Polyporales » Polyporales genera incertae sedis

Australohydnum

Australohydnum Jülich 1978, in Gorjón, Studies in Fungi 5(1), 167-168 (2020).

Current name: Irpex Fr., Systema orbis vegetabilis (Lundae), 81 (1825)

Diagnosis: Basidiome annual, resupinate to effuse-reflexed, membranaceous, adnate, context homogeneous, margin determinate, rhizomorphs or hyphal strands lacking. Hymenophore hydnoid. Hyphal system monomitic or indistinctly dimitic, hyphae simple-septate, hyaline, cylindrical, compactly arranged, thin-walled in the subhymenium, thick-walled in the trama, smooth. Cystidia (skeletocystidia) present, abundant, arising from thick-walled, clampless, generative hyphae, the projecting part loosely encrusted. Basidia clavate, with a simple basal septum. Basidiospores hyaline, more or less ellipsoid, thin-walled, smooth, not amyloid.

Index Fungorum Number: IF17140

Type Species: Australohydnum griseofuscescens (Reichardt) Jülich 1978

Notes: Australohydnum is phylogenetically related to phanerochaetoid fungi as Phanerochaete and Phlebiopsis (Larsson 2007). It shares with these genera the generative simple-septate hyphae, but it differs in the pseudodimitic hyphal system and in the presence of skeletocystidia.

 

Species:

Australohydnum castaneum (Lloyd) Zmitr., Malysheva & Spirin 2006

Australohydnum dregeanum (Berk.) Hjortstam & Ryvarden 1990

Australohydnum griseofuscescens (Reichardt) Jülich 1978

 

References:

Gorjón, S.P. (2020). Genera of corticioid fungi: keys, nomenclature, and taxonomy. Studies in Fungi 5(1), 125–309.

Larsson, K.H. (2007). Re-thinking the classification of corticioid fungi. Mycological Research 111(9), 1040–1063.

 

Recent Genus

Boreostereum
Boidinia
Australovuilleminia

Recent Species

Dictyocephalos attenuatus
Oliveonia fibrillosa
Tricholomella constricta