Fungalpedia – Note 69 Claviradulomyces


Claviradulomyces P.R. Johnst., D.C. Park, H.C. Evans, R.W. Barreto & D.J. Soares

Citation if using this entry: Citation if using this entry: Fallahi et al. (2023) New genera in 2010-2011. Mycosphere (in prep)

Index FungorumFacesoffungi, MycoBankGenBank, Fig 1

Evans et al. (2010) introduced Claviradulomyces to accommodate an apothecial species Claviradulomyces dabeicola. The fungus has been collected continually and only on abnormal lenticels of Erythroxylum mannii Oliv., a rainforest tree in Africa (Ghana and Ivory Coast). Morphologically Claviradulomyces was referred to Odontotremataceae, Ostropales. Also, in both the parsimony and ML analyses based on the SSU, LSU, and mitochondrial SSU sequence data, Claviradulomyces was well-supported as a member of Ostropales, however, its position within the order was unresolved (Evans et al. 2010). However, Duarte et al. (2021) based on a Bayesian inference analysis of the LSU and rpb2 sequence data proposed Claviradulomyceae as a new family (Ostropales), and so far, Claviradulomyces is a monotypic family with seven species; Claviradulomyces dabeicola (Evans et al. 2010), Claviradulomyces xylopiae (Barreto et al. 2012), Claviradulomyces machaeriiClaviradulomyces schiniClaviradulomyces tabebuiaeClaviradulomyces vernoniae, and Claviradulomyces caseariae (Duarte et al. 2021)The asexual morph of Claviradulomyces produces black pycnidia with rostrate ostiole containing fusoid-filiform hyaline conidia. Ascomata appear on wobbly, whitish, gall-like tissue. Apothecial are loose, wall black, initially closed, opening by a round pore. Periphysoids coating the upper wall overhead at the level of the hymenium. Asci are non-amyloid, broad-cylindric, and eight-spored. It has decorated periphysoids and long, cylindric, sigmoid, acuminate ascospores (Evans et al. 2010Duarte et al. 2021). 


Fig 1Claviradulomyces xylopiae (Photo credits by Barreto et al. 2012). a Pycnidium with long rostrate ostiole. b Conidia. C Cross section of fully opened, apothecial ascoma. d Hymenium with parallel asci and paraphyses. Scale bars: a, b =50 μm; c =15 μm; d= 10 μm.


Type species: Claviradulomyces dabeicola P.R. Johnst., D.C. Park, H.C. Evans, R.W. Barreto & D.J. Soares 

Other accepted species:

Claviradulomyces caseariae L.L. Duarte, D.M. Macedo & R.W. Barreto 

Claviradulomyces machaerii D.M. Macedo & R.W. Barreto 

Claviradulomyces schini L.L. Duarte, D.M. Macedo & R.W. Barreto 

Claviradulomyces tabebuiae L.L. Duarte, D.M. Macedo & R.W. Barreto 

Claviradulomyces vernoniae L.L. Duarte, D.M. Macedo & R.W. Barreto 

Claviradulomyces xylopiae R.W. Barreto, H.C. Evans & P.R. Johnst.



Barreto RW, Johnston PR, Crous PW, Evans HC. 2012- A new species of the lenticel fungal genus Claviradulomyces (Ostropales) from the Brazilian Atlantic forest tree Xylopia sericea (Annonaceae). IMA fungus 3,135-41.

Duarte LL, de Macedo DM, Barreto RW. 2021- Cryptic but ubiquitous: Claviradulomyceae fam. nov. with five novel species of the lenticel fungus Claviradulomyces from Brazil. Cryptogamie, Mycologie 42, 121-35.

Evans HC, Johnston PR, Park D, Barreto RW, Soares DR. 2010- Claviradulomyces, a new genus of Odontotremataceae from West African rainforest. Fungal Biology 114, 41-8.


Entry by

Maryam Fallahi, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand.


(Edited by Kevin D Hyde and Ruvishika S. Jayawardena)