Ceriporia pierii Rivoire, Miettinen & Spirin

Miettinen, Otto, Spirin, Viacheslav, Vlasak, Josef, Rivoire, Bernard, Stenroos, Soili & Hibbett, David S., 2016, Polypores and genus concepts in Phanerochaetaceae (Polyporales, Basidiomycota), MycoKeys 17, pp. 1-46 : 30

Ceriporia pierii Rivoire, Miettinen & Spirin sp. nov. Figure 11

Holotype.

France. Rhône-Alpes: Vernaison, Populus nigra , 24 Sep 1995, Rivoire 1161 (H, LY).

Etymology.

Named after Max Pieri, who with Bernard Rivoire first discovered this species.

Description.

Basidiocarp 0.2-1 mm thick, 1-4 cm in the widest dimension. Sterile margin narrow (up to 1 mm wide). Pore surface cream-colored to rosy, in well-developed basidiocarps with apricot tints, pores 2-3(4) per mm, dissepiments mostly entire. Subicular hyphae more or less parallel to substrate, (5)5.1-8.2(9.1) µm in diameter; a few hyphae bearing incomplete clamps or inflated portions. Tramal hyphae 4-5.2 µm in diameter. Subhymenial hyphae 2.9-4 µm in diameter. Basidia 13.8 –19.3×4.4– 5.2 µm. Basidiospores ellipsoid to rarely cylindrical, ventral side flat or slightly concave, (3.9)4.1 –5.4(6.1)×2.4– 3.1(3.2) µm, L=4.72 µm, W=2.77 µm, Q=1.70.

Remarks.

Ceriporia pierii is introduced here to encompass Ceriporia davidii sensu Pieri and Rivoire (1997). Pieri and Rivoire identified Ceriporia camaresiana (Bourdot & Galzin) Bondartsev & Singer as the most similar species to Ceriporia pierii , but our data show that the two are not closely related (Figure 2). Basidiospores of Ceriporia camaresiana are clearly curved, mostly bean-shaped and longer, 5.26 × 2.74 µm (Table 5). Moreover, the hyphal structure is different: in Ceriporia camaresiana hyphae are mostly long-celled and not inflated, covered with small resinous droplets, and their diameter is approximately the same in all parts of the basidiocarp (3-4 µm in trama and 4-5 µm in subiculum).