Two novel Acervus species extend their distribution within Yunnan, China Author Ekanayaka, Anusha H. Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand. & Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, China & World Agro forestry Centre East and Central Asia Office, 132 Lanhei Road, Kunming 650201, China Author Zhao, Qi Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, China & Institute of Biotechnology and Germplasm Resources, Yunnan Academy of Agricultural Sciences, Yunnan, Kunming 650223, People’s Republic of China Author Jones, E. B. Gareth Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, 50200, Thailand Author Pu, En-Da Institute of Biotechnology and Germplasm Resources, Yunnan Academy of Agricultural Sciences, Yunnan, Kunming 650223, People’s Republic of China Author Hyde, Kevin D. Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand. text Phytotaxa 2016 2016-11-02 283 1 74 82 http://dx.doi.org/10.11646/phytotaxa.283.1.5 journal article 10.11646/phytotaxa.283.1.5 1179-3163 13645382 Acervus stipitatus Ekanayaka, Q. Zhao & K.D. Hyde , sp. nov. Fig. 3 Index Fungorum number : IF552370 Facesoffungi number : FoF 02525 Etymology:—The specific epithet stipitatus refers to the apothecial type . Holotype :— CHINA , Yunnan Province , Xishuangbanna , buffer zone of the Nabanhe National Nature Reserve ( NNNR ), N22 ◦ 04ʹ –22 ◦ 17ʹ; E100 ◦ 32ʹ –100 ◦ 44ʹ, 30 August 2015 , S.C Karunarathna ( MFLU 16–0607 ). Diagnosis:—Apothecia stipitate, discoid, deep yellow. Receptacle concave. Hymenium hyaline to yellowish. Paraphyses subcylindrical. Asci unitunicate inoperculate with 8 ellipsoid ascospores. Description:— Saprobic on dead stems. Sexual morph: Apothecia 3–8 × 3–5 mm ( x =5.2 × 3.8 μm , n=10) arising singly, stipitate, discoid, deep yellow (4A8) when fresh. Receptacle concave, disc and margins are yellow to orange when fresh. Hymenium hyaline to yellowish. Ectal excipulum 90–120 μm ( x =106.2 μm , n=10) composed of large, thin-walled, hyaline cells of textura globulosa to angularis and medullary excipulum 130–180 μm ( x =168.6 μm , n=10) composed of hyaline cells of textura intricata mixed with textura angularis . Paraphyses 3–5 μm ( x =3.6 μm , n=20) wide at the middle, hyaline, aseptate, subcylindrical. Asci 120–15 × 7–10 μm ( x =140.2 × 9.1 μm, n=30) (length and the width at the middle) unitunicate, inoperculate, cylindrical, long pedicellate, non-amyloid. Ascospore 9–11 × 6–8 μm ( x =10.2 × 6.7 μm , n=40), uniseriate, ellipsoid, uniguttulate, hyaline, aseptate, smooth, thin-walled. Asexual morph: Undetermined. Habitat and Distribution:—solitary on soil with decaying litter under trees, Yunnan Province , China . Material examined:— CHINA , Yunnan Province , Xishuangbanna , buffer zone of the Nabanhe National Nature Reserve ( NNNR ), N22 ◦ 04ʹ –22 ◦ 17ʹ ; E100 ◦ 32ʹ –100 ◦ 44ʹ, 30 August 2015 , S.C Karunarathna ( MFLU 16–0607 , holotype ) . Notes:— Acervus stipitatus is distinguished by stipitate, discoid orange yellow apothecia with ellipsoid, uniguttulate ascospores. Acervus stipitatus is morphologically similar to A. xishuangbannicus ( Zhuang & Wang 1998 ) , but they differ in ascomatal colour and spore shape, size and number of guttules present. The spores of A. stipitatus are ellipsoid, uniguttulate and smaller (9–11 × 6–8 μm) and spores of A. xishuangbannicus are broadly ellipsoid, biguttulate and larger (12.5–13.5 × 9–10 μm) ( Table 2 ).