Polypores and genus concepts in Phanerochaetaceae (Polyporales, Basidiomycota) Author Miettinen, Otto Author Spirin, Viacheslav Author Vlasak, Josef Author Rivoire, Bernard Author Stenroos, Soili Author Hibbett, David S. text MycoKeys 2016 17 1 46 http://dx.doi.org/10.3897/mycokeys.17.10153 journal article http://dx.doi.org/10.3897/mycokeys.17.10153 1314-4049-17-1 Ceriporia mpurii Miettinen & Spirin sp. nov. Figures 10aand 11b, g Holotype. Indonesia. Papua Barat: Saukorem, Minjanbiat, -0.5755°: 133.1447°, low-land primary forest, fallen trunk of Spondias (40 cm in diameter, decay stage 4/5), 3 Nov 2010, Miettinen 14381 (H, ANDA, MKW). Etymology. Named after mpur, the people and language spoken around the type locality. Description. Basidiocarp 0.1-0.2 mm thick, up to 10 cm in the widest dimension. Pore surface cream-colored, in older parts with light gray hues, pores 5-6 per mm. Sterile margin narrow (up to 0.5 mm wide). Subicular hyphae irregularly arranged, 4.8-12.7 µm in diameter. Tramal hyphae 3.2-4.8 µm in diameter, in older parts glued together. Subhymenial hyphae 3-4 µm in diameter. Basidia 8.7 -11.2x3.9- 5.3 µm . Basidiospores ellipsoid to narrowly ellipsoid, ventral side mostly flat, very rarely slightly convex, (2.7)2.8 -3.9(4.2)x2- 2.3(2.4) µm , L=3.35 µm , W=2.15 µm , Q=1.55. Remarks. Ceriporia mpurii is very similar to Ceriporia humilis (see above), differing in slightly darker color of the basidiocarps and a bit rounder spores. Moreover, hyphae in older parts of tubes are densely arranged and glued together, while they are loosely arranged in Ceriporia humilis . Ceriporia mpurii is known so far from its type locality in New Guinea.