Polyporales » Meripilaceae

Pseudonadsoniella

Pseudonadsoniella T.O. Kondr. & S.Y. Kondr. 2015, in Kondratyuk et al., Acta Botanica Hungarica, 57(3-4), 291-320 (2015).

Etymology: The genus is named after its similarity to the genus Nadsoniella, which was named after a well-known Russian microbiologist Georgi A.

Diagnosis: Anamorphic yeast-like fungus showing very slow growth on all nutrient media, while more or less good growth on Saburo agar medium and potato sections observed, in having only single or budding cells or cells groups, which do not form cell chains and any matrix is absent, forming only more or less dense brown or dark brown colouration of colony-like formations; true mycelium absent; assimilation of L-rhamnose, L-malate and xylitol registered; nitrification activity and sorbose assimilation absent.

Index Fungorum Number: IF813888

Type species: Pseudonadsoniella brunnea T.O. Kondr. & S.Y. Kondr. 2015, in Kondratyuk et al., Acta Botanica Hungarica, 57(3-4), 291-320 (2015).

Notes: Pseudonadsoniella is an anamorph genus defined by production of budding cells, very slow growth on all nutrient media and in containing melanin, as well as a phylogenetic affiliation to the basidiomycete order Polyporales where teleomorphs belong to a hitherto undescribed genus of the Miripilaceae. The new genus Pseudonadsoniella is similar to Nadsoniella Issatsch. After very slow growth on any nutrient media, in the lack of mycelium, and in the lack of nitrification activity, but it differs from the latter in having different growth on different media (i.e. showing the best growth on Saburo agar medium and potato sections), in having only single or budding cells or cells groups, which do not form cell chains (vs. cell chains are characteristic for Nadsoniella nigra), in having brown or dark brown colour of colony-like formations (vs. black or coal-black true colonies of in N. nigra), and in having teleomorphs in the Basidiomycota. From physiological point of view (from our data) the genus Pseudonadsoniella differs from the genus Nadsoniella in having L-rhamnose, L-malate and xylitol assimilation, as well as in the lack of sorbose assimilation.

Species:

Pseudonadsoniella brunnea T.O. Kondr. & S.Y. Kondr. 2015

Reference:

Kondratyuk, T. O., Kondratyuk, S. Y., Morgaienko, O. O., Khimich, M. V., Beregova, T. V., & Ostapchenko, L. I. (2015). Pseudonadsoniella brunnea (Meripilaceae, Agaricomycotina), a new brown yeast-like fungus producing melanin from the Antarctic; with notes on nomenclature and type confusion of Nadsoniella nigra. Acta Botanica Hungarica, 57(3-4), 291-320.

 

Recent Genus

Boreostereum
Boidinia
Australovuilleminia

Recent Species

Dictyocephalos attenuatus
Oliveonia fibrillosa
Tricholomella constricta