Phanerochaetella angustocystidiata (Sheng H. Wu) C.C. Chen & Sheng H. Wu, comb. nov. Fig. 41a

MycoBank  number: MB 840778; Index Fungorum number: IF 840778; Facesoffungi number: FoF;

Basionym: Phanerochaete angustocystidiata Sheng H. Wu, Botanical Bulletin of the Academia Sinica (Taipei) 41:166. 2000.

Description: See Wu (2000).

Specimens examined: CHINA. JILIN PROVINCE: Antu County, Erdaobaihe Town, Changbaishan, Dayangdi, 42°23ʹ N, 128°06ʹ E, 730 m, on gymnosperm branch, 7 Sep 2011, S.H. Wu, Wu 1109-56 (TNM F25605); ibid., Wu 1109-90 (TNM F25612). JAPAN. NAGANO PREFECTURE: Kita-saku District, Karuizawa Town, 36°21′32″ N, 138°37′50″ E, 967 m, on angiosperm branch, 28 Jul 2016, C.C. Chen & C. L. Chen, GC 1607-5 (TNM F30776); ibid., GC 1607-10 (TNM F30780). TAIWAN. Chiayi County, Alishan Town- ship, Nanhsi Forest Road, 23°28ʹ N, 120°54ʹ E, 1800 m, on angiosperm branch, 13 Jun 1996, S.H. Wu & S.Z. Chen, Wu 9606-39 (holotype of P. angustocystidiata, TNM F31321); Hualien County, Hsiulin Township, Taroko National Park, between 135–137 km of Provincial Highway No.8, 24°12ʹ N, 121°24ʹ E, 1878 m, on angiosperm branch, 23 Apr 2016, C.C. Chen, GC 1604-118 (TNM F31321); Nantou County, Jenai Township, Aowanta, 23°57ʹ N, 121°10ʹ E, 1200 m, on angiosperm branch, 12 Aug 2015, C.C. Chen, GC 1508-21 (TNM F29044); Taitung County, Haituan Township, on the way to Lulu Hot Spring, 800 m, on angiosperm branch, 22 Jan 2015, S.H. Wu, GC 1501-20 (TNM F28871).

Ecology and distribution: On angiosperm and gymno- sperm branch. Common in subtropical to temperate regions of East Asia [China, Japan, and Taiwan (type locality). Jun to Jan.

Notes: Phanerochaetella angustocystidiata is characterized by having ivory white to cream basidiocarps with smooth hymenophore, a basal layer of compact texture, presence of cylindrical to subulate lamprocystidia, and cylindrical basidiospores [(6.4–)6.7–7.7(–8.3) × (2.2–)2.6–3.1(– 3.3) μm, L = 7.2 μm, W = 2.8 μm, Q = 2.54 (n = 40) (Wu9606–39)]. It is most similar to P. leptoderma, but the latter has looser subiculum and comparatively narrower basidiospores (Wu 1990). This species is newly recorded from China and Japan.

Fig. 41 Basidiocarps of Phanerochaetella species in general and detailed views. a P. angustocystidiata (Wu 9606-39, holotype). b P. formosana

(Chen 3468, holotype). c P. leptoderma (Wu 880405-13, holotype). Bars = 10 mm