Biology:Xerocomellus

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Short description: Genus of fungi

Xerocomellus
Xerocomus chrysenteron1.jpg
Xerocomellus chrysenteron
Scientific classification e
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Boletales
Family: Boletaceae
Genus: Xerocomellus
Šutara (2008)
Type species
Xerocomellus chrysenteron
(Bull.) Šutara (2008)
Species

See text

Xerocomellus is a genus of fungi in the family Boletaceae. The genus, as it was described in 2008, contained 12 species.[1] However X. rubellus and X. engelii were transferred to the new genus Hortiboletus and X. armeniacus was transferred to the new genus Rheubarbariboletus in 2015.[2][3] Molecular analysis supports the distinction of Xerocomellus species from Boletus and Xerocomus, within which these species were formerly contained. Xerocomellus in fact is only distantly related to Xerocomus and is most closely related to Tylopilus, Boletus sensu stricto, Porphyrellus, Strobilomyces, and Xanthoconium.[4]

Taxonomy

Members of the genus had been classified either in the genus Boletus or Xerocomus until Czech mycologist Josef Šutara examined a number of species and concluded that there was a defined group containing X. chrysenteron, X. armeniacus and relatives that are distinct morphologically from the group containing Xerocomus subtomentosus and related species. He deferred fully delimiting the genus until genetic work confirmed their distinctness.[1] Previously, Manfred Binder had coined the term Paraxerocomus for the group but this was not officially published.[1]

The type species is the red-cracked bolete (Xerocomellus chrysenteron).[1]

Genetic analysis published in 2013 showed that X. chrysenteron and X. zelleri form a Xerocomellus clade within a larger group informally called "anaxoboletus" in the Boletineae. It appears to have affinities with what was then known informally as the "rubellus clade", which contained the species X. rubellus and X. armeniacus, now known as Hortiboletus rubellus and Rheubarbariboletus armeniacus respectively.[2] The same study found Xerocomellus to be more distantly to a 'badius' clade containing Boletus badius, now known as Imleria badia, and relatives.[5] Other clades in the group include the porcini (true Boletus species) and Strobilomyces clades, species currently designated Xerocomus (the species are not true Xerocomus species), and smaller genera whose relationships are unclear.[4]

Description

Members of the genus have small to medium-size fruit bodies with more slender stipes compared with other boletes. They are often brightly coloured.[1] The caps are dry and do not become sticky when wet. Their cuticle tissue is a palisadoderm, comprising parallel or roughly parallel hypha arranged in an anticlinal fashion. The palisoderm, which is generally between 120 and 350 μm thick (although extremes of 80 μm and 500 μm are known), maintains its characteristic arrangement for longer periods than other boletes. The tubes are generally yellow and adnate or slightly decurrent. The pores are also yellow and quite large, up to 2.5 mm in diameter each and angular in shape. The spores are generally spindle-shaped to oval and have a smooth or striate surface. The spore print is brown or slightly olive-tinged when fresh.[1]

Morphological Features of Xerocomoid Boletes[1][6][7]

Boletus s.str. Hemileccinum Xerocomellus Xerocomus s.str.
Spore surface Smooth Smooth Longitudinally striated or smooth, never bacilate Bacilate
Hymenophoral trama Boletoid type with gelatinous lateral strata Boletoid type with gelatinous lateral strata Intermediate between boletoid and phylloporoid when fully developed with distinct but weakly gelatinous lateral strata Phylloporoid type with nongelatinous lateral strata
Pileipellis Trichoderm, sometimes collapsing, rarely ixotrichoderm or other Initially trichoderm but collapses with age Initially palisadoderm, typically encrusted Initially a trichoderm, never encrusted
Lateral stipe stratum Frequently gelatinous, 60–90 μm thick, thicker than that of Xerocomellus Similar to that of Leccinum species, ornamented with stipe scabrousities up to 400–640 μm thick Frequently not present, reduced to no more than 30–40 μm thick, not gelatinous Lateral stipe stratum never gelatinous and 80–200 μm thick

Ecology

Xerocomellus species form mycorrhizal associations with coniferous and deciduous trees.[1]

