Raciborskiella talaumae
Raciborskiella talaumae (Racib.) Höhn., Sber. Akad. Wiss. Wien, Math. -naturw. Kl., Abt. 1 118: 1176 (1909).
≡ Clypeolum talaumae Racib., Parasit. Alg. Pilze Java's (Jakarta) 3: 35 (1900).
Index Fungorum number: IF 432044; Facesoffungi number: FoF 12002, Fig. 1
Description:
Saprobic on leaves. Sexual morph: Ascomata 185–355 μm diam., 95–155 μm high, scattered, subglobose to globose, usually semi-immersed beneath host tissue, or erumpent, black, carbonaceous, with a slit-like ostiole. Peridium 15–30 μm, composed of dark brown thick-walled cells of textura epidermoidea. Hamathecium comprising 1.5–2.2 μm wide, anastomosing, trabeculate pseudoparaphyses, embedded in a gelatinous matrix. Asci 110−120 × 12−14 µm (x̄ = 111.5 × 13.4 µm, n = 20), 8-spored, bitunicate, fissitunicate, cylindrical to cylindric-clavate, short-pedicellate, rounded at the apex, with a small ocular chamber. Ascospores 15−22 × 4.5−5.8 µm (x̄ = 19.2 × 5.2 µm, n = 20), 2–3-seriate, fusiform to cylindrical, hyaline, uniseptate, not constricted at the septum, smooth walled with an appendage at the base, without mucilaginous sheath. Asexual morph: Unknown.
Material examined: China, Yunnan, Xishuangbanna, Meng-La County, Limestone Hill (Yen-shi-shan) near Meng-Lien; mixed, deciduous forest, alt. 670-770 m. on Machilus sp. (Lauraceae), 19 October 1980, Ove Eriksson (UME 33384).
Fig. 1 Raciborskiella sp. (UME 33384). a–d Herbarium material and appearance of ascomata on host surface. e Section through ascoma. f Peridium. g Trabeculate pseudoparaphyses. h–l Asci. m–q Ascospores. Scale bars: c = 5000 μm, d = 2000 μm, e = 40 μm, f–l = 20 μm, m–q = 10 μm.
Importance and distribution
Raciborskiella comprises two lichenized species. Raciborskiella talaumae is known from eastern paleotropical, Asia (Indonesia (Java), China), mainly in humid, semi-exposed forest habitats while R. janeirensis is known from living leaves in Asia (China).
References
Harris RC. 1995 – More Florida lichens. Including the 10c tour of the pyrenolichens. The New York Botanical Garden, Bronx.
Jiang SH, Lücking R, Xavier-Leite AB, Cáceres MES, Aptroot A, Portilla CV, Wei JC. 2020b – Reallocation of foliicolous species of the genus Strigula into six genera (lichenized Ascomycota, Dothideomycetes, Strigulaceae). Fungal Diversity 102, 257–291.
Lücking R. 2008 – Foliicolous lichenized fungi. Flora Neotropica monograph 103, 1–867.
McCarthy PM. 2009 – Strigulaceae. Fl Australia 57 (Lichens 5), 570–601.
Roux C, Sérusiaux E. 1995 – Présence d’appendices mucoïdes sur les ascospores de Raciborskiella janeirensis (Müll. Arg.) R. Sant. Le Bulletin de la Société linnéenne de Provence 46, 91–94.
Santesson R. 1952 – Foliicolous lichens I. A revision of the taxonomy of the obligately foliicolous, lichenized fungi. Symbolae Botanicae Upsalienses 12,1–590.
Sérusiaux E, Polly B. 1996 – Strigula kaitokensis sp. nov. from New Zealand. Mycotaxon 59, 245–251.
Singh A. 1970 – Strigula and Raciborskiella species from the Andaman Islands, India. Bryologist 73, 719–722.
Vězda A. 1984 – Foliikole Flechten der Insel Kuba. Folia Geobotanica & Phytotaxonomica 19, 177–210.
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