Huntiella Z.W. de Beer, T.A. Duong & M.J. Wingf., in de Beer, Duong, Barnes, Wingfield & Wingfield, Stud. Mycol. 79: 211 (2014)
Hypocreomycetidae, Microascales, Ceratocystidaceae, Huntiella
Index Fungorum number: IF810236; Facesoffungi number: FoF 08399; 18 morphological species (Species Fungorum 2020); 17 species with sequence data.
Saprobic or pathogenic on terrestrial hosts. Sexual morph: Ascomata perithecial, ellipsoidal, subglobose, globose to obpyriform or ovoid, basal part clothed with dark brown to black conical spines which are sometimes septate or pale brown, undifferentiated ornamental hyphae. Necks long, straight or curved, narrowing towards the apex, consisting of a disc-like base, dark brown to black at the base, gradually becoming paler towards apex, ostiolate. Ostiolar hyphae undifferentiated, straight to convergent, hyaline. Asci unitunicate, evanescent. Ascospores hyaline, aseptate, subglobose in face view, ellipsoidal in side view appearing as a hat, surrounded by hood-like gelatinous sheath. Asexual morph: Conidiophores macronematous, seldom branched, septate, sometimes reduced to conidiogenous cells. Conidiogenous cells hyaline, enteroblastic, usually of two types (primary and secondary), lageniform, giving rise to rectangular-shaped conidia and cylindrical, generating barrel-shaped conidia. Conidia aseptate, of two types: bacilliform and hyaline or barrel-shaped or oblong to ellipsoidal and hyaline to subhyaline to pale brown. Chlamydospores absent (adapted from de Beer et al. 2014, Marin-Felix et al. 2019).
Type species: Huntiella moniliformis (Hedgc.) Z.W. de Beer, T.A. Duong & M.J. Wingf., in de Beer, Duong, Barnes, Wingfield & Wingfield, Stud. Mycol. 79: 212 (2014)
Notes: Huntiella species occur on a wide range of hosts and are distributed worldwide on Acacia mangium in Indonesia, Eucalyptus obliqua in Australia, E. saligna in South Africa, Mangifera indica in Oman, Picea spinulosa in Bhutan (de Beer et al. 2014), Eucalyptus exserta, Acacia confusa in China (Liu et al. 2018), and Tectona grandis in Thailand (Hyde et al. 2020). The species are saprobes, weak pathogens and are also commonly found on tree wounds (Mbenoun et al. 2016, Liu et al. 2018). The presence of conical spines at the base of the ascomata, the fragile disciform base of the ascomatal necks and hat-shaped ascospores are distinguishable features of Huntiella (de Beer et al. 2014). While all other Huntiella species are known from both their sexual and asexual morphs, H. ceramica is the only one known in its asexual form (Marin-Felix et al. 2019).
Species illustrated in this entry:
Huntiella chinaeucensis (S.F. Chen bis, Jol. Roux, M.J. Wingf. & X.D. Zhou) Z.W. de Beer, T.A. Duong & M.J. Wingf.
de Beer ZW, Duong TA, Barnes I, Wingfield BD, Wingfield MJ. 2014 – Redefining Ceratocystis and allied genera. Study in Mycology 79, 187–219.
Hyde KD, Norphanphoun C, Maharachchikumbura SSN, Bhat DJ et al. 2020 – Refined families of Sordariomycetes. Mycosphere 11, 305–1059.
Liu F, Li G, Roux J, Barnes I et al. 2018 – Nine novel species of Huntiella from southern China with three distinct mating strategies and variable levels of pathogenicity. Mycologia 110, 1145–1171.
Marin-Felix Y, Restrepo HM, Wingfield MJ, Akulov A et al. 2019 – Genera of phytopathogenic fungi: GOPHY 2. Studies in Mycology 92, 47–133.
Mbenoun M, Wingfield MJ, Boyogueno AB, Amougou FN et al. 2016 – Diversity and pathogenicity of the Ceratocystidaceae associated with cacao agroforests in Cameroon. Plant pathology 65, 64–78.