Species

Image Scientific Name Taxon author Year Basionym Distribution
X. amylosporus (A.H. Sm.) J.L. Frank & N. Siegel, 2020 Porphyrellus amylosporus A.H. Sm., (1965). Vancouver Island, British Columbia, Canada, south into California
X.  atropurpureus J.L. Frank, N. Siegel & C.F. Schwarz, 2020 British Columbia south at least to Monterey County, California along the coast, inland to the Sierra Nevada and Cascade Range
X.  behrii (Harkn.) Castellano, M.E. Sm. & J.L. Frank 2018 Splanchnomyces behrii Harkn., (1884). California and Oregon
X.  bolinii J.A. Bolin, A.E. Bessette, A.R. Bessette, L.V. Kudzma, J.L. Frank & A. Farid 2021 Florida[8]
X. carmeniae Garza-Ocañas, J. García & de la Fuente 2022 Mexico (Nuevo León)[9]
Xerocomellus chrysenteron G4.jpg X. chrysenteron (Bull.) Šutara 2008 Boletus chrysenteron Bull. (1791)[10] Taiwan
2012-08-26 Boletus cisalpinus (Simonini, H. Ladurner & Peintner) Watling & A.E. Hills 254673.jpg X. cisalpinus (Simonini, H.Ladurner & Peintner) Klofac[11] 2011 Xerocomus cisalpinus Simonini, H. Ladurner & Peintner (2003)[12] mainland Europe and in North America.
X. communis Xue T. Zhu & Zhu L. Yang 2016 China (Yunnan)
X. corneri Xue T. Zhu & Zhu L. Yang 2016 China
X.  diffractus N. Siegel, C.F. Schwarz, & J.L. Frank 2020 central California, through the Pacific Northwest into British Columbia, Canada, east to the Rocky Mountains of Wyoming, and south into Arizona
1996-02-15 Xerocomus dryophilus (Thiers) Singer 14.jpg X. dryophilus (Thiers) N. Siegel, C.F. Schwarz & J.L. Frank 2014 Boletus dryophilus Thiers North America.
X. fennicus (Harmaja) Šutara 2008 Boletellus fennicus Harmaja (1999)[13] Austria, Czech Republic, Denmark, Finland and Sweden, possibly also Belgium
X. fulvus Sarwar, I. Ahmad & Khalid 2016 Pakistan[14]
X. himalayanus D. Chakr and A. Ghosh 2023 India (Himachal Pradesh)[15]
X. intermedius (A.H. Sm. & Thiers) Svetash., Simonini & Vizzini 2016 Boletellus intermedius A.H.Sm. & Thiers (1971) Northeastern United States
X.  macmurphyi (Zeller & C.W. Dodge) Castellano, Saylor, M.E. Sm., & J.L. Frank 2018 Hymenogaster macmurphyi Zeller & C.W. Dodge, 1934. California and Oregon
2012-08-16 Xerocomellus marekii (Šutara & Skála) Šutara 309306.jpg X. marekii (Šutara & Skála) Šutara 2008 Boletus marekii Šutara & Skála (2007)[16] Czech Republic and Hungary
Xerocomellus mendocinensis.jpg X. mendocinensis (Thiers) N. Siegel, C.F. Schwarz & J.L. Frank 2020 Boletus truncatus (Singer, Snell, & Dick) Pouzar Western United States
Xerocomellus perezmorenoi Ajusco.jpg X. perezmorenoi Martínez-Reyes M, Carrera-Martínez A...

[17]

2023 Mexico
X. poederi G. Moreno, Heykoop, Esteve-Rav., P. Alvarado & Traba 2016 Europe
2012-08-16 Xerocomus porosporus (Imler- G. Morena & Bon) Contu 309289.jpg X. porosporus (Imler ex G.Moreno & Bon) Šutara 2008 Boletus porosporus Imler ex Bon & G.Moreno (1977)[18] Europe
2009-09-29 Xerocomellus pruinatus.jpg X. pruinatus (Fr. & Hök) Šutara 2008 Boletus pruinatus Fr. & Hök (1835)[19] Europe
X.  rainisiae (Bessette & O.K. Mill.) N. Siegel, C.F. Schwarz & J.L. Frank 2014 Boletus rainisiae Bessette & O.K. Mill. [as “rainisii”], in Bessette et al., 2000. Vancouver Island, British Columbia, Canada, south into Oregon.
2018-12-21 Xerocomellus redeuilhii A.F.S. Taylor, U. Eberh., Simonini, Gelardi & Vizzini 982281.jpg X. redeuilhii A.F.S. Taylor, U. Eberh., Simonini, Gelardi & Vizzini 2016 Boletus dryophilus Simonini, (1994)

