2009; Zhang et al. 2009a. Type species Katumotoa bambusicola Kaz. Tanaka & Y. Harada, Mycoscience 46: 313 (2005). (Fig. 41) Fig. 41 Katumotoa bambusicola (from HHUF 28663, holotype). a Ascomata scattered on the host surface. b Asci in pseudoparaphyses. c Hyaline ascospore with long terminal appendages. d Clavate ascus with a short pedicel. Scale bars: a = 0.5 mm. b–d = 20 μm Some information for the following description is from Tanaka and Harada (2005). Ascomata 240–330 μm high × 260–420 μm diam., scattered or in small groups, immersed, becoming erumpent, with

a slightly protruding papilla covered with brown hyphae, subglobose (Fig. 41a). Peridium 13–30 μm thick, composed of a few layers of lightly pigmented, depressed cells. Hamathecium of dense, long cellular pseudoparaphyses, 1.5–3 μm broad,

embedded selleckchem in mucilage, branching and anastomosing. Asci 110–160 × 17.5–24 μm (\( \barx = 139 \times 21\mu m \), n = 10), 8-spored, bitunicate, fissitunicate, cylindro-clavate with a short furcate pedicel which is up to 25 μm long (Fig. 41b and d). Ascospores 39–50(−57) × 7–10 μm (\( \barx = 45.8 \times 8.2\mu m \), n = 10), biseriate, fusoid to narrowly fusoid with acute ends, usually curved, apiosporus and hyaline when young, constricted at the primary septum, the upper cell longer and broader than the lower one, smooth, surrounded by a bipolar sheath which is up to 15 μm long, best seen Akt inhibitor in India ink, senescent ascospores yellowish brown, 2–4-septate (Fig. 41c). Anamorph: none reported. Material examined: JAPAN, Mt. Iwate, near Yakebashiri, Hirakasa, Nishine, Iwate, on culms of Oryza sativa L., 19 Oct. 2003, K. Tanaka (HHUF 28663, holotype). Notes Morphology Katumotoa was formally established by Tanaka and Harada (2005b) to accommodate the monotypic species, K. bambusicola, which is characterized by immersed ascomata with a thin peridium

comprising thin-walled compressed cells, cellular pseudoparaphyses, cylindro-clavate and fissitunicate asci and fusoid ascospores with an elongated bipolar mucilaginous sheath. Based on its immersed ascomata, psuedoparenchymatous peridium cells and cellular pseudoparaphyses, Katumotoa was assigned to Phaeosphaeriaceae (Tanaka Endonuclease and Harada 2005b; Tanaka et al. 2009), but this classification has been shown to be incorrect in subsequent phylogenetic studies (Tanaka et al. 2009; Zhang et al. 2009a). Phylogenetic study Phylogenetic analysis based on five genes (LSU, SSU, RPB1, RPB2 and EF1) indicates that Katumotoa bambusicola resides in Lentitheciaceae, and this receives high bootstrap support (Zhang et al. 2009a). In particular, K. bambusicola forms a robust clade with Ophiosphaerella sasicola (Nagas. & Y. Otani) Shoemaker & C.E. Babc., which has filliform ascospores (Shoemaker and Babcock 1989b).