Paralepista

Paralepista is a genus of mushrooms in family Tricholomataceae. Until 2012, its member species were generally assigned either to Lepista or to Clitocybe.

Paralepista
Paralepista flaccida
Scientific classification
Kingdom:
Fungi
Division:
Basidiomycota
Class:
Agaricomycetes
Order:
Agaricales
Family:
Tricholomataceae
Genus:
Paralepista

Raitelh. (1981)
Type species
Paralepista flaccida
(Sowerby) Vizzini (2012)

Naming history

There have long been differing opinions as to how mushrooms which were assigned to genus Lepista (sometimes also placed in genus Clitocybe) should be classified. The fungi in question all have a white or slightly pink/yellow spore print, finely warty spores, and easily separable gills.[1][2] In 1981 Jörg H. Raithelhuber identified as separate a subgroup having very crowded strongly decurrent gills and spores which are oval in section to almost spherical, including Lepista flaccida and Lepista gilva. He proposed this subgroup as a new genus Paralepista.[2][3] In the following years it was recognized at the level of a subgenus (also called "Lepista section Inversae" or "Lepista sect. Gilva), but not as a genus.[1][2]

Then in 2012 Alfredo Vizzini and Enrico Ercole published a paper which confirmed by DNA sequencing analysis that these mushrooms are a separate clade from other parts of Lepista and Clitocybe. The paper includes a detailed phylogram covering relevant species. Accordingly Vizzini again put forward Raithelhuber's name Paralepista at the genus level, together with a list of the species names which should belong to the genus.[2] The new genus is recognized by Species Fungorum,[4] and the Global Biodiversity Information Facility.[5]

Definition of the genus
Paralepista gilva

Paralepista shares the following characteristics with Lepista.[2]

  • A Clitocybe-like general shape.
  • A white or slightly pink/yellow spore print.
  • Spores with fine warts or spines.

The following features distinguish Paralepista from other Lepista fungi.

  • Gills which are very crowded and strongly decurrent.
  • Spores with oval cross-section (elongated to almost spherical).

Principal species

See Vizzini[2] and Species Fungorum for a complete list of species. "Basionym year" means the date of the original description of the species under its present specific name, whichever genus it belonged to at the time.

Name, author & date Principal synonym(s) Basionym year Notes
P. ameliae (Arcang.) Vizzini (2012) Lepista ameliae 1889 Yellow cap, found in Mediterranean region, Italy, Southern Germany.[6][7]
P. concentrica Raithelh. (1996) Lepista concentrica (Raithelh.) Consiglio & Contu (2003) 1996 Lepista, not Paralepista, is the preferred genus of this species.
P. flaccida (Sowerby) Vizzini (2012) Lepista flaccida, Lepista inversa, Clitocybe flaccida, Clitocybe inversa 1799 Common in Europe, sometimes regarded as two species. See the P. flaccida page for more details. This is the type species.[2]
P. gilva (Pers.) Vizzini (2012) Clitocybe gilva, Lepista gilva 1801 Yellowish cap, often spotted, quite common in Europe.[6][7]
P. inversa (Scop.) Raithelh. (1981) Lepista inversa[8] 1772 Generally considered to be part of P. flaccida, see the page of that species for more details.
P. lentiginosa (Fr.) Vizzini (2012) Agaricus lentiginosus 1838 There is a currently known mushroom named Lepista lentiginosa (Fr.) Bresinsky (1977),[9] but this belongs in genus Lepista, not Paralepista. Vizzini's Paralepista lentiginosa refers to a definition which is no longer identifiable.[10]

References
  1. Marcel Bon (1987). The Mushrooms and Toadstools of Britain and North-Western Europe. Hodder & Stoughton. p. 142. ISBN 0-340-39935-X.
  2. See Vizzini A; Ercole E (2012). "Paralepistopsis gen. nov. and Paralepista (Basidiomycota, Agaricales)" (PDF). Mycotaxon. 120 (1): 253–267. doi:10.5248/120.253. hdl:2318/124414. The authors provide a phylogram which indicates the evidence that Paralepista forms a separate clade.
  3. Jörg H. Raithelhuber (1981). Die Gattung Clitocybe (in German). Stuttgart: Metrodiana Press.
  4. "Paralepista flaccida page". Species Fungorum. Royal Botanic Gardens Kew. Retrieved 2017-02-25.
  5. The main entry is at "Paralepista flaccida (Sowerby) Vizz..." Global Biodiversity Information Facility. GBIF. Retrieved 2017-02-24.
  6. Courtecuisse, R.; Duhem, B. (2013). Champignons de France et d'Europe (in French). Delachaux et Niestlé. p. 214. ISBN 978-2-603-02038-8. Also available in English.
  7. Meinhard Moser (1983). Keys to Agarics and Boleti. Translated by Simon Plant. London: Roger Phillips. pp. 119–120. ISBN 0-9508486-0-3.
  8. For the original inversa name, see "Agaricus inversus page". Species Fungorum. Royal Botanic Gardens Kew. Retrieved 2017-02-21.
  9. "Lepista lentiginosa (Fr.) Brsky. 1976". Mycodb. Retrieved 2017-03-06.
  10. In Species Fungorum, Lepista lentiginosa is given as the current name; see "Lepista lentiginosa page". Species Fungorum. Royal Botanic Gardens Kew. Retrieved 2017-03-06. The Index Fungorum page gives the author as Maire, but also refers to Andreas Bresinsky, which is found elsewhere. Vizzini's combination Paralepista lentiginosa is distinct and probably a mistake.
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