Yoshinagella japonica
Yoshinagella japonica Höhn., Fragm. Mykol. 122: 293 (1913).
Index Fungorum number: IF 248507; Facesoffungi number: FoF 12540, Fig. 1
Description:
Parasitic on upper surface of living leaves. Sexual morph: Ascostromata 650–890 μm diam., 230–350 μm high, solitary or ingroup, scattered to gregarious, superficial, cushion-like, flat, rounded, irregular at the margin, dark brown to black, coriaceous, flattened at the centre, carbonaceous. Locules 239–260 μm diam., 175–360 μm high, immersed in the ascostromata, arranged in a circular margin, globose to irregular. Wall of ascostromata 60–75 μm, two to three layered, with outer layer comprising large dark-brown cells of textura angularis, middle layer pale brown cells of textura angularis, inner layer hyaline cells of textura angularis. Peridium 20–35 μm, surrounding the locules, composed of small hyaline cells intermixed with ascogenous hyphae and pseudoparaphyses. Hamathecium 1.5–2.5 μm, comprising dense, septate, branched, cellular pseudoparaphyses, branching above the asci. Asci 50−102 × 7−11 µm (x̄ = 79.8 × 9.8 µm, n = 10), 8-spored, bitunicate, cylindrical, with a short furcate pedicel, apically rounded with a distinct ocular chamber. Ascospores 15−20 × 4.8−5.3 µm (x̄ = 18.2 × 5.1 µm, n = 10), 1-seriate, fusiform, pointed at the ends, hyaline, 3-septate, smooth-walled. Asexual morph: Unknown.
Material examined: see Japan, Seto Inland Sea, Shikoku, Inosawa, Agekura-mura, Tosa, on leaves of Quercus stenophylla (Fagaceae), 1 June 1916, T. Yoshinaga (BISH 608789, reference specimen designated here).
Fig. 1 Yoshinagella japonica (BISH 608789, reference specimen designated here). a, b Herbarium material. c, d Appearance of ascomata on host surface. e Section through ascomata. f, g Peridium. h Cellular pseudoparaphyses. i–k Asci. l–q Ascospores (l–o: stained in Congo red). Scale bars: c = 1000 μm, d = 500 μm, e = 200 μm, f = 30 μm, g = 100 μm, h = 10 μm, i–k = 50 μm, l–q = 20 μm.
Importance and distribution
Yoshinagella comprises two species known on Pasania glabra (Fagaceae), Phyllostachys bambusoides (Poaceae), Quercus glauca (Fagaceae) and Sasa veitchii sp. (Poaceae) in Asia (Japan). Three species have been transferred to Coccodiella and Coccostroma.
References
Dai DQ, Bahkali AH, Bhat DJ, Xiao YP et al. 2014 – Towards a natural classification of Dothideomycetes 3: The genera Muellerites, Trematosphaeriopsis, Vizellopsis and Yoshinagella (Dothideomycetes incertae sedis). Phytotaxa 176, 18–27.
Eriksson O. 1981 – The families of bitunicate ascomycetes. Nordic Journal of Botany 1, 7–218. http://dx.doi.org/10.1111/j.1756-1051.1981.tb01167.x
Hyde KD, Jones EBG, Liu JK, Ariyawansa H et al. 2013 – Families of Dothideomycetes. Fungal Diversity 63, 1–313.
Inácio CA, Cannon PF. 2002 – Re-interpretation of Cocconia palmae, with description of the genus Dianesea (Ascomycota: Dothideomycetidae). Fungal Diversity 9, 71–79.
Sivanesan A, Hsieh W. 1995 – A re-appraisal of the systematic status of the ascomycete genus Yoshinagaia. Mycological Research 99, 1295–1298.
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