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 Oxychaete cervinogilva (Jungh.) Miettinen comb. nov. Figure 7 Polyporus cervinogilvus Jungh., Praemissa in floram cryptogamicam Javae insulae: 45 (1838). Description. Basidiocarp half-resupinate to pileate, annual, upper surface felt-like, yellowish brown with a lighter margin, lower surface brownish yellow or light ochraceous, 1-2 mm thick, caps projecting up to 3 cm, can fuse to form wide fruiting bodies. Consistency light cardboard-like when dry, somewhat flexible but easy to break apart. Pores regular, thin-walled, mouths rather smooth, (1)2-3 per mm. Cap context and subiculum yellowish brown, homogenous, upper surface not differentiated, up to 1 mm thick. Cap with a sharp, 1 mm wide sterile margin. Hyphal system monomitic, clamps absent. Hyphae homogenous throughout, mostly thick-walled, always with a wide lumen, rather stiff and straight, CB− to CB(+), IKI−, KOH−, CRB lilac. Encrustation absent except on cystidia. Subicular hyphae interwoven, loosely arranged, (3.2)4-5.4(7.5) µm in diameter, walls up to 1.5 µm thick, mostly ≤1 µm . Contextual hyphae mostly horizontally arranged but not strictly parallel, (3.8)4-5.1(5.5) µm in diameter. Tramal tissue loose and easy to study, hyphae rather straight, parallel in lower trama, subparallel and interwoven towards subiculum, (3)3.5-4.8(6.2) µm in diameter, walls mostly 0.8-1.2 µm thick. Subhymenial hyphae thin- to slightly thick-walled, richly branching mostly like a corymb, not much winding. Cystidia abundant, hymenial, thick-walled, often with an apical crystal cap, (15)20 -40(55)x4.5- 9, projecting 5-25 µm above hymenium. Hymenium dominated by basidioles and cystidia, cells with constrictions especially in older basidiocarps. Basidia cylindrical to narrowly clavate, collapsing upon spore release and difficult to spot, with 4 sterigmata. Cystidioles absent. Basidiospores cylindrical, curved, thin-walled, smooth, (5.9)6 -8.4(8.9)x2.8- 3.7(3.8) µm , L=6.93 µm , W=3.17 µm , Q'=(1.8)1.9- 2.5(2.6), Q=2.19, CB−, IKI−, plasma stains in CB. Figure 7. Microscopic characters of Oxychaete cervinogilvus , Schigel 5216, a subicular hyphae b tube trama and hymenium c hymenial cells d hymenial cystidia e spores. Distribution. Tropical Asia and Australia ( Ryvarden and Johansen 1980 ). Not common in Indonesia although described from there. Ecology. Apparently prefers small-diameter dead wood of angiosperms. According to the description, the type was collected in a wet, shady forest in Javanese mountains. Australian collections we have seen are from drier localities (monsoon forest and city park). Remarks. Junghuhn (1838) provides a good painting of the species (Tab. IX), available through Google books (https://books.google.fi/books?id=AFJUAAAAcAAJ).