Malmidea subaurigera
Malmidea subaurigera (Vain.) Kalb, Rivas Plata & Lumbsch, in Kalb, Rivas Plata, Lücking & Lumbsch, Biblthca Lichenol.106: 161 (2011), IF: 547072
Facesoffungi number: FoF05802
Lichenized on dead stem. Thallus: crustose, grey to green, turning orangish in KOH, granulose, rimose. Sexual morph: apothecia 0.2–0.7 mm wide, arising singly, sessile, slightly erumpent from the substrate, pulvinate, chocolate brown to grey-brown with clear thalline margins. Hypothecium convex. Hymenium hyaline, within a thick gelatinous matrix. Excipulum 50–60 µm wide, composed of black pigmented cells of textura intricata. Paraphyses 1.3–1.8 µm wide at the apex (x = 1.5 µm, n = 20), numerous, filiform, aseptate, slightly branched. Asci 45–65 × 12–18 µm (x = 52 × 14 µm, n = 30) 8-spored, narrowed to base, short stipitate, cylindric–clavate, rounded at the apex. Ascospores 12–15 × 6–7 µm (x = 14 × 6.3 µm, n = 40), hyaline, smooth walled, ellipsoid to fusoid, aseptate, guttulate. Asexual morph: Undetermined.
Material examined – Thailand, Chiang Rai Province, Rong Kwang, Phrae, on dead bark, 10
January 2018, A. H. Ekanayaka, HD079 (MFLU 18-0692, HKAS 104265).
GenBank accessions – ITS-MK499341, LSU-MK499354
Morphology of Malmidea subaurigera (MFLU 18-0692). a Substrate. b Ascomata on wood. c Cross section of an ascoma. d Close up of the excipulum at margins and flanks. e Aseptate paraphyses. f-h Short pedicellate asci. i Ellipsoid to fusoid ascospores. Scale bars: c = 100 µm, d = 50 µm, e-h = 25 µm, i = 5 µm
References:
Ekanayaka AH, Hyde KD, Jones EBG, Zhao Q, Bulgakov TS 2019 – New and known discolichens from Asia and eastern Europe. Asian Journal of Mycology 2(1), 48–86, Doi 10.5943/ajom/2/1/2
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