Proliferodiscus chiangraiensis
Proliferodiscus chiangraiensis Ekanayaka & K.D. Hyde
Index Fungorum number: IF556293; Facesoffungi number: FoF 05912
Etymology – refers to the Province where the holotype was collected
Holotype – MFLU 16-0588
Saprobic on dead stems. Sexual morph: Apothecia 710–780 × 320–350 µm (x = 744.3 × 327.6 µm, n = 10). arising in small groups, sessile, white when fresh. Receptacle pulvinate, disc convex, orange when fresh. Hairs 35.5–40.1 × 3–3.6 µm (x = 38.2 × 3.2 µm, n = 30), cylindric, septate, hyaline, eguttulate, walls usually thin, surface finely granulate. Ectal excipulum 10–15 µm (x = 12.6 µm, n = 10) in upper flanks, composed of thin-walled, hyaline to yellowish cells of textura prismatica. Medullary excipulum 18–25 µm (x = 21.7 µm, n = 10) in upper flanks, composed of thin-walled, yellowish cells of textura prismatica. Hymenium yellow. Paraphyses 1.2–1.5 µm wide ( x = 1.33 µm, n = 20), numerous, filiform, obtuse at the apex, aseptate, not exceeding the asci in length, smooth, guttulate. Asci 27.5–32.3 × 3.1–5.8 µm (x = 30.3 × 5.3 µm, n = 30), 8-spored, unitunicate, cylindric-clavate, rounded or medium conical at the apex, amyloid, stipitate base, arising from croziers. Ascospores 3.9–5.7 × 1.3–1.8 µm ( x = 4.7 × 1.5 µm, n = 40), 1–2-seriate, ellipsoid to fusoid, aseptate, hyaline. Asexual morph: Undetermined.
Material examined – Thailand, Chiang Rai Province, Doi Mae Salong, on dead stems, 22 June 2015, A.H. Ekanayaka, HD027 (MFLU 16-0588).
GenBank accessions – LSU- MK591985, ITS- MK584956, SSU- MK585037
Notes – Our new collection HD027 from Thailand grouped with Proliferodiscus earoleucus (BHI_F624d) and P. inspersus (KUS_F52660) and the clade with three Proliferodiscus spp. received high statistical support of 100% (Fig. 35). The ITS data of our collection is similar to that of P. earoleucus (BHI-F624d) (532/542-98 % with 2 gaps) and to P. inspersus (KUS-F52660) (535/549-97% with 4 gaps). The LSU data is similar to P. inspersus (KUS-F52660) (810/812-99% with 2 gaps) and to P. tricolor (CBS 128288) (850/872-97% with 5 gaps). Proliferodiscus chiangraiensis is characterized by sessile apothecia with orange disk and margins covered by white granulate hairs, filiform, aseptate paraphyses, cylindric-clavate, amyloid asci and ellipsoid to fusoid ascospores. Proliferodiscus chiangraiensis is similar to P. earoleucus and P. inspersus. However, P. earoleucus differs from P. chiangraiensis by having non-amyloid asci and stipitate apothecia (Han et al. 2014). Proliferodiscus inspersus differs from P. chiangraiensis by having stipitate apothecia, paraphyses with slightly swollen apices and larger asci (Haines & Dumont 1983, Han et al. 2014).
Morphology of Proliferodiscus chiangraiensis (MFLU 16-0588 holotype) a Substrate. b Apothecia on wood. c Apothecium on wood. d Cross section of an apothecium. e Close up of the cross section of apothecium at margins. f, g Long cylindrical hairs (in congo red reagent). h Cylindrical paraphyses (in congo red reagent). i–l Cylindric-clavate asci (in congo red reagent). m Apex of the asci with the plug blueing in Melzer’s reagent. n–r Fusoid ascospores (in congo red reagent). Scale bars: b = 1000 µm, c = 200 µm, d = 300 µm, e = 100 µm, f = 20 µm, g–l = 15 µm, m = 10 µm, n–r = 5 µm.
Recent Genus
RutstroemiaXeropilidium
Ionomidotis
Recent Species
Encoelia furfuraceaRutstroemia tiliacea
Xeropilidium dennisii