Index Fungorum no. 176

Effectively published 07/07/2014 12:20:35  (ISSN 2049-2375)

Nomenclatural novelties : Alfredo Vizzini

Cyanoboletus Gelardi, Vizzini & Simonini, gen.nov.
Basidiomes pileate-stipitate with tubular-poroid hymenophore, epigeal, small to medium-small, evelate; pileus tomentose to glabrous, dry to slightly tacky; hymenophore adnate to depressed around the stipe, yellow to olive-green; stipe surface smooth to pruinose, transversely streaked-scissurate or occasionally reticulate; context yellowish, often reddish-tinged at the base; tissues instantly discoloring dark indigo blue to blue-blackish when handled or injured; taste mild; spore print olive-brown; basidiospores smooth, ellipsoidal to ellipsoidal-fusoid; cystidia cylindrical-fusoid to ventricose-fusoid or lageniform; pileipellis a trichodermium; hymenophoral trama bilateral-divergent of the 'Boletus-type'; lateral stipe stratum of the 'boletoid type'; inamyloid trama; clamp connections absent; ontogenetic development gymnocarpic.
    Holotype: Boletus pulverulentus Opat. 1836.
Etymology: 'Cyanoboletus' (cyano = blue) is derived from Greek and refers to the deep ultramarine blue oxidation of the basidiomes

Cyanoboletus pulverulentus (Opat.) Gelardi, Vizzini & Simonini, comb.nov.
    Basionym: Boletus pulverulentus Opat., Arch. Naturgesch. 2(1): 27 (1836)

Cyanoboletus rainisii (Bessette & O.K. Mill.) Gelardi, Vizzini & Simonini, comb.nov.
    Basionym: Boletus rainisii Bessette & O.K. Mill., in Bessette, Roody & Bessette, North American Boletes A Color Guide to the Fleshy Pored Mushrooms (Syracuse): 145 (2000)

Cyanoboletus sinopulverulentus (Gelardi & Vizzini) Gelardi, Vizzini & Simonini, comb.nov.
    Basionym: Boletus sinopulverulentus Gelardi & Vizzini, Sydowia 65: 49 (2013)