Phillipsia hydei M. Zeng & Q. Zhao, 2019

Zeng, Ming, Ekanayaka, Anusha H. & Zhao, Qi, 2019, Phylogeny and morphology of Phillipsia hydei sp. nov. (Sarcoscyphaceae) from Thailand, Phytotaxa 395 (4), pp. 277-286 : 281

Phillipsia hydei M. Zeng & Q. Zhao , sp. nov. Figs. 2 , 3

Index Fungorum number: IF 555284; Facesoffungi number: FoF 04823.

Etymology: The epithet in honor of Kevin D. Hyde for his contributions to mycology.

Holotype: MFLU 18-0714 .

Saprobic on dead wood. Sexual morph: Ascomata 0.5−2 mm high, 5−12 mm broad, superficial, scattered, sessile. Receptacle discoid, concave, reddish to red, margin conspicuous when fresh, involute, hymenium reddish, receptacle surface yellowish to orange or reddish, wrinkled when dry. Medullary excipulum 90−150 μm broad, of textura intricata, hyaline, composed of 3−4 μm broad hyphae. Ectal excipulum 47−73 μm broad, of textura porrecta, hyaline, composed of 2−4 μm broad hyphae, J-. Paraphyses 2−3 μm broad at the middle, filiform, exceeding the asci sightly, reddish contents, septate, branched, J-. Asci 166−200 × 8.5−12 μm, 8-spored, operculate, subcylindrical, stipitate, J-. Ascospores [20/1/1, in H 2 O] (17.2–)18−20(–21) ×(9.6–)9.8−10.4(–10.6) (Q = 1.72−2.20, Q = 1.86±0.12), ellipsoid with rounded ends, uniseriate, inequilateral, inamyloid, uniguttulate or biguttulate, very faint striations, with gelatinous sheath in 5% KOH. Asexual morph: Unknown.

Material examined:— THAILAND, Ranong, on unidentified dead wood, 5 October 2017 ; M. Zeng , ST05 ( MFLU 18-0714 , holotype) ; ibid. ( HKAS 97492 , isotype) ; THAILAND, Ron Thong , Prachuap Khiri Khan, on unidentified dead wood, 28 August 2017 ; C.G. Lin , 1-2 ( MFLU 18-1329 , HKAS 97489 ) ; ibid. 1-3 ( MFLU 18-0712 , HKAS 97490 ) .

Note: This species is characterized by red, sessile apothecia, reddish paraphyses and ornamented ascospores with gelatinous sheath. Phylogenetic results show a close relationship between P. hydei and P. carnicolor . But there are three major morphological differences between these two species: 1). Colors of apothecia: P. hydei has red apothecia ( FIG. 2 ), but the apothecia of P. carnicolor shows distinct orange color ( FIG. 4 ). 2). Shape of apothecia: P. hydei has sessile discoid apothecia ( FIG. 2 , h) and P. carnicolor has short stalked ( FIG. 4 , c), cupulate to irregular apothecia. 3). Colors of paraphyses: within the genus Phillipsia , content of paraphyses is a very important feature to identify ( Hansen et al. 1999). We observed reddish paraphyses in P. hydei and yellowish paraphyses in P. carnicolor respectively.

Figures

FIGURE 2. Phillipsia hydei (MFLU 18-0714, holotype). a–d Fresh mature apothecia on substrate (a MFLU 18-1329. b–c MFLU 18- 0712. d MFLU 18-0714). e–h Dry apothecia under stereoscope. Scale bars: e, g–h = 1000 μm. f = 500 μm.

FIGURE 3. Phillipsia hydei (MFLU 18-0714, holotype). a Part of a vertical section of receptacle surface of pileus showing its cell type. b Asci and paraphyses. c–f Asci (f Asci in Congo red.). g–k Ascospores (h–i Ascospores in 5% KOH.). Scale bars: a = 30 μm. b–g = 50 μm. h–k = 15 μm.

FIGURE 4. Phillipsia carnicolor (MFLU 18-0713). a–c, g Fresh mature apothecia on substrate. d–e Dry apothecia under stereoscope. Scale bars: d–e = 2000 μm.