Some interesting Boletales (Basidiomycota) from the state of Quintana Roo, Mexico

Coccoloba-associated xerocomoid boletes (Boletaceae) from the Caribbean and Mexico: Tropicoboletus ruborculus gen. et comb. nov., revision of Xerocomus coccolobae, phylogenetic assessment of Singerocomus guadelupae comb. nov., and type studies of Xerocomus caeruleonigrescens, X. cuneipes, and X. pseudoboletinus var. pini-caribaeae

“…This is the first verified report of X. coccolobae from the Dominican Republic. Xerocomus coccolobae has so far been reported from the Caribbean (Cuba, Dominican Republic, British Virgin Islands, and Martinique) and from Mexico (Veracruz, Quintana Roo, Yucatan) (Pegler 1983;García-Jiménez 1999;Minter et al 2001;Ortiz-Santana et al 2007;de la Fuente et al 2018de la Fuente et al , 2020. According to the present outcomes, the distribution of X. coccolobae should also be extended to south-eastern USA (Florida) in association with Coccoloba uvifera.…”

“…Xerocomus cuneipes can be discriminated from X. coccolobae by the smaller size (pileus up to 2.8 cm broad, stipe up to 2.4 × 0.4 cm), a stipe distinctly tapered at base and with a deep vinaceous brown tint in the lower half, abundant yellow basal mycelium, slightly larger basidiospores [(11.0-) 11.7 ± 0.5 (-12.5) × (4.5-) 5.3 ± 0.4 (-6.0) μm, Qm = 2.2] and shorter basidia (22-26 × 11-12 μm) (Pegler 1983). Xerocomus cuneipes in addition to the Lesser Antilles (Martinique) where it was firstly described (Pegler 1983) was repeatedly reported from Mexico (García-Jiménez 1999;García-Jiménez and Garza-Ocañas 2001;de la Fuente et al 2018de la Fuente et al , 2020 but not found in the Dominican Republic to date. Unfortunately, we were unable to generate DNA sequences from the type specimen of X. cuneipes due to its poor condition; however, according to morphological traits, it might be an additional representative of Xerocomus s. str.…”

“…Although it has not been as thoroughly investigated as North America and Europe, Mesoamerica has been the object of a large number of mycological contributions published in the past decades which have enhanced our understanding of the neotropical boletes diversity and biogeography with a special emphasis on boletoid or xerocomoid taxa, underpinning the health and functioning of different ecosystems in Mexico, mainland Central America, northern South America, and the Caribbean (e.g., Singer and Fiard 1977;Pegler 1983;Singer et al 1983;Singer 1988;Halling 1989Halling , 1992Halling , 1997Gonzáles-Velázquez and Valenzuela 1993;Gómez 1997;Halling and Mueller 1999, 2002García-Jiménez 1999, 2013Miller et al 2000;Minter et al 2001;Halling and Mata 2004;Flores Arzù and Simonini 2000;Franco-Molano et al 2000;García-Jiménez 2013;García-Jiménez et al 2013;Ortiz-Santana et al 2007;Courtecuisse and Welti 2013;de la Fuente et al 2018;Flores Arzù 2020). However, most of the neotropical bolete species described to date have been defined based solely on morphological, ecological, or biochemical taxonomic criteria and are in urgent need of phylogenetic reconsideration.…”

An annotated checklist of the macrofungi (Ascomycota, Basidiomycota, and Glomeromycota) from Quintana Roo, Mexico

“…Most species recorded for Quintana Roo are saprobic and very few mycorrhizal species can be found, mostly associated with Polygonaceae and Pinaceae. The most representative species are Amanita arenicola, Cantharellus coccolobae, Inocybe xerophytica, and Russula cremeolilacina, which are associated with Coccoloba uvifera trees in Mexico and the Antilles (Pegler 1983;de la Fuente et al 2018a); Lactarius nebulosus, associated with Polygonaceae trees in the Antilles and northern Mexico (Pegler and Fiard 1979;García and Valenzuela 2005); Boletellus cubensis, associated with Fabaceae and Polygonaceae (Singer et al 1993;Ortíz-Santana et al 2007) and Suillus decipiens, very common in Central America, Cuba, and Florida (Singer 1949;Singer et al 1983;Kropp 2001;Ortíz-Santana et al 2007) and also in Quintana Roo (de la Fuente et al 2018a).…”

Melanogaster coccolobae sp. nov. (Paxillaceae, Boletales), un hongo hipogeo tropical de las áreas urbanas de Quintana Roo, México

“…The ectomycorrhizal fungi from the tropics are still poorly studied in comparison with those from the template zones. Although several studies have been carried out in the Antilles and Central America about ectomycorrhizal fungi associated to Polygonaceae species (Pegler and Fiard, 1979;Pegler, 1983;Singer et al, 1983;Miller Jr. et al, 2000;Hasselquist et al, 2011;Põlme et al, 2017;de la Fuente et al, 2018), the knowledge about the fungi associated to Coccoloba spicata Lundell is still scarce in Mexico. Furthermore, C. spicata is a common tree of the disturbed vegetation, backyards and urban gardens in Quintana Roo state (Yucatán Peninsula, Southern Mexico).…”