Butyriboletus
Butyriboletus Arora & J.L. Frank, in Arora et al., Mycologia 106(3): 466 (2014)
Etymology: butyrum (L.) = butter
Basidiocarps epigeous and stipitate. Pileus mostly brown to reddish; tube layer yellow, often turning blue when bruised. Stipe yellow or reddish tinged and reticulate over the upper portion; context of pileus pale yellow, turning blue erratically if at all when cut; context of stipe often vinaceous-tinged at the base. Spores fusoid, smooth, brown (olive brown in mass). Pileipellis a trichodermium.
Index Fungorum number: IF803207
Type species: Butyriboletus appendiculatus (Schaeff.) D. Arora & J.L. Frank 2014, in Arora et al., Mycologia 106(3): 466 (2014)
Figure 1. ML tree illustrating phylogenetic relationships of species in the new genus Butyriboletus inferred from ITS nrDNA using fastDNAml. Tree topology corresponds to the optimal ML tree. Bootstrap values (˃ 50%) from the parsimony analysis (1000 replicates) using PAUP* are above branches.
Figure 2. Maximum likelihood tree generated in MEGA 5 with LSU nrDNA, showing the new genus Butyriboletus separate from the core group of Boletus s. str. The tree with the highest log likelihood is shown. Bootstrap values (˃50%) from the parsimony analysis (1000 replicates) using PAUP* are above branches.
Species
Butyriboletus abieticola (Thiers) D. Arora & J.L. Frank 2014
Butyriboletus appendiculatus (Schaeff.) D. Arora & J.L. Frank 2014
Butyriboletus autumniregius D. Arora & J.L. Frank 2014
Butyriboletus brunneus (Peck) D. Arora & J.L. Frank 2014
Butyriboletus cepaeodoratus (Taneyama & Har. Takah.) Vizzini & Gelardi 2014
Butyriboletus fechtneri (Velen.) D. Arora & J.L. Frank 2014
Butyriboletus floridanus (Singer) G. Wu, Kuan Zhao & Zhu L. Yang 2016
Butyriboletus frostii (J.L. Russell) G. Wu, Kuan Zhao & Zhu L. Yang 2016
Butyriboletus fuscoroseus (Smotl.) Vizzini & Gelardi 2014
Butyriboletus hainanensis N.K. Zeng, Zhi Q. Liang & Dong Y. An 2016
Butyriboletus huangnianlaii N.K. Zeng, H. Chai & Zhi Q. Liang 2019
Butyriboletus loyo (Phillippi) Mikšík 2015
Butyriboletus peckii (Frost) Kuan Zhao & Zhu L. Yang 2015
Butyriboletus persolidus D. Arora & J.L. Frank 2014
Butyriboletus primiregius D. Arora & J.L. Frank 2014
Butyriboletus pseudoregius (Heinr. Huber) D. Arora & J.L. Frank 2014
Butyriboletus pseudospeciosus Kuan Zhao & Zhu L. Yang 2016
Butyriboletus pulchriceps (Both, Bessette & R. Chapm.) Kuan Zhao & Zhu L. Yang 2015
Butyriboletus querciregius D. Arora & J.L. Frank 2014
Butyriboletus regius (Krombh.) D. Arora & J.L. Frank 2014
Butyriboletus regius f. aureus (M. Lamb. & Estadès) Klofac 2016
Butyriboletus regius f. regius (Krombh.) D. Arora & J.L. Frank 2014
Butyriboletus roseoflavus (M. Zang & H.B. Li) D. Arora & J.L. Frank 2014
Butyriboletus roseogriseus (Šutara, M. Graca, M. Kolařík, Janda & Kříž) Vizzini & Gelardi 2014
Butyriboletus roseopurpureus (Both, Bessette & Roody) Kuan Zhao, G. Wu, Halling & Zhu L. Yang 2015
Butyriboletus sanicibus D. Arora & J.L. Frank 2014
Butyriboletus subappendiculatus (Dermek, Lazebn. & J. Veselský) D. Arora & J.L. Frank 2014
Butyriboletus subsplendidus (W.F. Chiu) Kuan Zhao, G. Wu & Zhu L. Yang 2016
Butyriboletus taughannockensis I. Safonov 2017
Butyriboletus ventricosus (Taneyama & Har. Takah.) Vizzini & Gelardi 2014
Butyriboletus yicibus D. Arora & J.L. Frank 2014
Key Reference
Arora, David & Frank, Jonathan. (2014). Clarifying the butter Boletes: A new genus, Butyriboletus, is established to accommodate Boletus sect. Appendiculati, and six new species are described. Mycologia.106:3, 464-480 10.3852/13-052.
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