Duebenia subcompta
Duebenia subcompta Ekanayaka & K.D. Hyde.
Index Fungorum number: IF556301; Facesoffungi number: FoF 05939.
Etymology – refers to the similarity the species Duebenia compta
Holotype – MFLU 16-0600
Saprobic on dead stems. Sexual morph: 625–635 × 225–235 µm (x = 630 × 231 µm, n = 10), arising singly or in small groups, sessile, slightly erumpent from the substrate, turbinate, yellow, orange when fresh, brownish yellow when drying. Receptacle concave, disc and the margins are yellow to light brown when fresh. Ectal excipulum 33–38 µm at flanks ( x = 34.6 µm, n = 10), composed of pigmented, thick- and granulate-walled, yellow cells of textura prismatica. Medullary excipulum 22–26 µm at flanks ( x = 23.4 µm, n = 10), composed of narrow, long, thinwalled, yellow cells of textura epidomoidea. Hymenium hyaline. Paraphyses 3–4 µm wide at the tip (x = 3.5 µm, n = 20), numerous, filiform, obtuse, enlarged at the apex, septate, arising from croziers. Asci 35–45 × 3.5–5 µm (x = 39.8 × 4.5 µm, n = 30), 4–8-spored, short-pedicellate, unitunicate, cylindric-clavate, conical at the apex, non-amyloid, arising from croziers. Ascospores 6–10 × 2.3–3.2 µm (x = 8.4 × 2.8 µm, n = 40), uniseriate, hyaline, smooth-walled, clavate, fusoid, sometimes allantoid, non-septate, usually with two small polar guttules. Asexual morph: Undetermined.
Material examined – Italy, Arezzo Province [AR], near Poppi, on dead aerial stems of Lathyrus sp., 14 May 2014, Erio Camporesi, IT1873 (MFLU 16-0600)
GenBank accessions – LSU- MK592002, ITS- MK584982, SSU- MK585058, TEFMK714033
Notes – Our collection from Italy grouped with Duebenia compta from Luxembourg. The ITS data of our collection is similar to D. compta (G.M. 2015-06-01-1) (298/350-85% with 6 gaps) and the LSU region is similar to that of Duebenia compta (G.M. 2015-06-01-1) (809/905-89% with 10 gaps). Duebenia subcompta is characterized by erumpent, orange to brownish apothecia with thick and granulate-walled excipular cells, filiform paraphyses with slightly swollen apices, and aseptate, hyaline ascospores. Duebenia subcompta is similar to D. compta. However, D. compta has 1-septate ascospores and apically curved paraphyses (Hein 1976)
Morphology of Duebenia subcompta (MFLU 16-0600 holotype) a Substrate, b Apothecia on wood, c Apothecium on wood, d Cross section of an apothecium, e Close up of a vertical section of the apothecium at margin, f Septate paraphyses, g–j Short pedicellate asci with croziers at the base, k–n Fusoid ascospores. Scale bars: a = 1000 µm, b, c = 500 µm, d = 80 µm, e = 200 µm, f–j = 20 µm, k-n = 5 µm
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