taxonID	type	description	language	source
48CB6B8DB0575D41813D25C10FF686C3.taxon	description	Figs 1, 2, 3, 4, 5	en	Yu, Pan, You, Qingmin, Bi, Yonghong, Wang, Quanxi (2022): A new freshwater species Achnanthidium kangdingnese (Bacillariophyta, Achnanthidiaceae) from Sichuan Province, China. PhytoKeys 204: 97-108, DOI: http://dx.doi.org/10.3897/phytokeys.204.89690, URL: http://dx.doi.org/10.3897/phytokeys.204.89690
48CB6B8DB0575D41813D25C10FF686C3.taxon	description	Description. LM observations (Fig. 1 A - AD), valves are linear in shape, with rounded apices. Some individuals were slightly constricted in the middle. Valve length 10.8 - 23.5 µm, breadth 3.8 - 4.0 µm (n = 200). On both valves striae are radiate throughout, and striae count cannot be performed with LM. Raphe valve is concave, with a narrow, linear axial area slightly expanded near the center. The central area is well defined with one or two spaced striae. Rapheless valve is convex, with a narrow linear axial area weakly expanded at the middle portion of the valve. The central area is a small oval or absent. SEM observations (Figs 2 - 5), both valves have a narrow hyaline area at the valve face-mantle junction (Figs 2 A, B, 4 A, B). Raphe valve: Externally, the raphe is filiform and straight (Fig. 2 A, B), distal raphe ends are deflected in opposite directions (Fig. 2 A-D), and proximal raphe ends are straight and teardrop-shaped (Fig. 2 A, B, E). The number of striae is 34 - 36 in 10 µm at the middle portion, and 33 - 38 in 10 µm near the apices (Figs 2 A, B; 3 A). Areolae are round or oval. The uniseriate striae are composed of 4 - 7 areolae in the middle portion of the valve (Fig. 2 A, B, E), and 1 - 7 areolae at the apex (Fig. 2 A-D). Valve mantle with a single row of linear areolae extend around the apices with a small interruption at the ends (Fig. 2 A, C-E). Internally, the thickening widens at the end (Fig. 3 A, C), and the raphe terminates in raised helictoglossae close to the apices (Fig. 3 A-C). Proximal raphe ends are distinctly deflected in opposite directions (Fig. 3 B, E). Areolae are transapically elongated in throughout valve (Fig. 3 C, E). Areolae are occluded by hymene perforated by delicate slits, and each hymen is closely joined with the adjacent hymen (Fig. 3 D). Rapheless valve: the single row of pores on the mantle is continuous (Figs 4 A-C, 5 A, C). Externally, the axial area is linear and weakly expanded in the central area (Fig. 4 A, B). On some valves, there are two slit-like areolae oriented longitudinally in the middle region of the axial area (Fig. 4 B). Striae are uniseriate, comprised of 3 - 6 round or transapically oriented areolae in the central area (Fig. 4 A, B, D), and 1 - 5 round or oblong areolae at the apices (Fig. 4 A-C). A row of slit-like areolae is present on the mantle (Fig. 4 A, B). Internally, the axial area is slightly raised (Fig. 5 A). Areolae are transapically oval in the valve (Fig. 5 B, C). The number of striae is 34 - 38 in 10 µm in the center, and 38 - 40 in 10 µm near the apices (Figs 4 A, B; 5 A). Areolae are occluded by hymens perforated by delicate slits, and each hymen is closely joined with an adjacent hymen (Fig. 5 B, C).	en	Yu, Pan, You, Qingmin, Bi, Yonghong, Wang, Quanxi (2022): A new freshwater species Achnanthidium kangdingnese (Bacillariophyta, Achnanthidiaceae) from Sichuan Province, China. PhytoKeys 204: 97-108, DOI: http://dx.doi.org/10.3897/phytokeys.204.89690, URL: http://dx.doi.org/10.3897/phytokeys.204.89690
48CB6B8DB0575D41813D25C10FF686C3.taxon	etymology	Etymology. The species so named refers to Kangding County where the holotype was collected.	en	Yu, Pan, You, Qingmin, Bi, Yonghong, Wang, Quanxi (2022): A new freshwater species Achnanthidium kangdingnese (Bacillariophyta, Achnanthidiaceae) from Sichuan Province, China. PhytoKeys 204: 97-108, DOI: http://dx.doi.org/10.3897/phytokeys.204.89690, URL: http://dx.doi.org/10.3897/phytokeys.204.89690
48CB6B8DB0575D41813D25C10FF686C3.taxon	distribution	Distribution. The new species is known only from the type locality.	en	Yu, Pan, You, Qingmin, Bi, Yonghong, Wang, Quanxi (2022): A new freshwater species Achnanthidium kangdingnese (Bacillariophyta, Achnanthidiaceae) from Sichuan Province, China. PhytoKeys 204: 97-108, DOI: http://dx.doi.org/10.3897/phytokeys.204.89690, URL: http://dx.doi.org/10.3897/phytokeys.204.89690
