Cantharellus macrocarpus (Cantharellaceae, Cantharellales), a new species from tropical China Author Zhang, Yu-Zhuo 0000-0001-6831-1647 Key Laboratory of Tropical Translational Medicine of Ministry of Education, Transgenic Laboratory, School of Pharmacy, & 952280975 @ qq. com; https: // orcid. org / 0000 - 0001 - 6831 - 1647 952280975@qq.com Author Liang, Zhi-Qun 0000-0003-4437-8585 College of Science, Hainan University, Haikou 570228, China & lizhqu 1980 @ 126. com; https: // orcid. org / 0000 - 0003 - 4437 - 8585 Author Xie, Hui-Jing 0000-0001-9440-7765 Key Laboratory of Tropical Translational Medicine of Ministry of Education, Transgenic Laboratory, School of Pharmacy, & 965227423 @ qq. com; https: // orcid. org / 0000 - 0001 - 9440 - 7765 965227423@qq.com Author Wu, Lu-Ling 0000-0002-1761-7408 Key Laboratory of Tropical Translational Medicine of Ministry of Education, Transgenic Laboratory, School of Pharmacy, & 844478801 @ qq. com; https: // orcid. org / 0000 - 0002 - 1761 - 7408 844478801@qq.com Author Xue, Rou 0000-0002-9779-0920 Key Laboratory of Tropical Translational Medicine of Ministry of Education, Transgenic Laboratory, School of Pharmacy, & 1581957646 @ qq. com; https: // orcid. org / 0000 - 0002 - 9779 - 0920 1581957646@qq.com Author Zeng, Nian-Kai 0000-0001-7651-452 Key Laboratory of Tropical Translational Medicine of Ministry of Education, Transgenic Laboratory, School of Pharmacy, & niankaiz @ gmail. com; https: // orcid. org / 0000 - 0001 - 7651 - 452 niankaiz@gmail.com text Phytotaxa 2021 2021-02-17 484 2 170 180 http://dx.doi.org/10.11646/phytotaxa.484.2.2 journal article 10.11646/phytotaxa.484.2.2 1179-3163 Cantharellus macrocarpus N.K. Zeng, Y.Z. Zhang & Zhi Q. Liang , sp. nov. ( Figs. 2–3 ) MycoBank: MB837434 Etymology:—Latin “ macrocarpus ” refers to the large basidioma. Diagnosis:—Characterized by large basidioma with a bright yellow-orange pileus, a well-developed, rugulose hymenophore, cream to pale yellowish stipe, noticeably thickened hyphal walls in the pileipellis, presence of clamp connections in all parts of the basidiomata, and distribution in tropical Asia. Holotype :— CHINA . Hainan Province : Changjiang County , Bawangling National Nature Reserve , elev. 650 m , 23 May 2019 , N . K . Zeng 4050 ( FHMU3304 ). GenBank accession number: 28 S = MT 986061 , ITS = MT 990453 , TEF1 = MT 990634 . Description:— Pileus 10–16 cm diam, infundibuliform; margin slightly incurved, irregular, often wavy and lobed; surface dry, nearly glabrous, bright yellow-orange (2A7), darker brownish yellow (3A8) when old; context about 4 mm thick in the center of the pileus, white (1B1), unchanging in color when injured. Hymenophore composed of relatively well-developed, decurrent, branched to furcate gill folds, rugulose, becoming strongly intervenose with age, yellow-orange (2A7) to deep brownish yellow (3A7), unchanging in color when injured. Stipe 5.2–6.5 × 1.7–2.2 cm , central, subcylindric, solid; surface cream to pale yellowish (2A2–4); basal mycelium white (1A1). Taste and Odor not distinctive. Spore print not obtained. Basidiospores [340/17/5] 6.5–7.2–8 × 4–4.7–5(–5.5) μm, Q = (1.3–)1.4–1.75(–1.88), Qm = 1.54 ± 0.13, ellipsoid, smooth, thin to slightly thick-walled (up to 0.5 μm), hyaline in 5% KOH, containing lipid droplets. Basidia 53–76.5 × 7.5–9 μm, narrowly clavate, slender, thin to slightly thick-walled (up to 0.5 μm), (4–)5(–6)-spored, colorless to hyaline in 5% KOH; sterigmata 4–5 μm long. Subhymenium filamentose, composed of long, slender hyphae measuring 3–5 μm diam. Cystidia absent. Pileipellis a cutis 70–100 μm thick, composed of interwoven, filamentous hyphae, 4–9 μm diam, hyaline in 5% KOH, slightly thick-walled (0.5–1μm); terminal cells 53–112 × 5–9 μm, subcylindrical to subclavate with obtuse apex. Clamp connections present in all parts of basidiomata. Habitat:—Scattered to gregarious on the ground in a mixed forest of Pinus latteri Mason and Lithocarpus corneus (Lour.) Rehd. Known distribution:—Southern China ( Hainan Province ) and Laos . Additional specimens examined:— CHINA . Hainan Province : Changjiang County , Bawangling National Nature Reserve , elev. 650 m , 23 May 2019 , N . K . Zeng 4036 ( FHMU3303 ); same location, 31 August 2019 , N . K . Zeng4205 , 4207 , 4208 ( FHMU3356 , 3357 , 3358 ) .