Microascales » Ceratocystidaceae » Huntiella

Huntiella chinaeucensis

Huntiella chinaeucensis (S.F. Chen, M. van Wyk, M.J. Wingf. & X.D. Zhou) Z.W. de Beer, T.A. Duong & M.J. Wingf., comb. nov. MycoBank MB810320.

Basionym: Ceratocystis chinaeucensis S.F. Chen, M. van Wyk, M.J. Wingf. & X.D. Zhou, Fungal Diversity 58: 274. 2013.

 

Description: Colonies white on malt extract agar. Mycelium aerial. Optimal growth temperature range 25–30 °C, with no growth at 5 °C. Hyphae smooth or granulated, not constricted at septa. Ascomatal bases dark brown to black, globose to obpyriform, ornamented with spines and hyphae, spines dark brown to black, (5–)6–13(–17) μm long, bases (166–)212–271(–315) μm in width, (196–)232–304(–355) μm in length. Ascomatal necks dark brown to black, (28–)32–51(–72) μm wide at base, (12–)14–22(–28) μm wide at the apex, (333–)410–551(–629) μm in length, with a disc-like base. Ostiolar hyphae divergent, hyaline, (20–) 24–37 (–47) μm long. Asci not observed. Ascospores hat-shaped in side view, aseptate, hyaline, invested in sheath, 3–4 μm in length, 6–8(–9) μm wide with sheath, (4–)5–6 μm wide without sheath. Ascospores accumulating in buff-yellow (19 d) mucilaginous masses at the apices of ascomatal necks.

 

 

 

Figure X. Huntiella chinaeucensis (Material examined: THAILAND, Chiang Rai Province, Mae Suai District, Mae Lao garden, on stumps of Tectona grandis L. (Lamiaceae), M. Doilom, MFLU 15-3204). a Ascomata on Tectona grandis wood b, c Globose ascomata with long necks with subhyaline to cream masses at tips of ascomata necks on teak wood d Immature globose ascoma e Ascomata base with conical spines f Ascoma neck g Hat-shaped ascospores being released from ostiolar hyphae h Globose ascoma with ascoma neck i Hat-shaped ascospores j Cylindrical conidia k Conidiophores with conidiogenous cells Scale bar b–c = 500 μm, d, h = 100 μm. e–g = 20 μm, i, j = 5 μm, k = 10 μm

 

 

References: Chen SF, van Wyk M, Roux J, Wingfield MJ, (2013) Taxonomy and pathogenicity of Ceratcystis species on Eucalyptus trees in South China, including C. chinaeucensis sp. nov. Fungal Divers 58:267–279.

 

De Beer ZW, Duong TA, Barnes I, Wingfield BD, (2014) Redefining Ceratocystis and allied genera. Studies in Mycology 1:79:187-219.

 

Maharachchikumbura SS, Hyde KD, Jones EG, McKenzie EH, (2016) Families of sordariomycetes. Fungal Diversity 79(1):1-317.

 

 

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