taxonID	type	description	language	source
3406879A2110C6208C53FDEB24DB7B92.taxon	description	urn: lsid: ipni. org: names: 77260762 - 1 Figs 3 A, E, 4, 5 A – B	en	Xu, Ke-Wang, Lin, Chen-Xue, Guo, Jian-Qiang, Zhou, Xin-Xin, Liao, Wen-Bo, Mao, Ling-Feng (2022): Asplenium danxiaense sp. nov. (Aspleniaceae, Aspleniineae), a new tetraploid fern species from Guangdong, China, based on morphological and molecular data. European Journal of Taxonomy 798: 162-173, DOI: 10.5852/ejt.2022.798.1679, URL: http://dx.doi.org/10.5852/ejt.2022.798.1679
3406879A2110C6208C53FDEB24DB7B92.taxon	diagnosis	Diagnosis Asplenium danxiaense K. W. Xu sp. nov. somewhat resembles A. coenobiale and A. pulcherrimum by its dark brown to black rhizome scale with fimbriate to subentire margin, shiny dark brown to black, rigid and threadlike stipe and rachis, finely dissected frond, and lophate (cristate-alate) perispore, but the former has rhizome scales narrowly triangular to lanceolate, with a short apical tail, basal-most basiscopic secondary pinnae usually largest, fertile segment scarce, and exospore length usually more than 50 μm. In contrast, A. coenobiale and A. pulcherrimum have scales narrowly triangular to linearsubulate, with a long apical tail, basal acroscopic pinnule usually largest, fertile segment abundant, and exospore length usually less than 50 μm.	en	Xu, Ke-Wang, Lin, Chen-Xue, Guo, Jian-Qiang, Zhou, Xin-Xin, Liao, Wen-Bo, Mao, Ling-Feng (2022): Asplenium danxiaense sp. nov. (Aspleniaceae, Aspleniineae), a new tetraploid fern species from Guangdong, China, based on morphological and molecular data. European Journal of Taxonomy 798: 162-173, DOI: 10.5852/ejt.2022.798.1679, URL: http://dx.doi.org/10.5852/ejt.2022.798.1679
3406879A2110C6208C53FDEB24DB7B92.taxon	etymology	Etymology Based on the mountain name, Danxia, in northern Guangdong, China, and the Latin suffix, - ense, of origin, referring to the type locality of the species.	en	Xu, Ke-Wang, Lin, Chen-Xue, Guo, Jian-Qiang, Zhou, Xin-Xin, Liao, Wen-Bo, Mao, Ling-Feng (2022): Asplenium danxiaense sp. nov. (Aspleniaceae, Aspleniineae), a new tetraploid fern species from Guangdong, China, based on morphological and molecular data. European Journal of Taxonomy 798: 162-173, DOI: 10.5852/ejt.2022.798.1679, URL: http://dx.doi.org/10.5852/ejt.2022.798.1679
3406879A2110C6208C53FDEB24DB7B92.taxon	materials_examined	Type material Type CHINA • Guangdong province, Shaoguan City, Renhua County, Danxia mountain; 25 ° 01 ′ 41.076 ″ N, 113 ° 41 ′ 44.982 ″ E; elev. 150 m; in evergreen broad-leaved forest in a cave of Danxia landform; 12 May 2021; Jian-Qiang Guo & Xin-Xin Zhou XKW 674; holotype: NF!; isotype: SYS!.	en	Xu, Ke-Wang, Lin, Chen-Xue, Guo, Jian-Qiang, Zhou, Xin-Xin, Liao, Wen-Bo, Mao, Ling-Feng (2022): Asplenium danxiaense sp. nov. (Aspleniaceae, Aspleniineae), a new tetraploid fern species from Guangdong, China, based on morphological and molecular data. European Journal of Taxonomy 798: 162-173, DOI: 10.5852/ejt.2022.798.1679, URL: http://dx.doi.org/10.5852/ejt.2022.798.1679
3406879A2110C6208C53FDEB24DB7B92.taxon	description	Description Plants up to 30 cm tall. Rhizome erect, apex scaly; scales dark brown to black, narrowly triangular to lanceolate, (2.5 –) 4 – 5 × 0.4 – 0.9 cm, clathrate, margin fimbriate to subentire, apex shortly hairpointed. Fronds caespitose; stipe shiny, purplish black, 10 – 16 (– 20) cm, terete, rigid and threadlike, subglabrous; rachis shiny purplish black, becoming green in upper half toward apex, sulcate adaxially, subglabrous; lamina firmly herbaceous, green, subglabrous, triangular to ovate-triangular, 8 – 12 × 4 – 7 cm, base truncate, (2 or) 3 - pinnate, apex acuminate; primary pinnae in (6 –) 8 – 14 pairs, subopposite to alternate, overlapping, stalk short, purplish black to green abaxially, basal pinnae largest, ovatelanceolate, 3 – 6 × 1.5 – 2 cm, base obliquely truncate to truncate, apex