Cymbella xiaojinensis sp. nov., a new cymbelloid diatom species (Bacillariophyceae) from high altitude lakes, China Author Zhang, Yun 0000-0002-9455-4711 Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650500, P. R. China. & zhangyun @ ynu. edu. cn; https: // orcid. org / 0000 - 0002 - 9455 - 4711 zhangyun@ynu.edu.cn Author Liao, Mengna 0000-0002-1571-4116 College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, P. R. China. & liaomengna 03 @ 163. com; https: // orcid. org / 0000 - 0002 - 1571 - 4116 Author Li, Yan-Ling 0000-0002-3540-8706 Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650500, P. R. China. & yanlingli @ ynu. edu. cn; https: // orcid. org / 0000 - 0002 - 3540 - 8706 yanlingli@ynu.edu.cn Author Chang, Feng-Qin 0000-0002-8204-3877 Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650500, P. R. China. & changfq @ ynu. edu. cn; https: // orcid. org / 0000 - 0002 - 8204 - 3877 changfq@ynu.edu.cn Author Kociolek, John Patrick 0000-0001-9824-7164 Museum of Natural History and Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, Colorado- 80309, USA. & patrick. kociolek @ colorado. edu; https: // orcid. org / 0000 - 0001 - 9824 - 7164 patrick.kociolek@colorado.edu text Phytotaxa 2021 2021-01-27 482 1 55 64 http://dx.doi.org/10.11646/phytotaxa.482.1.6 journal article 305097 10.11646/phytotaxa.482.1.6 7c838b66-52cb-4f0b-abf8-7905a0ca208a 1179-3163 5418120

TABLE 3. Morphological characteristics of Cymbella xiaojinensis sp. nov. and Cymbella species sharing similar morphological features.

Species /Feature	Cymbella xiaojinensis	C. shudunensis Li et Metzeltin	C. terrafuegiana Krammer	C. pamirensis Zhang & Rioual	C. gravida Recasens & Maidana
Reference Valve length, µm Valve width, µm	this study 32-53 11.0-18.5	Hu et al. (2013) 55-87 24-27	Krammmer (2002) 64-74 18-22	Zhang et al. (2017) 21-40 7-11	Recasens & Maidana (2013) 25-57 12-17
Length/ width ratio Striae in 10 µm	Max 3.5 7-12	Max 3.3 7-12	Max 3.6 8-9	Max 4.3 9-14	Max 3.8 8-16
Central areas	Distinct, large, about 1/2 the breadth of the valve	Small and indistinct dorsal	Absent or rounded	Absent or indistinct	Small, rounded
Stigmata	1-2	2–4	2-4	2-4	1-4
Valve shape	Strongly dorsiventral, triangular	Strongly dorsiventral, triangular	Semi-rhomboid, straight or very slightly convex	Semi-rhomboid, slightly concave with slightly tumid center	Semi-rhomboid, strongly dorsiventral
Central pores of raphe	Bulbous, ventrally bent	Drop-like, slightly ventrally deflected	Small, sickle-shaped, dorsally bent	Distinct	Small, slightly ventrally deflected
End shape	Rounded	Broadly rounded	Acutely rounded	Broadly rounded to weakly protracted	btusely rounded or subrostrate