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 –11.2×3.9– 5.3 µm . Basidiospores ellipsoid to narrowly ellipsoid, ventral side mostly flat, very rarely slightly convex, (2.7)2.8 –3.9(4.2)×2– 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.