Entoloma

Entoloma
Entoloma sinuatum
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Entolomataceae
Genus: Entoloma
(Fr.) P.Kumm. (1871)
Type species
Entoloma sinuatum
(Bull.) P.Kumm. (1871)
Species

1948 species[1]

Synonyms
List
  • Agaricus trib. Entoloma Fr. (1838)
  • Alboleptonia Largent & R.G.Benedict (1970)
  • Arenicola Velen. (1947)
  • Calliderma (Romagn.) Largent (1994)
  • Claudopus Gillet (1876)
  • Clitopiloides (Romagn.) Largent (1994)
  • Eccilia (Fr.) P.Kumm. (1871)
  • Fibropilus (Noordel.) Largent (1994)
  • Inocephalus (Noordel.) P.D.Orton (1991)
  • Leptonia (Fr.) P.Kumm. (1871)
  • Leptoniella Earle (1909)
  • Nigropogon Coker & Couch (1928)
  • Nolanea (Fr.) P.Kumm. (1871)
  • Omphaliopsis (Noordel.) P.D.Orton (1991)
  • Paraeccilia Largent (1994)
  • Paraleptonia (Romagn. ex Noordel.) P.D.Orton (1991)
  • Pouzarella Mazzer (1976)
  • Richoniella Costantin & L.M.Dufour (1900)
  • Rhodocybella T.J.Baroni & R.H.Petersen (1987)
  • Rhodogaster E.Horak (1964)
  • Rhodophyllus Quél. (1886) (nom. illegit.)
  • Trichopilus (Romagn.) P.D.Orton (1991)

Entoloma is a genus of fungi in the order Agaricales. Called pinkgills in English, basidiocarps (fruit bodies) are typically agaricoid (gilled mushrooms), though a minority are gasteroid. All have salmon-pink basidiospores which colour the gills at maturity and are angular (polyhedral) under a microscope. The genus is large, with almost 2000 species worldwide. Most species are saprotrophic, but some are ectomycorrhizal, and a few are parasitic on other fungi. The type, Entoloma sinuatum, is one of several Entoloma species that are poisonous, typically causing mild to severe gastrointestinal illness.

Taxonomy

History

In 1838 the Swedish mycologist Elias Magnus Fries classified all pink-spored, gilled fungi into "tribes" or "subtribes", placing those with a Tricholoma-like shape and gills attached to the stem into tribe Entoloma. The small subtribe Leptonia had convex fleshy membranaceous caps, the subtribe Nolanea were slender fungi with bell-shaped caps and hollow stems, and the subtribe Eccilia had umbilicate caps and adnate gills.[2] In 1871 German mycologist Paul Kummer raised these tribes and subtribes to genera.[3] Additional genera were added by subsequent authors.[4][5][6] Following this classification system, Entoloma has a restricted meaning and has sometimes been referred to as Entoloma sensu stricto.[6]

In 1886 French mycologist Lucien Quélet united all the fungi with pinkish-red adnate or sinuate gills and angular spores into a new genus Rhodophyllus (meaning "pink gill").[7] Because his new genus included the earlier name Entoloma, Rhodophyllus is illegitimate, as noted by Donk,[8] and Entoloma was subsequently adopted to cover all the pink-spored agarics with angular spores.[9] Following this classification system, Entoloma has a broad meaning and has sometimes been referred to as Entoloma sensu lato.[4][9] The synonyms listed here are applicable to Entoloma sensu lato.

These two classification systems continue to co-exist, with those taxonomists favouring a broad generic concept following Quélet, and the others a narrow generic concept following Kummer.

Current status

Recent molecular research, based on cladistic analysis of DNA sequences, has shown that Entoloma sensu lato is monophyletic (a natural grouping), whereas Entoloma sensu stricto, as previously defined, is paraphyletic (an artificial grouping). The other genera (Leptonia, Nolanea, etc., as previously defined) are equally artificial.[10]

Accordingly, Entoloma is now broadly applied by most mycologists, pending further research. Some of the component genera are, however, currently being redefined by DNA sequencing. Thus Nolanea, for example, has been redefined (by excluding some species and adding others) as a monophyletic grouping within Entoloma sensu lato and treated either as a subgenus[11] or as a separate genus.[12] A basal group of species has also been moved to the genus Entocybe based on DNA research.[13]

Etymology

The name Entoloma is derived from the Greek entos (ἐντός) meaning inner and lóma (λῶμα) meaning fringe from the in-rolled margin.[14]

Description

Angular (polyhedral) basidiospores of Entoloma chloropolium

Basidiocarps (fruit bodies) are typically agaricoid (mushroom-shaped with gills), occasionally secotioid or gasteroid (truffle-like). Agaricoid species are variously large and thick-set to small and delicate, but all have lamellae (gills) that are attached to the stem (not free) and become pinkish with age from the pink basidiospores. The stipe (stem) lacks an annulus (ring). A few species are pleurotoid with a small lateral stem. Secotioid and gasteroid species (previously referred to the genera Richoniella and Rhodogaster) have irregularly globose fruit bodies, brownish with a distinct stipe in secotioid species (such as the European Entoloma calongei) or whitish without a stipe in truffle-like species (such as Entoloma gasteromycetoides described from New Zealand). All are internally pinkish (from the spores) when mature. Microscopically, all Entoloma species have basidiospores that are angular in all views.

