Corticioid species is macroscopically characterized by its orbicular to effuse basidiome, whitish to cream coloured with a pinkish tint; growing exclusively on bark of living Saxegothaea conspicua. Microscopically is characterized by its large bisterigmate basidia with lateral protuberances, paraphysoid encrusted hyphae, and globose basidiospores.
Uncobasidium roseocremeum is a rare corticioid fungi living on bark of Saxegothaea conspicua only known from the temperate Valdivian forests of Argentina and Chile, therefore it has a restricted distribution. Their only host is a near threatened species. Even reported as “quite frequent” on this substrate the number of records is low, indicating that it is not a common species.
The ongoing decline of its host tree of in combination with its fragmentation and rareness, results in it being assessed as Vulnerable (VU) under the criteria for B1 y B2a y b.
Temperate forests (Valdivian forests) of Argentina y Chile.
Population Trend: unknown. Possibly decreasing associated to the decrease of it host population by forest fragmentation and fires.
Population Trend: Uncertain
Growing on bark of living Saxegothaea conspicua.
The host, Saxegothaea conspicua is restricted in distribution and confined to national parks in Argentina. In Chile conversion of native forest in the Coastal Cordillera to commercial plantations of Pinus radiata and Eucalyptus, means that much of the habitat for this species has been lost and continues to disappear.
Unintentional effects: subsistence/small scale (species being assessed is not the target) [harvest]
Human intrusions & disturbance
Increase in fire frequency/intensity
Protection of habitat and host species.
Population size, distribution & trends
Gorjón S.P., Greslebin A.G., Rajchenberg M. 2012. Uncobasidium roseocremeum sp. nov. and other corticioid basidiomycetes from the Patagonian Andes of Argentina. Mycotaxon 121:349–364.