Gnomoniopsis sanguisorbae
Gnomoniopsis sanguisorbae (Rehm) D.M. Walker, Mycologia 102(6): 1494 (2010)
Index Fungorum number: IF 515713; Facesofungi number: FoF 2800
Reference specimen: MFLU 15-1255
Saprobic on dead stem of Sanguisorba minor Scop. Sexual morph: Ascomata 320–432 μm high 9 397–466 μm diam. (x̄ = 388 × 442 μm, n = 5), immersed to semi-immersed, solitary, or in small groups, uniloculate, globose, conspicuous at the surface, black, without hairs, long ostiolate. Peridium 15–21 μm wide, comprising 3–4 layers of pale brown cells of textura prismatica. Hamathecium 0.5–1.2 μm wide, numerous, comprising dense, septate, unbranched, paraphyses. Asci 15–19 × 2–5 μm (x̄ = 17 × 4 μm, n = 25), 8-spored, bitunicate, fissitunicate, cylindric to cylindric-clave, short pedicellate, thin-walled, round at the apex. Ascospores 6–10 × 1–3 μm (x̄ = 9 × 2 μm, n = 20), overlapping 1–2-seriate, hyaline, 1-septate, constricted at the septum, first cell longer than second cell, round at the ends, guttulate, smooth-walled, lacking a mucilaginous sheath. Asexual morph: Undetermined.
Culture characteristics: Colonies on MEA, reaching 6 cm diam. after 7 days at 16 °C, producing dense mycelium, circular, rough margin white–gray with raised on media surface.
Material examined: ITALY, Premilcuore Province, Castel dell’ Alpe, on a dead stem of Sanguisorba minor (Rosaceae), 22 August 2014, Erio Camporesi, IT2058 (MFLU 15-1255, HKAS 94604, reference specimen designated here); living culture MFLUCC 15-0062.
GenBank: LSU: KY496735; ITS: KY496755; SSU: KY501123; TEF1: KY514399
Notes: Walker et al. (2010) chose a lectotype of G. sanguisorbae but their illustration is not clear. However, our phylogenetic tree shows that our strain groups with other strains of G. sanguisorbae. We also compared the morphology of our strain with G. sanguisorbae and found that it matches. We, therefore, designate G. sanguisorbae (MFLU 15-1255) as a reference specimen (sensu Ariyawansa et al. 2014).
Figure x. Gnomoniopsis sanguisorbae (MFLU 15-1255, reference specimen). a, b Appearance of ascomata on host substrate. c Section of ascoma. d Ostiole. e Section of peridium. F Pseudoparaphyses. g–i Ascus. j–m Ascospores. n Germinating ascospore. Note: stained with cotton blue in i, j, l, and m. Scale bars c = 100 μm, d, e = 10 μm, f = 2 μm, g–i = 5 μm, j–n = 2 μm.
References:
Ariyawansa HA, Hawksworth DL, Hyde KD, Jones EG, et al. 2014 – Epitypification and neotypification: guidelines with appropriate and inappropriate examples. Fungal Diversity 69, 57–91.
Tibpromma S, Hyde KD, Jeewon R, Maharachchikumbura SS, et al. 2017 – Fungal diversity notes 491–602: taxonomic and phylogenetic contributions to fungal taxa. Fungal diversity 83, 1–261.
Walker DM, Castlebury LA, Rossman AY, Sogonov MV, et al. 2010 – Systematics of genus Gnomoniopsis (Gnomoniaceae, Diaporthales) based on a three-gene phylogeny, host associations and morphology. Mycologia 102, 1479–1496.
Last update: 30 November 2021