taxonID	type	description	language	source
459382DCD60A5C43955460E07D5A482F.taxon	description	LM: Figs 1 – 7, SEM: Figs 8 – 13, 14 – 18	en	Jiang, Yu-Fei, Blanco, Saúl, Zhang, Wei (2025): Navicula congqiancuoensis sp. nov. — a new diatom species (Bacillariophyceae) from Sichuan Province, China. PhytoKeys 257: 209-217, DOI: 10.3897/phytokeys.257.152987
459382DCD60A5C43955460E07D5A482F.taxon	description	Description. Light microscopy (LM) (Figs 1 – 7). The valve is linear to linear-lanceolate, with a slight widening in the center and broadly rounded at the apices, with a length of 42.7 – 51.2 μm and a width of 4.9 – 6.1 μm, giving an average L / W ratio 8.2 (40 valves were measured to obtain these size ranges). The raphe is weakly lateral, and the external distal raphe ends are deflected on to the mantle. The striae are radiate and convergent at the ends, and there are two to three short striae in the central area, 14 – 16 in 10 μm. The axial area is narrow and linear, and the central area is small and elliptical in the central nodule. Scanning electron microscopy (SEM) (Figs 8 – 18). External view: Valves flat. Raphe fissure straight (Figs 8, 9). Proximal raphe endings slightly unilaterally hooked towards secondary valve side. External distal raphe endings curved to the secondary side of valve, with ends positioned on valve mantle (Figs 10, 12). Axial area very narrow and often thickened. Lineolae density ca. 50 in 10 µm (Fig. 11). Transversal striae radial, convergent at the ends. The lineolae and the virgae separating them are aligned longitudinally so that there appear to be both longitudinal and transverse striae (Figs 8 – 13). Internal view: the raphe is straight and slightly inclined towards the secondary valve side (Fig. 14). On the side of the raphe sternum opposite to central nodule, there is a longitudinal, semilanceolate thickening. Distal raphe endings are well-developed helictoglossae (Figs 15, 16). The accessory rib is well-developed on the primary valve side and unilaterally widened in the center, forming an asymmetrical central nodule that is visible under light microscopy (Figs 17, 18). The Voigt discordance is not visible in the valves we observed.	en	Jiang, Yu-Fei, Blanco, Saúl, Zhang, Wei (2025): Navicula congqiancuoensis sp. nov. — a new diatom species (Bacillariophyceae) from Sichuan Province, China. PhytoKeys 257: 209-217, DOI: 10.3897/phytokeys.257.152987
459382DCD60A5C43955460E07D5A482F.taxon	etymology	Etymology. The specific epithet, congqiancuoensis, refers to the locality from which the new species was described.	en	Jiang, Yu-Fei, Blanco, Saúl, Zhang, Wei (2025): Navicula congqiancuoensis sp. nov. — a new diatom species (Bacillariophyceae) from Sichuan Province, China. PhytoKeys 257: 209-217, DOI: 10.3897/phytokeys.257.152987
