A New Species of Kumanoa (Batrachospermales, Rhodophyta) from Baiyun Mountain, Guangdong, China Author Fang, Kun-Peng 0000-0003-0108-0244 School of Life Science, Shanxi Key Laboratory for Research and Development of Regional Plants, Shanxi University, Taiyuan 030006, China & 1349303542 @ qq. com; https: // orcid. org / 0000 - 0003 - 0108 - 0244 1349303542@qq.com Author Nan, Fang-Ru 0000-0002-4490-4912 School of Life Science, Shanxi Key Laboratory for Research and Development of Regional Plants, Shanxi University, Taiyuan 030006, China & nanfr @ sxu. edu. cn; https: // orcid. org / 0000 - 0002 - 4490 - 4912 nanfr@sxu.edu.cn Author Feng, Jia 0000-0003-2132-2503 School of Life Science, Shanxi Key Laboratory for Research and Development of Regional Plants, Shanxi University, Taiyuan 030006, China & fengj @ sxu. edu. cn; https: // orcid. org / 0000 - 0003 - 2132 - 2503 fengj@sxu.edu.cn Author Lv, Jun-Ping 0000-0003-1320-7070 School of Life Science, Shanxi Key Laboratory for Research and Development of Regional Plants, Shanxi University, Taiyuan 030006, China & lvjunping 024 @ sxu. edu. cn; https: // orcid. org / 0000 - 0003 - 1320 - 7070 lvjunping024@sxu.edu.cn Author Liu, Qi 0000-0002-8710-4560 School of Life Science, Shanxi Key Laboratory for Research and Development of Regional Plants, Shanxi University, Taiyuan 030006, China & liuqi @ sxu. edu. cn; https: // orcid. org / 0000 - 0002 - 8710 - 4560 liuqi@sxu.edu.cn Author Liu, Xu-Dong 0000-0003-1679-5584 School of Life Science, Shanxi Key Laboratory for Research and Development of Regional Plants, Shanxi University, Taiyuan 030006, China & liuxudong @ sxu. edu. cn; https: // orcid. org / 0000 - 0003 - 1679 - 5584 liuxudong@sxu.edu.cn Author Xie, Shu-Lian 0000-0003-2349-2071 School of Life Science, Shanxi Key Laboratory for Research and Development of Regional Plants, Shanxi University, Taiyuan 030006, China & xiesl @ sxu. edu. cn; https: // orcid. org / 0000 - 0003 - 2349 - 2071 xiesl@sxu.edu.cn text Phytotaxa 2021 2021-10-15 523 1 89 98 journal article 4009 10.11646/phytotaxa.523.1.5 2a023a27-c26d-456f-a5af-5448615e02b7 1179-3163 5572016 Kumanoa baiyunensis K.-P.Fang, F.-R.Nan & S.-L.Xie sp. nov. ( Figs. 3A–L ) Description :—Plants monoecious, moderately mucilaginous, dark green, small, only 0.5–1 cm high. Thallus branching irregular, frequent in the upper part of the thallus. Whorls well developed, confluent, barrel-shaped, 350–450 µm wide. Internodes 150–350 µm; axis colorless, axial cells 20–50 µm in diameter; cortical filaments profuse, cylindrical, 5–10 um in diameter, 20 µm or more long. Primary fascicles straight, dichotomously branched, 2-3 times branched, composed of 5–7 cells, ellipsoidal, 5–8 µm in diameter, 20–40 µm long. Secondary fascicles, abundant, covering the entire internode, unbranched or dichotomously branched, shorter or as long as the primary fascicles, composed of 3–7 cells. Spermatangia spherical, sparse, single-grown, terminal on primary fascicles, 7–9 µm in diameter. Carpogonial branches helically twisted, arising from the pericentral cells; involucral filaments short, dense, composed of 1–3 cells; carpogonia with club-shaped trichogynes, distinctly stalked, 30–50 µm long, 6–10 µm in diameter. Carposporophytes sessile, one per whorl, lower or as high as whorl radius, dense and spherical, 150–250 µm in diameter. Carposporangia obovoid or elliptical, 7–10 µm in diameter, 15–20 µm long, terminal on gonimoblast filaments. Diagnosis: ―The new species differs from other Kumanoa species in the following combination of characters: small plant size with abundant branching in upper part of thallus; carposporophytes spherical and one per whorl; club-shaped trichogynes with distinct stalk; spermatangia sparse and single-grown, terminal on primary fascicles. Diagnostic DNA sequence: rbc L, COI-5P and LSU (accession number: MW798266 for rbc L, MW798267 for COI-5P and MW794124 for UPA). Type locality : China , Guangdong , Baiyun Mountain ( 24° 15′ 5″ N , 113° 18′ 2″ E ). On the wall of a stony pool formed by groundwater from dry mountain stream of the Baiyun Mountain . Holotype designated here : Liquid immersion specimens (SXU-GD20001) and herbarium voucher ( Holotype SXU-GD20002, Isotype SXU-GD20003) were deposited in Herbarium of Shanxi University ( SXU ), Shanxi University , Taiyuan , Shanxi Province , China . November 2020 by Kun-peng Fang. Etymology : The species epithet refers to the type locality (Baiyun mountain, China ).