Paragaeumannomyces bombycinus (T.J. Atk., A.N. Mill. & Huhndorf) Reblova & A.N. Mill., 2020

Reblova, Martina, Nekvindova, Jana, Fournier, Jacques & Miller, Andrew N., 2020, Delimitation, new species and teleomorph-anamorph relationships in Codinaea, Dendrophoma, Paragaeumannomyces and Striatosphaeria (Chaetosphaeriaceae), MycoKeys 74, pp. 17-74 : 17

Paragaeumannomyces bombycinus (T.J. Atk., A.N. Mill. & Huhndorf) Reblova & A.N. Mill. comb. nov.

Basionym.

Chaetosphaeria bombycina T.J. Atk., A.N. Mill. & Huhndorf, New Zealand J. Bot. 45: 691. 2007.

Habitat and distribution.

The species has been collected on decaying wood of Nothofagus sp. and is known from New Zealand ( Atkinson et al. 2007).

Notes.

For description, illustration and holotype information, see Atkinson et al. (2007). Although P. albidus and P. bombycinus share identical ITS sequences and the size of their ascomata, asci and ascospores considerably overlap, the latter species was distinguished by characters in the ascomatal wall, ascoma appearance and ascospore septation. The ascomata of P. bombycinus are light fawn-grey and non-areolate when fresh, the ascomatal wall lacks the external melanised layer or the melanisation is only weakly present, and the black papilla is lacking or indistinct being covered by the outer layer. The ascospores of P. bombycinus are (7-)11(-13)-septate compared to (5-)7(-12)-septate ascospores of P. albidus . Atkinson et al. (2007) considered the ITS sequence identity uninformative in the light of distinct morphologies between the two species. Another explanation to this peculiar case could be that P. bombycinus is a described anomaly within P. albidus based on a single collection. More specimens of the " bombycinus " phenotype need to be examined, and their ITS and possibly other loci analysed.