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PSILOCYBIAA monograph for the digital age.
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Psilocybia / The Index / Species record

The Psilocybe Index / Species account

Psilocybe mescaleroensis

Guzmán, Walstad, E. Gándara & Ram.-Guill.

Taxonomy: acceptedChemistry: Not yet researchedMolecular data: Not yet researched

Scoped agent source check; no human scientific review. Comprehensive morphology and synonymy remain incomplete. Chemistry, molecular literature, conservation and occurrence datasets remain unresearched. Locality passages document source collections rather than complete range. One licensed photograph added after image-source review on 14 September 2026; identification follows the credited source and is not an independent specimen determination.

01Overview

Agent source-checked

This scoped account documents selected morphology and collection context from checked sources. It is not a comprehensive species monograph. [ramirez-cruz-2013-types]

This is a scientific reference record, not field-identification guidance.

Figure 01Field photograph
Pale-capped fruit bodies arranged in grass, showing cap surfaces, gills and stems.

Psilocybe mescaleroensis

New Mexico, USA · 2016-08-31

Source identification: Psilocybe mescaleroensis. Mushroom Observer observation 260056; not the type collection.

Photograph: Alan Rockefeller · Source · CC BY-SA 4.0

Resized and re-encoded; full composition retained.

02Nomenclature

Accepted name
Psilocybe mescaleroensis
Authority
Guzmán, Walstad, E. Gándara & Ram.-Guill.
Family
Agrocybaceae
Publication year
2007
Basionym
Not yet researched — verification required
Taxonomic status
accepted
MycoBank identifier
Not yet researched — verification required
Index Fungorum identifier
Not yet researched — verification required
Synonyms (0 recorded names)

No verified synonyms entered. This does not indicate that synonyms do not exist.

Nomenclatural sources: [gbif-5459263-2026] [ramirez-cruz-2013-types] [niskanen-2026]

Research completeness

taxonomy
Agent source-checked — Codex (agent), 2026-09-13

Name and type treatment checked; exhaustive synonymy remains pending. Family classification explicitly reconciled.

overview
preliminary

Selected passages checked; coverage is incomplete.

description
disputed

Selected measurements and µm units checked against PDF page images; broader description coverage remains incomplete. Conflicting pleurocystidial observations retained without a synthetic diagnosis.

ecology
preliminary

Selected passages checked; coverage is incomplete.

distribution
disputed

Both type-provenance assertions checked and retained; discrepancy remains open.

chemistry
not researched

Not researched for this account; no absence claim.

molecular
not researched

Not researched for this account; no absence claim.

history
preliminary

Selected passages checked; coverage is incomplete.

conservation
not researched

Not researched for this account; no absence claim.

03Taxonomic description

Taxonomic description. These characters are presented for scientific reference and are not intended as field-identification guidance.

Macroscopic characters

Agent source-checked

The original description gives a cap diameter of (20–)30–45(–60) mm and describes a convex to slightly umbonate cap with a frequently wavy margin and a short-lived, slightly membranous ring. These are selected observations from the protologue. [guzman-2007-mescaleroensis]

Microscopic characters

Agent source-checked

The 2013 revision reports spores 9.6–11.2(12.0) × (5.6)6.4–7.2 µm and sparse pleurocystidia. The original description explicitly reports pleurocystidia absent and describes subrhomboid or subovoid spores, whereas the revision describes ellipsoid, elongate and fusiform spores. The accounts are retained as differing observations rather than combined into a single diagnosis. [ramirez-cruz-2013-types] [guzman-2007-mescaleroensis]

04Distribution and ecology

Agent source-checked

The original paper lists Walstad s.n., July 2004, near Mescalero in Sierra Blanca, Mescalero Range, Lincoln County, New Mexico (XAL holotype; NY isotype). The 2013 revision instead lists Sacramento, New Mexico, August 2007, L. F. Walstad s.n. (XAL holotype). The locality and date discrepancy remains unresolved; neither account establishes a complete range. [guzman-2007-mescaleroensis] [ramirez-cruz-2013-types]

Known range
Not yet researched
Habitats
Not yet researched
Substrates
Not yet researched
Ecological associations
Not yet researched
Seasonality
Not yet researched

Ecological context

Agent source-checked

The original paper reports fruiting on rich soil or decaying grasses in grassland near Pinus ponderosa forest, with observations in summer and autumn. These statements describe the material covered by that paper. [guzman-2007-mescaleroensis]

Occurrence records

Occurrence map — awaiting verified records

No occurrence points loaded.

Recorded observations are not equivalent to true biological range. Absence of records does not demonstrate absence of a species.