subacute; secondary pinnae in 3 – 7 pairs, anadromous, basal basiscopic secondary pinnae usually largest, triangular-ovate, 0.7 – 1.5 × 0.5 – 0.8 cm, stalk short to subsessile, base asymmetrical, acroscopic side truncate, basiscopic side cuneate, apex obtuse; ultimate segments 2 – 4 pairs, ovate-oblong to linear, apex with 2 – 4 short and broadly triangular, obtuse to submucronate or sharp teeth. Costa and costules sulcate adaxially, green, veins slightly raised or flat adaxially, anadromous, 1 vein per segment, not reaching margin. Sori 1 per fertile, forked and pouch-shaped segment, medial to subterminal on acroscopic veinlet, oval to linear, 1 – 3 mm long; indusium grayish green, oval to linear, membranous, margin nearly entire, persistent, opening toward costules, persistent. Spores brown to dark brown, exospore 52 – 60 μm long, lophate (cristate-alate) perispore.	en	Xu, Ke-Wang, Lin, Chen-Xue, Guo, Jian-Qiang, Zhou, Xin-Xin, Liao, Wen-Bo, Mao, Ling-Feng (2022): Asplenium danxiaense sp. nov. (Aspleniaceae, Aspleniineae), a new tetraploid fern species from Guangdong, China, based on morphological and molecular data. European Journal of Taxonomy 798: 162-173, DOI: 10.5852/ejt.2022.798.1679, URL: http://dx.doi.org/10.5852/ejt.2022.798.1679
3406879A2110C6208C53FDEB24DB7B92.taxon	materials_examined	Additional material CHINA • Guangdong province, Shaoguan City, Renhua County, Danxia mountain; 25 ° 01 ′ 41.076 ″ N, 113 ° 41 ′ 44.982 ″ E; elev. 150 m; in evergreen broad-leaved forest in a cave of Danxia landform; 12 May 2021; Jian-Qiang Guo & Xin-Xin Zhou XKW 675; NF!.	en	Xu, Ke-Wang, Lin, Chen-Xue, Guo, Jian-Qiang, Zhou, Xin-Xin, Liao, Wen-Bo, Mao, Ling-Feng (2022): Asplenium danxiaense sp. nov. (Aspleniaceae, Aspleniineae), a new tetraploid fern species from Guangdong, China, based on morphological and molecular data. European Journal of Taxonomy 798: 162-173, DOI: 10.5852/ejt.2022.798.1679, URL: http://dx.doi.org/10.5852/ejt.2022.798.1679
3406879A2110C6208C53FDEB24DB7B92.taxon	distribution	Distribution and habitat Asplenium danxiaense sp. nov. is only known from Guangdong, China, growing in a cave of Danxia mountain in evergreen broad-leaved forest, at the elevation of 100 – 300 m.	en	Xu, Ke-Wang, Lin, Chen-Xue, Guo, Jian-Qiang, Zhou, Xin-Xin, Liao, Wen-Bo, Mao, Ling-Feng (2022): Asplenium danxiaense sp. nov. (Aspleniaceae, Aspleniineae), a new tetraploid fern species from Guangdong, China, based on morphological and molecular data. European Journal of Taxonomy 798: 162-173, DOI: 10.5852/ejt.2022.798.1679, URL: http://dx.doi.org/10.5852/ejt.2022.798.1679
3406879A2110C6208C53FDEB24DB7B92.taxon	vernacular_names	Vernacular name We propose a Chinese name, Dānxiáshān tiějiǎojué (丹DZƜŨffldz) to reflect the type locality of the new species.	en	Xu, Ke-Wang, Lin, Chen-Xue, Guo, Jian-Qiang, Zhou, Xin-Xin, Liao, Wen-Bo, Mao, Ling-Feng (2022): Asplenium danxiaense sp. nov. (Aspleniaceae, Aspleniineae), a new tetraploid fern species from Guangdong, China, based on morphological and molecular data. European Journal of Taxonomy 798: 162-173, DOI: 10.5852/ejt.2022.798.1679, URL: http://dx.doi.org/10.5852/ejt.2022.798.1679
3406879A2110C6208C53FDEB24DB7B92.taxon	conservation	Conservation Status We provisionally assess Asplenium danxiaense sp. nov. as Critically Endangered based on criterion D of IUCN (2012). Only one population and fewer than 50 individuals of A. danxiaense sp. nov. are known from Danxia mountain. It was not seen by one of us during separate expeditions to nearby sites on Danxia mountain.	en	Xu, Ke-Wang, Lin, Chen-Xue, Guo, Jian-Qiang, Zhou, Xin-Xin, Liao, Wen-Bo, Mao, Ling-Feng (2022): Asplenium danxiaense sp. nov. (Aspleniaceae, Aspleniineae), a new tetraploid fern species from Guangdong, China, based on morphological and molecular data. European Journal of Taxonomy 798: 162-173, DOI: 10.5852/ejt.2022.798.1679, URL: http://dx.doi.org/10.5852/ejt.2022.798.1679
