press)Origin of the ITS1/ITS4 primers still used to amplify the barcode
Taylor et al. 2000, Phylogenetic species recognition and species concepts in fungi. Fungal Genet. Biol. 31:21–32. doi 10.1006/fgbi.2000.1228GCPSR: species recognised by concordance of several gene genealogies — why one locus can't settle a split
Lindner & Banik 2011, Intragenomic variation in the ITS rDNA region obscures phylogenetic relationships and inflates estimates of OTUs in genus Laetiporus. Mycologia 103:731–740. doi 10.3852/10-331research.fs.usda.govMultiple ITS copies in one genome can look like separate taxa
Schoch et al. 2012, Nuclear ribosomal ITS region as a universal DNA barcode marker for Fungi. PNAS 109:6241–6246. doi 10.1073/pnas.1117018109ITS adopted as THE fungal barcode: best overall success, clearest barcode gap; LSU better in some groups
Spatafora et al. 2017, The Fungal Tree of Life: from molecular systematics to genome-scale phylogenies. Microbiol. Spectrum 5(5). doi 10.1128/microbiolspec.FUNK-0053-2016Higher classification (8 phyla, 12 subphyla, 46 classes)
Lücking et al. 2020, Unambiguous identification of fungi: where do we stand and how accurate and precise is fungal DNA barcoding? IMA Fungus 11:14. doi 10.1186/s43008-020-00033-zCurrent framework: integrative (polyphasic) taxonomy; "no single tool"; ITS a first diagnosis; verification crucial; alignment-based phylogeny preferred over pairwise similarity
Bradshaw et al. 2023, Extensive intragenomic variation in the ITS region of fungi. iScience 26(8):107317. doi 10.1016/j.isci.2023.107317641 of 2414 genomes had multiple ITS copies; ~65% of those varied — dikaryon/multi-haplotype consensus issues are common, not rare
Shapkin et al. 2026, Limitations of common molecular markers in fungal biodiversity analysis and the benefits of their synergistic use. Mol. Ecol. Resour. 26(3):e70123. doi 10.1111/1755-0998.70123Mock community of 413 species: ITS2 alone detected 75.3%; ITS1+ITS2+EF1α 92.2%
Nilsson et al. 2006, Taxonomic reliability of DNA sequences in public sequence databases: a fungal perspective. PLoS ONE 1:e59. doi 10.1371/journal.pone.0000059"about 20% of the entries may be incorrectly identified to species level" — why a GenBank label is not corroboration
Farid, Franck & Garey 2017, Boletus rubricitrinus belongs in Pulchroboletus. Czech Mycology 69(2):143–162czechmycology.orgP. rubricitrinus emended description, epitype, macrochemistry, Baldwin Co. AL specimens
Frank, Bessette & Bessette 2017, Alessioporus rubriflavus, a new species from the eastern US. North American Fungi 12(2):1–8, doi 10.2509/naf2017.012.002academia.eduAlessioporus rubriflavus protologue
Crous et al. 2019, Fungal Planet description sheets 951–1041. Persoonia 43:223–425 (FP1029 Pulchroboletus sclerotiorum)www.ebi.ac.ukP. sclerotiorum protologue

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