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Page number:216 
Description type:Non-original description 
Description:Melanoporia castanea (Imazeki) T. Hattori & Ryvarden, Mycotaxon 50:29. 1994.
Basionym: Fomitopsis castanea Imazeki, Bull. Gov. Forest Exp. Sta. Tokyo 42:1. 1949. Type: Japan. Nagano, Kitasaku, 10.X.1947 Imazeki (TFM-F 346, studied). - Phellinus quercinus Bondartsev & Ljub., Novosti Sist. Nizsh Rast. 1965:141. Type: Russia. Primorye Terr., Nadezhdinsky Distr., on Quercus, 14.V.1950 Lyubarsky (LE 22516, studied).
Hattori and Ryvarden (1994:29) illustrated the species and gave a modern description. There is a colour picture of the species in Imazeki et al. (1988:481). We have studied types of both Phellinus quercinus and Fomitopsis castanea, and they are totally the same although both are sterile. The type material of P. quercinus has alien spores which are globose, rough, and thick-walled. So we suspect that the spores in the type description deal with such spore contaminations. Four specimens were collected from Changbai Mts.; three of them are fertile and in good condition. The spores in our material are oblong-ellipsoid, (3.7-)3.8-4.5(-5) x 1.8-2.2 µm, L=4.08 µm, W=2.00 µm, Q=2.04 (n=31/1). In the microscope skeletal hyphae are very compact and strong, thick-walled, rarely simple-septate, dark brown and dominate in both context and trama. They are very similar to the hyphoid setae of Phellinidium (Kotl.) Fiasson & Niemelä (Dai 1995). Basidiocarps of M. castanea are perennial, woody hard, purplish dark, and become black in KOH, and these characters make it remind Phellinus Quél. However, C. castanea has clamped generative hyphae, and causes a brown rot, and so it cannot be included in Phellinus s. lat.
Melanoporia castanea is very similar to M. nigra (Berk.) Murrill which was reported from the U.S.A. only. However, M. castanea has distinctly pileate basidiocarps and thick, matted dissepiments; it does not have cystidioles, its skeletal hyphae are unchanged in KOH, and its spores are oblong-ellipsoid. On the contrary, M. nigra has almost always resupinate basidiocarps and its dissepiments tend to be thin and lacerate; it has cystidioles, its skeletal hyphae (from the type) are distinctly swollen, 4-5(-6) µm in diam in CB (n=30/1), and 6-9(-10) µm in diam in KOH (n=30/1). We did not find spores from the type and from another specimen in H (see the list). Lowe (1966) mentioned that its spores are broadly ellipsoid to oval, 3-4 x 2-3 µm.
Melanoporia castanea is a rather common species in the Changbai Mts. area. In the field it is easily recognized by its large, purplish black basidiocarps, which are apparently receding each year, and by its growth exclusively on Quercus. It is distributed in Japan, the Russian Far East and northeastern China.
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