Hallo Thorben und Werner,
es gibt "Dank" der Genetik inzwischen 24 (!) blauende Postia Arten. Es wird immer schwieriger, die Arten morphologisch zu unterscheiden.
Postia caesia complex (Polyporales, Basidiomycota) in temperate Northern Hemisphere
O. Miettinen*, J. Vlasák, B. Rivoire, V. Spirin 2018
doi.org/10.3114/fuse.2018.01.05
"Abstract: Taxonomy of the Postia caesia complex is revised based on morphology and two genetic markers, ITS and tef1.
In total, we recognize 24 species, multiplying the known species diversity in the complex. We provide descriptions for 20
temperate Northern Hemisphere taxa. Identity of the core species, P. caesia, is re-established, and a neotype from the
type locality is selected. Four new combinations are proposed, and 10 new species are described: P. arbuti, P. auricoma,
P. bifaria, P. comata, P. cyanescens, P. glauca, P. livens, P. magna, P. populi, and P. yanae."
LG
Frank
P.S. Ist vielleicht besser sich mit Kriechtieren zu beschäftigen. Da gibt es in Deutschland nur 13 Arten.