Occurrence provenance & future map methods
Source
Not yet supplied
Licence / retrieval date
Awaiting licence / Not retrieved
Coordinate uncertainty
Not reviewed
Sensitive records
unreviewed

Future ingestion will review licensing, coordinate uncertainty and sensitive locations. Sampling, clustering and date filters will operate on separately loaded datasets; no coordinates are embedded in this page.

05Chemistry

Measurements belong to studies, specimens and methods. A single concentration cannot stand in for a species.

Published assays · Measurements retain their original methodological context.
Study / yearMaterialMethodRecord
No verified assay records entered. This does not establish that no published assays exist.
Fields retained in each future assay record

Study, publication year, specimen, material, sample size, provenance, analytical method, preparation, storage, psilocybin, psilocin, baeocystin, norbaeocystin, aeruginascin, units, qualifiers and methodological notes. No concentrations have been invented for this prototype.

Modern quantitative assays

Not yet researched

Modern analytical studies have not yet been systematically searched and checked for this account.

Evidence assessment

Not yet researched

Chemical literature has not yet been reviewed for this account. No assay values are extracted; this does not establish compound presence or absence.

Assessments depend on material, preparation, storage, sampling and analytical methods. Measurements are literature records, not predictions of effects.

How chemistry records are structured ↗

06Molecular evidence

Not yet researched

This section has not yet been researched for this account.

07History

Agent source-checked

Guzmán and colleagues described the species in Mycotaxon 99:223–226 (2007), with the name on p. 225. Their placement in section Stuntzii was questioned by the 2013 type revision, which compared it with Semilanceatae or Cyanescens. No sectional assignment is adopted here. [guzman-2007-mescaleroensis] [ramirez-cruz-2013-types]

A place for the historical record

This account records the nomenclatural history checked so far. Broader historical research remains pending; interpretations must stay connected to their documentary sources.

Reading the scientific record ↗

08Conservation

Not yet researched

This section has not yet been researched for this account.

Assessment status
Not yet researched
Assessment authority / year
Not verified / Not verified

Not researched by Psilocybia, not assessed by a conservation authority, and Least Concern are different states. None should be inferred from another.

09Images & specimens

The opening photograph is Figure 01. Its caption records the source identification and attribution; it is not a type specimen unless explicitly stated.

Photographs are not presented as sufficient for mushroom identification.

10References

  1. T. Niskanen; B. Dentinger; A.M. Ainsworth; I. Kytövuori; J.T. Kim; G.W. Griffith; K. Liimatainen (2026). Re-shaping the family-level classification of Agaricineae (Agaricales, Basidiomycota) using a phylogenomic approach. Studies in Mycology 113(1), 115–134. DOI: 10.3114/sim.2026.113.03 Source record ↗

    Source class: primary.

    Source verification history
    • metadata: verified · 2026-09-10 · Codex (agent) (agent). Verification source

      Bibliographic identity inspected; publication year is distinct from retrieval date.

    • content: verified · 2026-09-10 · Codex (agent) (agent). Verification source

      Family treatment Agrocybaceae, Table 1 and classification discussion inspected in the PDF. Effective online date in paper: 1 April 2026; Crossref issue date differs, so the record retains year only.

    • doi: verified · 2026-09-10 · Codex (agent) (agent). Verification source

      DOI and title matched against the cited bibliographic record; not just resolver availability.

  2. Virginia Ramírez-Cruz; Gaston Guzmán; Laura Guzmán-Dávalos (2013). Type studies of Psilocybe sensu lato (Strophariaceae, Agaricales). Sydowia 65(2), 277–319. Source record ↗

    Source class: primary.

    Source verification history
    • metadata: verified · 2026-09-10 · Codex (agent) (agent). Verification source

      Bibliographic identity checked against the publication.

    • content: verified · 2026-09-10 · Codex (agent) (agent). Verification source

      Full PDF inspected, with goniospora pp. 291–292 and ovoideocystidiata pp. 302–303 read in detail. No numeric microdimensions transcribed because extracted unit glyphs are unreliable. Qualitative cystidial observations and the type voucher are used.

  3. Gastón Guzmán; Lee Walstad; Etelvina Gándara; Florencia Ramírez-Guillén (2007). A new bluing species of Psilocybe, section Stuntzii, from New Mexico, U.S.A.. Mycotaxon 99, 223–226. DOI: 10.5962/p.419180 Source record ↗

    Source class: primary.

    Source verification history
    • metadata: verified · 2026-09-13 · Codex (agent) (agent). Verification source

      Cached full paper inspected, including title page and pp. 225–226. Title, authors, year, volume and pages agree with the cached Crossref DOI record. Fresh DOI web opening failed; verification uses cached bibliographic response. No chemical assay is extracted.

