Caloboletus calopus
Caloboletus calopus | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Fungi |
Division: | Basidiomycota |
Class: | Agaricomycetes |
Order: | Boletales |
Family: | Boletaceae |
Genus: | Caloboletus |
Species: | C. calopus
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Binomial name | |
Caloboletus calopus (Pers.) Vizzini (2014)
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Synonyms[1] | |
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Caloboletus calopus mycorrhizal | |
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Edibility is poisonous |
Caloboletus calopus,
Christiaan Persoon first described Boletus calopus in 1801. Modern molecular phylogenetics showed that it was only distantly related to the type species of Boletus and required placement in a new genus; Caloboletus was erected in 2014, with C. calopus designated as the type species. Although Caloboletus calopus is not typically considered edible due to an intensely bitter taste that does not disappear with cooking, there are reports of it being consumed in eastern Europe. Its red stipe distinguishes it from edible species, such as Boletus edulis.
Taxonomy
Caloboletus calopus was originally published under the name Boletus olivaceus by Jacob Christian Schäffer in 1774,[3] but this name is unavailable for use as it was later sanctioned for another species.[4] Johann Friedrich Gmelin's 1792 synonym Boletus lapidum[5] is also illegitimate.[6] Christiaan Hendrik Persoon described the mushroom in 1801;[7] its specific name is derived from the Greek καλος/kalos ("pretty") and πους/pous ("foot"), referring to its brightly coloured stipe. The German name, Schönfußröhrling or "pretty-foot bolete", is a literal translation. Alternate common names are scarlet-stemmed bolete[8] and bitter beech bolete.[9]
Other synonyms include binomials resulting from generic transfers to Dictyopus by
In his 1986 infrageneric
Description
Up to 15 cm (6 in) or rarely 20 cm (8 in) in diameter, the
The attractively coloured stipe is typically yellow above to pink-red below, with a straw-coloured network (reticulation) near the top or over the upper half;
Variety frustosus is morphologically similar to the main type, but its cap becomes areolate (marked out into small areas by cracks and crevices) in maturity. Its spores are slightly smaller too, measuring 11–15 by 4–5.5 µm.[21] In the European form ereticulatus, the reticulations on the upper stipe are replaced with fine reddish granules, while the variety ruforubraporus has pinkish-red pores.[14]
Similar species
The overall colouration of Caloboletus calopus, with its pale cap, yellow pores and red stipe, is not shared with any other bolete.[25] Large pale specimens resemble Suillellus luridus, and the cap of Rubroboletus satanas is a similar colour but this species has red pores. Fruit bodies in poor condition could be confused with Xerocomellus chrysenteron but the stipes of this species are not reticulated.[23] Edible species such as B. edulis lack a red stipe.[18] It closely resembles the similarly inedible C. radicans, which lacks the redness on the stipe.[25] Like C. calopus, the western North American species C. rubripes also has a bitter taste, similarly coloured cap, and yellowish pores that bruise blue, but it lacks reticulation on its reddish stipe.[26] Found in northwestern North America, B. coniferarum lacks reddish or pinkish colouration in its yellow reticulate stipe, and has a darker, olive-grey to deep brown cap.[19]
Two eastern North American species, C. inedulis and
Distribution and habitat
An
Biochemistry
Although it is an attractive-looking bolete, Caloboletus calopus is not considered edible on account of its very bitter taste, which does not disappear upon cooking.[39] There are reports of it being eaten in far eastern Russia and Ukraine.[40] The bitter taste is largely due to the compounds calopin[38] and a δ-lactone derivative, O-acetylcyclocalopin A. These compounds contains a structural motif known as a 3-methylcatechol unit, which is rare in natural products. A total synthesis of calopin was reported in 2003.[41] The frustosus variety is reported as causing severe sickness in Europe.[42]
The
See also
References
- ^ "Synonyms: Boletus calopus Pers., Syn. meth. fung. (Göttingen) 2: 513 (1801)". Species Fungorum. CAB International. Retrieved 2013-03-19.
- ISBN 978-0-89815-169-5.
- ^ Schäffer, J.C. (1774). Fungorum qui in Bavaria et Palatinatu circa Ratisbonam nascuntur Icones (in Latin and German). Vol. 4. Erlangen, Germany: Apud J.J. Palmium. p. 77; plate 105.
- ^ "Boletus olivaceus Schaeff., Fungorum qui in Bavaria et Palatinatu circa Ratisbonam nascuntur Icones, 4: 77, t. 105, 1774". MycoBank. International Mycological Association. Retrieved 2013-03-19.
- ^ Gmelin, J.F. (1792). Systema Naturae (in Latin). Vol. 2 (13 ed.). Leipzig, Germany: G.E. Beer. p. 1434. Archived from the original on 2013-11-03. Retrieved 2013-11-02.
- ^ "Boletus lapidum J.F. Gmel., Systema Naturae, 2: 1434, 1792". MycoBank. International Mycological Association. Retrieved 2013-03-19.
- ^ Persoon, C.H. (1801). Synopsis methodica fungorum (in Latin). Göttingen, Sweden: Dieterich. p. 513.
- ISBN 978-3-8331-1239-3.
- ^ Holden, E.M. (2003). "Recommended English Names for Fungi in the UK" (PDF). British Mycological Society. Archived from the original (PDF) on 2013-03-02.
- ^ Quélet, L. (1886). Enchiridion Fungorum in Europa media et praesertim in Gallia Vigentium (in Latin). Paris, France: Octave Dion. p. 160.
- ^ Maire, R. (1937). "Fungi Catalaunici: Series altera. Contributions a l'étude de la flore mycologique de la Catalogne". Publicacions del Instituto Botánico Barcelona (in French). 3 (4): 1–128 (see p. 46).
- JSTOR 3754732.
- ^ Miller, O.K. Jr.; Watling, R. (1968). "The status of Boletus calopus Fr. in North America". Notes from the Royal Botanic Garden Edinburgh. 28: 317–26.
- ^ a b Estadès, A.; Lannoy, G. (2001). "Boletaceae – Validations diverses". Documents Mycologiques (in French). 31 (121): 57–61.
- ISBN 978-3-87429-254-2.
- PMID 23931115.
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- ^ a b c Alessio, C.L. (1985). Boletus Dill. ex L. (sensu lato) (in Italian). Saronno, Italy: Biella Giovanna. pp. 153–56.
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- ^ Landeros, F.; Castillo, J.; Guzmán, G.; Cifuentes, J. (2006). "Los hongos (macromicetos) conocidos an at Cerro el Zamorano (Queretaro-Guanajuato), Mexico" [Known macromycetes from Cerro el Zamorano (Queretaro-Guanajuato), Mexico] (PDF). Revista Mexicana de Micologia (in Spanish). 22: 25–31.
- ^ Thiers, H.D. (1998) [1975]. "Boletus calopus". The Boletes of California. New York, New York: Hafner Press; MykoWeb (online version).
- ^ Sesli, E. (2007). "Preliminary checklist of macromycetes of the East and Middle Black Sea Regions of Turkey" (PDF). Mycotaxon. 99: 71–74.
- ^ Sarwar, S.; Khalid, A.N. (2013). "Preliminary Checklist of Boletales in Pakistan" (PDF). Mycotaxon: 1–12.
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