Xerocomus dryophilus Ladurner & Simonini (2003)

Europe[20]
2013-07-17 Xerocomellus ripariellus (Redeuilh) Šutara 350064.jpg X. ripariellus (Redeuilh) Šutara 2008 Xerocomus ripariellus Redeuilh (1997)[21] Europe
X. salicicola C.F. Schwarz, N. Siegel & J.L. Frank 2020 Xerocomus salicicola C.F. Schwarz, N. Siegel & J.L. Frank (2020)[22] Western North America
X. sarnarii Simonini, Vizzini & Eberhardt 2015 Italy, France
X. truncatus (Singer, Snell & E.A.Dick) Klofac[11] 2011 Xerocomus truncatus Singer, Snell & E.A.Dick (1959)[23] Eastern North America
Xerocomellus zelleri (4037904836).jpg X. zelleri (Murrill) Klofac 2011[11] 2011 Ceriomyces zelleri Murrill (1912)[24] Northwestern North America

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Šutara J. (2008). "Xerocomus s. l. in the light of the present state of knowledge". Czech Mycology 60 (1): 29–62. doi:10.33585/cmy.60104. http://web.natur.cuni.cz/cvsm/CM60104F.pdf. 
  2. ↑ 2.0 2.1 Vizzini A. (26 June 2015). "Nomenclatural novelties". Index Fungorum: 1. ISSN 2049-2375. http://www.indexfungorum.org/Publications/Index%20Fungorum%20no.244.pdf. 
  3. ↑ Biketova, Alona Yu. (2 September 2015). "Nomenclatural novelties". Index Fungorum (257): 1. ISSN 2049-2375. http://www.indexfungorum.org/Publications/Index%20Fungorum%20no.257.pdf. 
  4. ↑ 4.0 4.1 "Phylogenetic overview of the Boletineae". Fungal Biology 117 (7–8): 479–511. 2013. doi:10.1016/j.funbio.2013.04.008. PMID 23931115. 
  5. ↑ Vizzini A. (12 June 2014). "Nomenclatural novelties". Index Fungorum (147): 1. ISSN 2049-2375. http://www.indexfungorum.org/Publications/Index%20Fungorum%20no.147.pdf. 
  6. ↑ Šutara, J. (1989). "The delimitation of the genus Leccinum.". Ceská Mykologie 43: 1–12. 
  7. ↑ Šutara J. (1991). "Pseudoboletus, a new genus of Boletales.". Ceská Mykologie 45 (1–2): 1–9. 
  8. ↑ Farid, Arian; Ae, Bessette; Ar, Bessette; Ja, Bolin; Garey, James R. (2021-10-12). "Investigations in the boletes (Boletaceae) of southeastern USA: four novel species and three novel combinations". Mycosphere (Mushroom Research Foundation) 12 (1): 1038–1076. doi:10.5943/mycosphere/12/1/12. ISSN 2077-7019. https://www.researchgate.net/publication/355186446. Retrieved 2023-12-24. 
  9. ↑ Garza-Ocañas, Fortunato; García Jiménez, Jesús; Guevara-Guerrero, Gonzalo; Martínez-González, Cesar Ramiro; Ayala-Vásquez, Olivia; De la Fuente, Javier Isaac (2022-06-21). "Xerocomellus carmeniae (Boletales, Basidiomycota), a new fungus from northeastern Mexico". Acta Botanica Mexicana (Instituto de Ecologia, A.C.) (129). doi:10.21829/abm129.2022.2039. ISSN 2448-7589. 
  10. ↑ Bulliard JBF. (1791) (in fr). Herbier de la France. 11. plate 490.3. 
  11. ↑ 11.0 11.1 11.2 Klofac W.. "Rotfußröhrlinge (Gattung Xerocomellus) in aktueller Sicht" (in de). Österreichische Zeitschrift für Pilzkunde 20: 35–43. 
