Frustulia hengduanensis sp. nov. a new diatom (Bacillariophyceae) from Hengduan Mountains, China Author Luo, Fen 0000-0003-3690-2834 College of Chemistry Biology and Environment, Yuxi Normal University, Yuxi, China & 15102162115 @ 163. com; https: // orcid. org / 0000 - 0003 - 3690 - 2834 Author You, Qingmin 0000-0002-5538-8503 College of Life Sciences, Shanghai Normal University, Shanghai, China & youqm 1117 @ shnu. edu. cn; https: // orcid. org / 0000 - 0002 - 5538 - 8503 youqm1117@shnu.edu.cn Author Yu, Pan 0000-0001-7937-2381 College of Life Sciences, Shanghai Normal University, Shanghai, China & 1574595358 @ qq. com; https: // orcid. org / 0000 - 0001 - 7937 - 2381 1574595358@qq.com Author Wang, Quanxi 0000-0002-0317-6613 College of Life Sciences, Shanghai Normal University, Shanghai, China & wangqx @ shnu. edu. cn; https: // orcid. org / 0000 - 0002 - 0317 - 6613 wangqx@shnu.edu.cn text Phytotaxa 2022 2022-08-23 559 2 193 199 journal article 132959 10.11646/phytotaxa.559.2.8 5281c87b-f973-49f8-824d-5576b12e134b 1179-3163 7021627

TABLE 2. Comparison of Frustulia species with a hyaline central area.

Species	Valve	Apices	Central area	Length	Breadth	Striae (in 10 μm)	Distributed	References
Frustulia hengduanensis sp. nov.	Elliptical- lanceolate to rhomboid	Narrowly rounded	Dumbbellshaped	43–55	11–14	36–40	China	This work
F. crassinervia (Brébisson & Smith) Lange- Bertalot & Krammer	Elliptical- lanceolate to rhomboid	Narrowly rounded	No central area	44-51	11.5–12.5	32–34	Europe, Asia, Africa, North America, South America and Oceania	Lange-Bertalot & Kramme 1996, Casa et al. 2018
F. pseudoundosa Flower	Linear- lanceolate	Rostrate to sub-capitate	Oblong	37–45	10–12	38	Falkland	Flower 2005
F. paulii Kilroy & Urbánková	Lanceolate	Rostrate	Irregular	47.5–77	9.3–11.6	29–34	New Zealand	Urbánková et al. 2014