Fungalpedia – Note 480, Crocinoboletus

 

Crocinoboletus N.K. Zeng, Zhu L. Yang & G. Wu

Citation when using this data: Tibpromma et al. 2024 (in prep.) – Fungalpedia, Macrofungi.

Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1 

Classification: Boletaceae, Boletales, Agaricomycetidae, Agaricomycetes, Agaricomycotina, Basidiomycota, Fungi.

Crocinoboletus is a new genus that has been proposed to accommodate two species, Crocinoboletus rufoaureus and C. laetissimus, which were formerly named as Boletus rufoaureus and B. laetissimus, placed in the genus Boletus (Massee 1909, Hongo 1968, 1984, Horak 2011). Molecular and phylogenetic studies by Zeng et al. (2014) using nrLSU, RPB1, RPB2, and tef1-α revealed that B. rufoaureus and B. laetissimus formed well-supported separate lineage within Boletaceae, indicates that they are not the members of genus Boletus. Thus, a new genus, Crocinoboletus, and two new combinations of species, Crocinoboletus rufoaureus and C. laetissimus, were proposed. They are characterized by the brilliant orange color of basidiomata due to the presence of boletocrocin polyene pigments, bluish olivaceous staining of all parts when bruised, smooth basidiospores, and pileipellis, which has an interwoven trichoderm at the middle part of the pileus and a cutis at the margin of the pileus (Kahner et al.1998, Zeng et al. 2014).

Type species: Crocinoboletus rufoaureus (Massee) N.K. Zeng, Zhu L. Yang & G. Wu

Other accepted species: Species Fungorum – search Crocinoboletus

 

 

Figure 1 – Crocinoboletus species.  a Basidiomata of Crocinoboletus rufoaureus (HKAS 82333). b Crocinoboletus laetissimus (HKAS 59701). c Basidia and pleurocystidia of Crocinoboletus rufoaureus (HKAS 82333). d Basidiospores of Crocinoboletus rufoaureus (HKAS 82333). e Cheilocystidia of Crocinoboletus rufoaureus (HKAS 82333). F Pileipellis of Crocinoboletus rufoaureus (HKAS 82335). Scale bars: c–f = 10 μm. Redrawn from Zeng et al. (2014).

 

References 

Hongo T. 1968 – Notulae mycologicae (7). Memoirs of the Faculty of Liberal Arts and Education, Shiga University 18, 47–52.

Hongo T. 1984 – On some interesting boletes from the warm-temperate zone of Japan. Memoirs of the Faculty of Education, Shiga University. Natural Science 34, 29–32.

Horak E. 2011 – Revision of Malaysian species of Boletales s.l. (Basidiomycota) described by E.J.H. Corner (1972, 1974). Malayan Forest Records 51, 1–283.

Kahner L, Dasenbrock J, Spiteller P, Steglich W. et al. 1998 – Polyene pigments from fruit-bodies of Boletus laetissimus and B. rufo-aureus (basidiomycetes). Phytochemistry 49, 1693–1697.

Massee GE. 1909– Fungi exotici, IX. Bulletin of Miscellaneous Information of the Royal Botanic Gardens Kew, 204–209.

Zeng NK, Wu G, Li YC, Liang ZQ, et al. 2014 – Crocinoboletus, a new genus of Boletaceae (Boletales) with unusual boletocrocin polyene pigments. Phytotaxa 175(3), 133–140.

 

Entry by 

Harikrishnan K, National Fungal Culture Collection of India (NFCCI), Biodiversity and Palaeobiology Group, MACS Agharkar Research Institute, G.G. Agarkar Road, Pune 411004, India. 

 

(Edited by Rajeshkumar KC, Saowaluck Tibpromma, Samaneh Chaharmiri-Dokhaharani, & Achala R. Rathnayaka)

 

Published online 3 December 2024

Back to Glossary Index Page