Ecology

Most species are saprotrophic, growing on decaying plant material or (less commonly) on dead wood. A few species are ectomycorrhizal. Entoloma sinuatum, for example, has been shown to form an association with willows (Salix species)[15] and Entoloma nitidum with hornbeams (Carpinus species).[16] A similar association of Entoloma sepium with fruit trees (Rosaceae) has, however, been shown to be root parasitism,[17] though other studies have suggested some kind of mycorrhizal partnership may exist.[18] A very few species are parasitic on other fungi, notably Entoloma abortivum a parasite of Armillaria species,[19] and Entoloma parasiticum which frequently grows on fruit bodies of Cantharellus species.[9]

Entoloma species are found in a wide variety of habitats, including grasslands and dunes, temperate and tropical forests and woodlands, peat-bogs and moors.[9]

Conservation

Some European Entoloma species are restricted to waxcap grassland (nutrient-poor grassland), a declining habitat as a result of changes in agricultural practice. This decline has led to four European Entoloma species, Entoloma bloxamii, E. griseocyaneum, E. porphyrophaeum, and E. prunuloides, being assessed as globally "vulnerable" on the IUCN Red List of Threatened Species.[20]

Elsewhere, several rare and localized endemic species are assessed as globally "endangered" on the IUCN Red List of Threatened Species.[20] They include Entoloma chilense in Chile, E. eugenei in Japan, Korea, and the Russian Far East, and E. ravinense in Australia. Entoloma alissae in California and E. necopinatum in Chile are assessed as globally "vulnerable".[20]

Toxic and edible species

Several Entoloma species are known to be poisonous, causing gastroenteric symptoms (vomiting, diarrhea, nausea, and abdominal pain).[21] At least one poisonous species, E. rhodopolium, has been found to contain significant quantities of the mycotoxin muscarine.[21] The English naturalist Charles David Badham mistakenly ate Entoloma sinuatum and was "so continually and fearfully purged, and suffered so much from headache and swimming of the brain, that I really thought that every moment would be my last."[22] Other species known to be poisonous include Entoloma mammosum, E. pascuum, E. strictius, and E. vernum.[21] Additional species reported as poisonous include Entoloma abortivum[23] (reported as edible, below), E. aprile,[23] E. bahusiense,[23] E. grande,[23] E. luridum,[23] E. omiense,[24] and E. quadratum.[24]

Fruit bodies of a number of Entoloma species are reported as being locally consumed, including Entoloma abortivum (reported as toxic, above) and E. clypeatum in Mexico, E. rhodopolium (reported as toxic, above) and E. clypeatum in Ukraine, and E. argyropus in Tanzania.[25] It seems probable that some of these Entoloma species were misidentified and "all should be regarded as potentially dangerous".[26]

