Vibrissea brevistipitata
Vibrissea brevistipitata Ekanayaka & K.D. Hyde, IF:556283
Index Fungorum number: IF556283; Facesoffungi number: FoF 05885
Etymology – Refers to short stipitate apothecia
Holotype – MFLU 16-0597
Saprobic on dead leaf. Sexual morph: Apothecia 300–400 × 400–460 µm, arising singly, stipitate. Receptacle cupulate, black when dry. Disc concave. Ectal excipulum 25–30 µm (x = 20.3 µm, n = 10) in lower flanks, composed of, thin-walled, brown cells of textura angularis to globulosa. Medullary excipulum 10–15 µm (x = 13 µm, n = 10) in lower flanks, composed of, thin-walled, hyaline cells of textura oblita. Hymenium hyaline. Paraphyses 3–5 µm wide ( x = 3.8 µm, n = 20) at the apex, numerous, filiform, obtuse and slightly swollen at the apex, aseptate, exceeding the asci in length, smooth. Asci 150–200 × 5–10 µm ( x = 184 × 8 µm, n = 30) 8-spored, unitunicate, cylindric–clavate, rounded apex, non-amyloid, tapered and long stipitate base, croziers absent. Ascospores 120–150 × 1.4–2 µm (x = 135 × 1.7 µm, n = 40), 1–2-seriate, fusoid, threadlike, aseptate, hyaline. Asexual morph: Undetermined.
Material examined – Italy, Forlì-Cesena Province [FC], Fiumicello di Premilcuore, on dead land leaf of Quercus sp., 10 February 2014, Erio Camporesi, IT1718 (MFLU 16-0597).
GenBank accessions – ITS- MK584980
Notes – Our collection of Vibrissea clustered basal to Vibrissea filisporia- Vibrissea flavovirens clade with statistical support of 66% (Fig. 23). The ITS data of our collection is similar to that of Vibrissea filisporia (JLF2084) (517/557-93% with 4 gaps) and to Vibrissea truncorum (JLF2113) (513/558-92% with 5 gaps).
Our species is phylogenetically close to V. filisporia, but V. filisporia differs in having bluishgrey, yellow or ochraceous disc and septate paraphyses. Vibrissea norvegica is similar in having simple paraphyses, but differs in having shorter ascospores (Sanchez 1966). Vibrissea sporogyra differs in having branched paraphyses (Sanchez & korf 1966). Vibrissea decolorans differs in having amyloid asci (Sanchez 1966). Vibrissea albofusca differs in having long stipitate apothecia (Beaton & Weste 1983).
Morphology of Vibrissea brevistipitata (MFLU 16-0597 holotype) a Substrate. b, c Apothecia on leaf surface. d Cross section of an apothecium. e Close up of the cross section of apothecium at flanks. f Close up of the cross section of apothecium at flanks. g Filiform paraphyses. h–i Cylindric-clavate asci. j–k Thread-like ascospores. Scale bars: d = 100 µm, e–f = 20 µm, g = 30 µm, h–i = 50 µm, j–k = 30 µm.
Phylogram generated from maximum likelihood analysis of sequences of Vibrissea (Vibrisseaceae) based on ITS sequence data. MLBP values ≥50% are given near the nodes. Strain/culture numbers are given after the taxa. The tree is rooted with Chlorosplenium chlora (BHI F737a and BHI F736a).
References:
Ekanayaka AH, Hyde KD, Gentekaki E, McKenzie EHC, Zhao Q, Bulgakov TS, Camporesi E 2019 – Preliminary classification of Leotiomycetes. Mycosphere 10(1), 310–489, Doi 10.5943/mycosphere/10/1/7
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