Melaspilea arthonioides
Melaspilea arthonioides (A. Massal.) Nyl., Act. Soc. linn. Bordeaux 21(4): 416 (1857) [1856]
≡ Catillaria arthonioides A. Massal., Geneac. lich. (Verona): 19 (1854)
Index Fungorum number: IF 155954; Facesoffungi number: FoF 11924 , Fig. 1
Description:
Saprobic on host. Sexual morph: Ascomata 630–650 μm diam., 250–275 μm high, apothecioid, black, lirelliform, aggregated or solitary, initially perithecioid and immersed in host thallus becomes apothecioid and superficial when mature. Exciple 12–19 μm, paraplectenchymatous. Hymenium 90–136 μm, hyaline to brownish. Subhymenium hyaline, c. 19–25 μm. Epihymenium 30–45 μm, dark brown pigmented. Paraphyses 1.5–3.2 μm, sparsely branched, septate, constricted at the septa hyaline. Asci 55–85 × 10–15 μm (x̄ = 70.6 × 13.1 µm, n = 10), 8-spored, clavate to cylindric clavate, wall apically strongly thickened, with a distinct ocular chamber. Ascospores 12.8–14.5 × 5.2–8 μm (x̄ = 13.7 × 6.2 µm, n = 10), uniseptate, hyaline, strongly constricted at the septa, smooth-walled. Asexual morph: Unknown.
Material examined: France, on dead stem (BR5030050227787).
Fig. 1 Melaspilea arthonioides (BR5030050227787). a–c Herbarium material. d Section through ascomata. e Peridium. f Cellular pseudoparaphyses. g–i Asci. j–l Ascospores. Scale bars: c = 500 μm, d = 200 μm, e–i = 50 μm, j–l = 10 μm.
Importance and distribution
Melaspilea forms part of a rich, mid elevation, shade epiphytic lichen community dominated by crustose Betulaceae, Coenogoniaceae, Graphidaceae, Ramalinaceae, and Pertusariaceae. Melaspilea has a worldwide distribution.
References
Ertz D, Diederich P. 2015 – Dismantling Melaspileaceae: a first phylogenetic study of Buelliella, Hemigrapha, Karschia, Labrocarpon and Melaspilea. Fungal Diversity 71, 141–164.
Hongsanan S, Hyde KD, Phookamsak R, Wanasinghe DN et al. 2020b − Refined families of Dothideomycetes: orders and families incertae sedis in Dothideomycetes. Fungal Diversity 105, 17–318.
Nylander W. 1857 − Prodromus lichenographiae Galliae et Algeriae. Actes de la Société Linnéenne de Bordeaux 21, 249–461.
Wijayawardene NN, Hyde KD, Rajeshkumar KC, Hawksworth DL et al. 2017 – Notes for genera: Ascomycota. Fungal Diversity 86, 1–594.
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