Basidiocarps annual, resupinate, effused, easily broken when dry, up to 4 mm thick, separable, lacking sterile margin; pore surface light brown becoming straw-coloured (79.1.y Br - 76.1.y Br), pores angular 3-4 per mm, dissepiments entire, tubes concolorous with the pore surface, subiculum. very thin, white. Hyphal system dimitic; generative hyphae with clamps, thin-walled, hyaline, 2-3.5 µm diam.; skeletal hyphae hyaline, thick-walled to semisolid, sinuous to straight, 2-4 µm diam. Globules of a resinous substance are prominent amongst hyphae in microscopic preparations. Cystidia absent. Cystidioles fusoid, non-projecting, scattered among basidia, 9-14 x 3-11 µm. Basidia clavate, 4-sterigmate, with a basal clamp, 10-15 x 3.5-5 µm. Basidiospores allantoid, hyaline, smooth, IKI-, 4-5 x 1.2-1.5 µm. Causes a brown cubical wood rot.

New Zealand, known only from the type location.

SUBSTRATA: On unknown dead hardwood tree.

Basidiocarpi annui, resupinati, usque 4 mm crassi, margine sterili carentes; superficies pori primo brunneola deinde straminea; pori angulares, 3-11 per mm. Systema hyphale dimiticum; hyphae genitales fibulatae, tenuitunicatae, hyalinae, 2-3.5 µm diametro; hyphae skeletales hyalinae, crassitunicatae vet subsolidae, sinuosae vet rectae 2-4 µm diametro, globulis resinosis praeditae. Cystidia nulla. Cystidiola fusoidea, non projecta, 9-14 x 3-4 µm. Basidia clavata, 4-sterigmatophora, fibula basali praedita, 10-15 x 3.5-5 µm. Basidiosporae allantoideae, hyalinae, laeves, IKI-, 4.5 x 1.2-1.5 µm. Cariem brunneam cubiformem efficiens.

ETYMOLOGY: novaezelandiae, after the country of origin.
NOTES: A. novaezelandiae resembles A. sinuosa (Fr.) P.Karst. of the northern temperate zone, but is distinguished by the more regular and smaller, angular pores, an evenly straw-coloured pore surface, presence of a resinous substance throughout the basidiocarp, and somewhat smaller basidiospores (cf. A. sinuosa 4-6 x 1-2 µm, Ryvarden & Gilbertson 1993). A. sinuosa occurs almost exclusively on dry coniferous wood and is not irnowr from the Southern Hemisphere to our knowledge. A. xantha (Fr.: Fr.) Ryvarden, another species that occurs in New Zealand and elsewhere with E resupinate habit and allantoid spores, differs from A. novaezelandiae in having smaller pores (5-7 per mm), a yellow colour when fresh, lack of resinous material, and distinctly crumbly texture when dry.

HOLOTYPUS: New Zealand, Northland, Bay of Islands, Opua Forest, L. Ryvarden 37440, on dead hardwood, 12 Apr 1995 (PDD 70907; O - isotype).