Polyporus hyalinus Berk., Fl. Tasm. 2: 255, 1860.

Hymenophore annual, adherent, membranous, forming irregularly linear areas 4-10 x 2-4 cm, 0.1-3 mm thick. Hymenial surface at first white, becoming cream or honey yellow with a glassy appearance, even, often creviced; margin adherent, thinning out when sterile, or in some specimens terminating abruptly in a fertile face, arachnoid, irregular. Pores not in strata, round or angular, often oblique, 6-9 per mm (6-7 when young), 100-200 µm diameter, to 2.5 mm deep; dissepiments 50-75 µm thick, not toothed, even, equal. Context white, 100-200 µm thick, a densely intertwined layer of hyphae embedding numerous crystals; generative hyphae 2-2.5 µm diameter, walls 0.2 µm thick, branched, septate, with abundant clamp connections, embedded in mucilage. Hymenial layer to 15 µm deep, a dense palisade of basidia and paraphyses embedded in mucilage. Basidia clavate, 8-12 x 3-4 µm bearing 4 spores; sterigmata erect, delicate, to 3 µm long. Paraphyses ovate, oval, or clavate, 6-10 x 3-3.5 µm, Spores allantoid, 3-4 x 0.75-1 µm walls smooth, hyaline, 0.1 µm thick.

TYPE LOCALITY: Tasmania.
DISTRIBUTION: Australia, Tasmania, New Zealand.

Type: Xylophilous Fungi; Description: Ascomata perithecial, scattered, superficial, globose with a long neck, dark brown to black, 0.1–0.2 mm in diameter, perithecial necks straight or curved, black, becoming annulate at times, 350–1900 μm long, ostiolar hyphae divergent, septate, 16–65 μm long, hyaline; in bark beetle galleries in inner bark or outer sapwood and as hyphae in the sapwood. Asci evanescent. Ascospores allantoid, 0-septate, 3–5 × 1–1.5 μm, hyaline, oozing out of the ostiole and forming a spore ball at the tip. Conidiogenous cells denticulate. Conidia produced sympodially on the denticles, clavate, curved, 0-septate, 4–10 × 1–1.5 μm, smooth, hyaline.

Distribution: Auckland, Bay of Plenty, Taupo.; 1st Record: Hutchison & Reid (1988a).

Notes: Ceratocystis coronata should be placed in Ophiostoma but the combination has not yet been made.

Significance: None. Does not cause staining of wood.; Host(s): Pinus nigra subsp. nigra, P. radiata.