  12. ↑ "Xerocomus cisalpinus sp. nov., and the delimitation of species in the X. chrysenteron complex based on morphology and rDNA-LSU sequences". Mycological Research 107 (6): 659–79. 2003. doi:10.1017/S0953756203007901. PMID 12951793. 
  13. ↑ Harmaja H. (1999). "Boletellus fennicus, a new species from Finland". Karstenia 39 (2): 37–8. doi:10.29203/ka.1999.335. 
  14. ↑ Hernández-Restrepo, Margarita; Schumacher, René K.; Wingfield, Michael J. (2016). "Fungal Systematics and Evolution: FUSE 2". Sydowia (Verlag Ferdinand Berger & Söhne GmbH) (68): 193–230. doi:10.12905/0380.sydowia68-2016-0193. ISSN 0082-0598. 
  15. ↑ Das, Kanad; Ghosh, Aniket; Chakraborty, Dyutiparna; Datta, Sudeshna; Bera, Ishika; Layola MR, Ranjith; Banu, Farheen; Vizzini, Alfredo et al. (2023-07-17). "Four Novel Species and Two New Records of Boletes from India". Journal of Fungi (MDPI AG) 9 (7): 754. doi:10.3390/jof9070754. ISSN 2309-608X. PMID 37504742. 
  16. ↑ "Boletus marekii, a new species with truncate spores from the Boletus chrysenteron group". Czech Mycology 59 (1): 11–24. 2007. doi:10.33585/cmy.59103. http://www.czechmycology.org/CM59102F.pdf. 
  17. ↑ MartíNez-Reyes, Magdalena; Carrera-MartíNez, Anaitzi; De La Fuente, Javier Isaac; RíOs-GarcíA, Uzziel; Ortiz-Lopez, Ivette; Ayala-VáSquez, Olivia (2023-02-14). "Xerocomellus perezmorenoi (Boletaceae, Boletales), a new edible species from Mexico". Phytotaxa 584 (2). doi:10.11646/phytotaxa.584.2.3. ISSN 1179-3163. https://www.biotaxa.org/Phytotaxa/article/view/phytotaxa.584.2.3. 
  18. ↑ Moreno G. (1977). "Nouveaux taxons de la famille Boletaceae Chev. trouvés en Espagne" (in fr). Documents Mycologiques 7: 27–8. 
  19. ↑ (in la) Boleti, fungorum generis, illustratio. Uppsala. p. 9. 
  20. ↑ G, Simonini; M, Gelardi; A, Vizzini (2016-10-01). "Xerocomellus redeuilhii sp. nov.". pp. 123–127. https://www.researchgate.net/publication/309202903. 
  21. ↑ Redeuilh G. (1997). "Xerocomus ripariellus Redeuilh". Documents Mycologiques 26 (104): 30–1. 
  22. ↑ Frank, J. L.; Siegel, N.; Schwarz, C. F.; Araki, B.; Vellinga, E. C. (15 December 2020). "Xerocomellus (Boletaceae) in western North America: Ingenta Connect". Fungal Systematics and Evolution 6 (1): 265–288. doi:10.3114/fuse.2020.06.13. PMID 32904489. PMC 7453129. https://www.ingentaconnect.com/content/wfbi/fuse/2020/00000006/00000001/art00014;jsessionid=1n88t8txpngid.x-ic-live-01#. Retrieved 2021-01-29. 
  23. ↑ "Notes on boletes. XI". Mycologia 51 (4): 564–77. 1959. doi:10.2307/3756143. http://www.cybertruffle.org.uk/cyberliber/59350/0051/004/0564.htm. 
  24. ↑ Murrill WA. (1912). "Polyporaceae and Boletaceae of the Pacific Coast". Mycologia 4 (2): 91–100. doi:10.2307/3753546. http://www.cybertruffle.org.uk/cyberliber/59350/0004/002/0091.htm. 

External links

Wikidata ☰ Q1230774 entry



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