Dothideomycetes » Dothideomycetes, genera incertae sedis

Hypobryon

Citation: Pem D et al. (2019) Mycosphere Notes 275-324: A morphotaxonomic revision and typification of obscure Dothideomycetes genera (incertae sedis). Mycosphere 10(1), 1115–1246

Hypobryon Döbbeler, Nova Hedwigia 37(1): 3 (1983)

Saprobic on lower leaflets of Porella sp. Sexual morph: Ascomata globose to subglobose, black, scattered or in a group, superficial, carbonaceous, papillate. Peridium membranous composed of 2 layers of cells, the inner layer consisting of brown cells of textura angularis with the outer layer consisting of thicker dark-brown cells of textura globulosa. Hamathecium composed of dense, hyaline, pseudoparaphyses surrounding the asci. Asci not observed. Hymenium at the base is gelatinous. Ascospores ellipsoid, 4-celled, hyaline at first becoming pale brown at maturity, straight or slightly curved often slightly constricted. Asexual morph: Undetermined.

Type species – Hypobryon poeltii (Döbbeler) Döbbeler

Notes – The genus Hypobryon is a remarkable bryophilic genus characterized by hypophyllous ascomata which perforate the moss leaf to release ascospores on the upper surface. A combination of appressoria and intraparietal haustoria can be seen in this genus (Döbbeler 1983). The type species Hypobryon poeltii was found on Porella sp. (Porellaceae). Currently, seven species are accommodated in the genus Hypobryon. The asexual morph is unknown. Cultures and sequences are unavailable. We examined the holotype specimen of Hypobryon poeltii from GZU herbarium but could not observe all the morphological characters. Thus, we retain Hypobryon in Dothideomycetes genera incertae sedis. Fresh specimen with asexual morph link and sequence data would be required to provide exact placement for this genus.

References

Döbbeler P. 1983 – Hypobryon gen. nov. (Dothideales), eine bemerkenswerte Gattung bryophiler Pyrenomyceten. Nova Hedwigia 37, 1–17.

Hypobryon

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