Cantharellus furcatus Bandala, Montoya & Ramos, 2021

Montoya, Leticia, Herrera, Mariana, Bandala, Victor M. & Ramos, Antero, 2021, Two new species and a new record of yellow Cantharellus from tropical Quercus forests in eastern Mexico with the proposal of a new name for the replacement of Craterellus confluens, MycoKeys 80, pp. 91-114 : 91

Cantharellus furcatus Bandala, Montoya & Ramos nom. nov.

Craterellus confluens Bas. Craterellus confluens Berk. & M.A. Curtis, J. Linn. Soc., Bot. 9: 423 (1867).

Cantharellus confluens Syn. Cantharellus confluens (Berk. & M.A. Curtis) R.H. Petersen, Sydowia 32: 201 (1979) nom. illeg.

Cantharellus confluens Non Cantharellus confluens (Schwein.) Schwein., Trans. Am. Phil. Soc., New Series 4: 153 (1834).

Merulius confluens = Merulius confluens Schwein., Schr. Nat. Ges. Leipzig 1: 92 (66 in reprint) (1822).

Byssomerulius corium = Byssomerulius corium (Pers.: Fr.) Parmasto, Eesti NSV Tead. Akad. Toim., ser Biol. 16: 383 (1967).

Holotype.

Mexico. Veracruz, Orizaba. Botteri 6 [ex herb. M.J. Berkeley] KM 173247 (K).

Gene sequences ex-holotype.

nLSUMT371345.

Etymology.

From Cantharellus furcatus (Lat.): forked, referring to a bifurcation developed in the basidiome.

Remarks.

Presumably having been separated from the entire collection, the holotype specimen consists of a single unipileate basidiome but the diagnostic feature mentioned by Berkeley (1867) “… stem divided above into numerous pilei …”, a feature practically not observed in close related species ( C. flavolateritius , C. lateritius , C. veraecrucis ) is present, as noted and depicted by Burt (1914), in the isotype collection at Farlow Herbarium (https://huh.harvard.edu/pages/farlow-herbarium-fh), and it is well-depicted and described for collections from SE USA studied by Petersen (1979). The particularity of producing multipileate basidiomes and/or with fused stipes, in combination with the smooth pileus surface, pileus and hymenophore predominantly orange colored (aurantiacus in the diagnosis) hymenophore rugulose, irregularly forking and anastomosing, rarely smooth, with yellow stipe and lacking pinkish shades ( Petersen 1979), are the distinctive macroscopic features of C. furcatus .

The holotype specimen Botteri 6 (at K) of Cr. confluens was preserved in such a poor condition that it does not allow a proper rehydration of the tissues. The microscopic features recovered were: basidiospores of 7.5-8.5 × 5-6 µm (X - = 7.8 × 5.3 µm), Q - = 1.46, broadly ellipsoid to ellipsoid, some subglobose, somewhat flattened adaxially, smooth, hyaline, thin-walled, inamyloid. Pileipellis a cutis composed of cylindrical hyphae 5-7 µm diam, compactly arranged, hyaline, yellowish colored in group; terminal hyphae 36-57 × 8-12 µm, clavate to broadly clavate, scattered, smooth, hyaline, inamyloid, thin to thick-walled (<1 µm thick). Clamp connections present (Fig. 6 ). In the holotype Petersen (1979) registered basidiospores of 6.7-8.9 × 4.8-5.9 µm, Q - = 1.29-1.54 and of 7-10 × 5-6.3 µm, while in the isotype collection there is an annotation made in 1980 by Dr. H.E. Bigelow, describing basidiospores: 8-10 × 5.5-6.5 µm, ellipsoid or broadly ellipsoid or subglobose, smooth, inamyloid, basidia mostly collapsed, ± 41-52 × 6-7.5 µm, pileus with hyphae 4-10 µm diam, clamped, pigment apparently intracellular (https://huh.harvard.edu/pages/farlow-herbarium-fh).

Figures

Figure 6. Cantharellus furcatus (Botteri 6, holotype of Craterellus confluens) a basidiospores b terminal elements of the pileipellis. Scale bars: 5 μm (a); 10 μm (b).