Phillipsia gelatinosa Ekanayaka, Q. Zhao & K.D. Hyde, 2017

Ekanayaka, Anusha H., Bhat, D. J., Hyde, Kevin D., Jones, E. B. Gareth & Zhao, Qi, 2017, The genus Phillipsia from China and Thailand, Phytotaxa 316 (2), pp. 138-148 : 142

Phillipsia gelatinosa Ekanayaka, Q. Zhao & K.D. Hyde , sp. nov. Fig. 3

Index Fungorum number: IF552760 Facesoffungi number: FoF 02879

Etymology:—The species epithet ‘gelatinosa’ refers to the ascospores enclosed with gelatinous sheath.

Holotype:— Thailand, Chiang Mai Province, Mushroom Research Center , on rotten wood, December 12, 2015, S. C. Karunarathna HD044 ( MFLU15-2360 )

Diagnosis:—Apothecia disc-shaped, sub-stipitate, hymenium surface purple red. Asci suboperculate, nonamyloid, 8-spored. Ascospores ellipsoid, hyaline, with a gelatinous sheath.

Description:— Saprobic on dead stems. Sexual morph: Apothecia 1–8 cm diam., 2–10 mm high when fresh, scattered, sessile or sub-stipitate, disc-shaped, purple-red with yellow patches when fresh, reddish brown when dry, receptacle convex, lower side white to creamy when fresh, leathery. Ectal excipulum 40–120 μm composed of loosely arranged cells of textura intricata. Medullary excipulum 0.1–2 mm composed of thin-walled, tightly arranged cells of textura intricata. Subhymenium composed of gelatinized cells of textura intricate 4–5 μm thick. Paraphyses 2.5–5 μm (x = 3.4 μm, n = 20) wide, filiform, septate, sometimes with orange granules. Asci 340–570 × 20–27 μm (x = 487.5 × 22.9 μm, n = 20), long stipitate, cylindrical, suboperculate, 8-spored. Ascospores 27–36 × 14–17 μm (x = 32.5 × 15.9 μm, n = 35), uniseriate, ellipsoidal, with rounded or slightly apiculate apices, guttulate, hyaline, immature ascospores are smooth and with a thick gelatinous sheath, mature ascospores contains 4–6 longitudinal surface ridges and sometimes with thin gelatinous sheath. Asexual morph: Unknown.

Material examined:— Thailand, Chiang Mai Province, Mushroom Research Center, on rotten wood, December 12, 2015, S. C. Karunarathna HD044 (MFLU15-2360). Thailand, Chiang Mai Province, Mushroom Research Center, on rotten wood, June 12, 2016, A. H. Ekanayaka HD057 (MFLU 16-2956, Holotype), Thailand, Chiang Mai Province, on rotten wood, June 18, 2016, H. Maoqiang LE2016112 (MFLU 16-2992).

Notes:— Phillipsia gelatinosa is characterized by large purple-red apothecia with yellow patches and ascospores with a gelatinous sheath and longitudinal surface ridges. Phillipsia gelatinosa is similar to P. domingensis in having purplish apothecia but differ by pigmentation of paraphyses, larger-sized asci and ascospores, presence of gelatinous sheath in immature and sometimes in mature ascospores ( Hansen et al. 1999) ( Table 3).

Figures

FIGURE 3. Phillipsia gelatinosa (MFLU16-2956). a. Apothecia on nature substrate, b. Part of a vertical section of excipulum, c. Septate, branched paraphyses, d–e. Subcylindrical asci, f–g. Sub operculate apical apex, h–j. Immature ascospores with thick gelatinous sheath, k–m. Mature ascospores with thin gelatinous sheath, n–p. Mature ascospores without gelatinous sheath. Scale bars b–e=100 μm, f,g=50 μm, h–p=20 μm.