    • content: verified · 2026-09-13 · Codex (agent) (agent). Verification source

      Cached full paper inspected, including title page and pp. 225–226. Title, authors, year, volume and pages agree with the cached Crossref DOI record. Fresh DOI web opening failed; verification uses cached bibliographic response. No chemical assay is extracted.

    • doi: verified · 2026-09-13 · Codex (agent) (agent). Verification source

      Cached full paper inspected, including title page and pp. 225–226. Title, authors, year, volume and pages agree with the cached Crossref DOI record. Fresh DOI web opening failed; verification uses cached bibliographic response. No chemical assay is extracted.

  4. GBIF Secretariat (2026). Psilocybe mescaleroensis — GBIF Backbone Taxonomy record 5459263; checked 13 September 2026. . Source record ↗

    Source class: taxonomic database.

    Source verification history
    • metadata: verified · 2026-09-13 · Codex (agent) (agent). Verification source

      Cached name-record response inspected: name, authorship, publication, rank, acceptance and family. Underlying interpretation is dated 2023. No fresh retrieval or occurrence-data check claimed.

    • content: verified · 2026-09-13 · Codex (agent) (agent). Verification source

      Cached name-record response inspected: name, authorship, publication, rank, acceptance and family. Underlying interpretation is dated 2023. No fresh retrieval or occurrence-data check claimed.

Claim provenance

Source checks record what was inspected. Publication approval and section review are separate editorial decisions.

Name and publication citation checked; authority spacing normalized.

Fields: taxonomy.canonical_name, taxonomy.accepted_name, taxonomy.genus, taxonomy.specific_epithet, taxonomy.authority, taxonomy.publication_year

Retain species within the primary type treatment, corroborated by GBIF. Comprehensive synonymy remains pending.

Fields: taxonomy.status

Follow the 2026 family treatment.

Fields: taxonomy.family

GBIF retains Hymenogastraceae.

Fields: taxonomy.family

This scoped account documents selected morphology and collection context from checked sources. It is not a comprehensive species monograph.

Fields: overview.text

The original description gives a cap diameter of (20–)30–45(–60) mm and describes a convex to slightly umbonate cap with a frequently wavy margin and a short-lived, slightly membranous ring. These are selected observations from the protologue.

Fields: description.macroscopic.text

The 2013 revision reports spores 9.6–11.2(12.0) × (5.6)6.4–7.2 µm and sparse pleurocystidia. The original description explicitly reports pleurocystidia absent and describes subrhomboid or subovoid spores, whereas the revision describes ellipsoid, elongate and fusiform spores. The accounts are retained as differing observations rather than combined into a single diagnosis.

Fields: description.microscopic.text

The original paper reports fruiting on rich soil or decaying grasses in grassland near Pinus ponderosa forest, with observations in summer and autumn. These statements describe the material covered by that paper.

Fields: ecology.narrative.text

The original paper lists Walstad s.n., July 2004, near Mescalero in Sierra Blanca, Mescalero Range, Lincoln County, New Mexico (XAL holotype; NY isotype). The 2013 revision instead lists Sacramento, New Mexico, August 2007, L. F. Walstad s.n. (XAL holotype). The locality and date discrepancy remains unresolved; neither account establishes a complete range.

Fields: distribution.narrative.text

Guzmán and colleagues described the species in Mycotaxon 99:223–226 (2007), with the name on p. 225. Their placement in section Stuntzii was questioned by the 2013 type revision, which compared it with Semilanceatae or Cyanescens. No sectional assignment is adopted here.

Fields: history.text

Original type collection: July 2004, near Mescalero, Sierra Blanca, Lincoln County; XAL holotype and NY isotype.

Fields: distribution.narrative.text

Revision type collection: August 2007, Sacramento, New Mexico; XAL holotype.

Fields: distribution.narrative.text

  • ramirez-cruz-2013-types — p. 297

    Source checked · Accessed 2026-09-13 · Codex (agent). Scoped source passage checked; no human scientific review.

The original explicitly reports pleurocystidia absent.

Fields: description.microscopic.text

The revision observes sparse pleurocystidia and says the original did not mention them.

Fields: description.microscopic.text

  • ramirez-cruz-2013-types — p. 297

    Source checked · Accessed 2026-09-13 · Codex (agent). Scoped source passage checked; no human scientific review.

Conflicting evidence

Resolved: taxonomy.family

GBIF retains an older family classification.

Adopt Niskanen et al. (2026), which includes Psilocybe in Agrocybaceae; use GBIF only to corroborate nomenclature and species acceptance. — Codex (agent), 2026-09-13

Unresolved: distribution.narrative.text

The two papers disagree on date and locality wording for the holotype; label inspection or an author correction is needed.

Unresolved: description.microscopic.text

Presence versus absence differs, and the revision inaccurately characterizes the original wording. Both observations remain attributed; no cause is established.