References

  1. ^ "Catalogue of Life". Retrieved 2023-05-15.
  2. ^ Fries, EM (1838). Epicrisis Systematis Mycologici: Seu Synopsis Hymenomycetum. Vol. 1–2. Uppsala, Sweden: Regiae Academiae Typographia.
  3. ^ Kummer, Paul (1871). Der Führer in die Pilzkunde : Anleitung zum methodischen, leichten und sichern Bestimmen der in Deutschland vorkommenden Pilze : mit Ausnahme der Schimmel- und allzu winzigen Schleim- und Kern-Pilzchen. Zerbst: Verlag von E. Luppe's Buchhandlung. pp. 94–97.
  4. ^ a b Orton PD (1991). "A revised list of British species of Entoloma sensu lato". The Mycologist. 5 (3): 123–138. doi:10.1016/S0269-915X(09)80307-8.
  5. ^ Orton PD (1991). "A revised list of British species of Entoloma sensu lato (part 2)". The Mycologist. 5 (4): 172–176. doi:10.1016/S0269-915X(09)80478-3.
  6. ^ a b Largent DL (1994). Entolomatoid fungi of the western United States and Alaska. USA: Mad River Press.
  7. ^ Quélet L. (1886). Enchiridion fungorum in Europa media et praesertim in Gallia vigentium. Switzerland: O. Doin. p. 155.
  8. ^ Donk, M.A. (1962). "The generic names proposed for Agaricaceae". Beihefte zur Nova Hedwigia. 5: 1–320. ISSN 0078-2238.
  9. ^ a b c d Noordeloos ME (1992). Fungi Europaei:Entoloma sensu lato. Saronno, Italy: Giovanna Biella. p. 760.
  10. ^ Co-David D, Langeveld D, Noordeloos ME (2009). "Molecular phylogeny and spore evolution of Entolomataceae" (PDF). Persoonia. 23: 147–76. doi:10.3767/003158509X480944. PMC 2802732. PMID 20198166.
  11. ^ Reschke K, Morozova OV, Dima B, Cooper JA, Corriol G, Biketova AY, Piepenbring M, Noordeloos ME (2022). "Phylogeny, taxonomy, and character evolution in Entoloma subgenus Nolanea" (PDF). Persoonia. 49: 136–170. doi:10.3767/persoonia.2022.49.04. PMC 10792224. PMID 38234382.
  12. ^ Karstedt F, Bergemann SE, Capelari M (2020). "Five Nolanea spp. nov. from Brazil" (PDF). Mycotaxon. 135 (3): 589–612. doi:10.5248/135.589. S2CID 226328843.
  13. ^ Baroni TJ, Hofstetter V, Largent DL, Vilgalys R (2011). "Entocybe is proposed as a new genus in the Entolomataceae (Agaricomycetes, Basidiomycota) based on morphological and molecular evidence" (PDF). North American Fungi. 6 (12): 1–19. doi:10.2509/naf2011.006.012 (inactive 2024-11-02).{{cite journal}}: CS1 maint: DOI inactive as of November 2024 (link)
  14. ^ Nilson S, Persson O (1977). Fungi of Northern Europe 2: Gill-Fungi. Penguin. p. 98. ISBN 0-14-063006-6.
  15. ^ Agerer R (1997). "Entoloma sinuatum (Bull.: Fr.) Kummer + Salix spec". Descriptions of Ectomycorrhizae. 2: 13–18.
  16. ^ Montecchio L, Rossi S, Courty P, Garbaye J (2006). "Descriptions of Ectomycorrhizae. Entoloma nitidum Quel. plus Carpinus betulus L." Descriptions of Ectomycorrhizae. 9/10: 31–36.
  17. ^ Agerer R, Waller K (1993). "Mycorrhizae of Entoloma saepium: parasitism or symbiosis?". Mycorrhiza. 3 (4): 145–154. Bibcode:1993Mycor...3..145A. doi:10.1007/BF00203608. S2CID 38744989.
  18. ^ Shishikura M, Takemura Y, Sotome K, Maekawa N, Nakagiri A, Endo N (2021). "Four mycelial strains of Entoloma clypeatum species complex form ectomycorrhiza-like roots with Pyrus betulifolia seedlings in vitro, and one develops fruiting bodies 2 months after inoculation". Mycorrhiza. 31 (1): 31–42. Bibcode:2021Mycor..31...31S. doi:10.1007/s00572-020-00994-4. PMID 33105488. S2CID 254047880.
  19. ^ Koch RA, Herr JR (2021). "Transcriptomics Reveals the Putative Mycoparasitic Strategy of the Mushroom Entoloma abortivum on Species of the Mushroom Genus Armillaria". mSystems. 6 (5): e0054421. doi:10.1128/mSystems.00544-21. PMC 8510539. PMID 34636668.
  20. ^ a b c "Entoloma: The IUCN Red List of Threatened Species". Retrieved 2022-05-01.
  21. ^ a b c Benjamin, Denis R. (1995). Mushrooms: Poisons and Panaceas—A Handbook for Naturalists, Mycologists and Physicians. New York: WH Freeman and Company. ISBN 0-7167-2600-9.
  22. ^ Badham CD (1847). A treatise on the esculent funguses of England. London: Reeve Bros. p. 138.
  23. ^ a b c d e Beug MW, Shaw M, Cochran KW (2006). "Thirty-Plus Years of Mushroom Poisoning: Summary of the Approximately 2,000 Reports in the NAMA Case Registry" (PDF). McIlvainea. 16 (2): 47–68. Archived from the original (PDF) on 2023-05-30. Retrieved 2023-04-25.
  24. ^ a b Li H, Zhang H, Zhang Y, Zhang K, Zhou J, Yin Y, Jiang S, Ma P, He Q, Zhang Y, Wen K, Yuan Y, Lang N, Lu J, Sun C (2020). "Mushroom Poisoning Outbreaks — China, 2019[J]" (PDF). China CDC Weekly. 2 (2)): 19–24. doi:10.46234/ccdcw2020.005. PMC 8392910. PMID 34594654.
  25. ^ Boa ER. (2004). Wild Edible Fungi: A Global Overview of Their Use and Importance to People. Food & Agriculture Organization. p. 138. ISBN 978-92-5-105157-3.
  26. ^ Spoerke DG, Rumack BH (1994). Handbook of mushroom poisoning: diagnosis and treatment. Boca Raton: CRC Press.

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