Chamaepinnularia taihangensis sp. nov. (Bacillariophyceae), a new diatom species from Taihang Valley, Shanxi province, China Author Cui, Nini 0000-0001-9573-9219 School of Life Science, Shanxi University, Taiyuan 030006, China & 940328194 @ qq. com; https: // orcid. org / 0000 - 0001 - 9573 - 9219 940328194@qq.com Author Liu, Qi 0000-0002-8710-4560 School of Life Science, Shanxi University, Taiyuan 030006, China & liuqi 317 @ 126. com; https: // orcid. org / 0000 - 0002 - 8710 - 4560 Author Liu, Xudong 0000-0003-1679-5584 School of Life Science, Shanxi University, Taiyuan 030006, China & liuxudong @ sxu. edu. cn; https: // orcid. org / 0000 - 0003 - 1679 - 5584 liuxudong@sxu.edu.cn Author Nan, Fangru 0000-0002-4490-4912 School of Life Science, Shanxi University, Taiyuan 030006, China & nanfr @ sxu. edu. cn; https: // orcid. org / 0000 - 0002 - 4490 - 4912 nanfr@sxu.edu.cn Author Kociolek, John Patrick 0000-0001-9824-7164 Museum of Natural History and Department of Ecology and Evolutionary Biology, University of Colorado, UCB 218, Boulder, Colorado 80309 USA & patrick. kociolek @ colorado. edu; https: // orcid. org / 0000 - 0001 - 9824 - 7164 patrick.kociolek@colorado.edu Author Xie, Shulian School of Life Science, Shanxi University, Taiyuan 030006, China text Phytotaxa 2023 2023-03-14 587 2 184 192 http://dx.doi.org/10.11646/phytotaxa.587.2.7 journal article 234665 10.11646/phytotaxa.587.2.7 3848f1ba-0944-41ea-a9db-fa81f3802c98 1179-3163 7731953

TABLE 1. Comparison of Chamaepinnularia taihangensis sp. nov. with similar species in the genus.

Character	C. hassiaca	C. justa	C. krookiformis	C. soehrensis	C. taihangensis sp. nov.
Valve outline	linear	linear-elliptical	elliptic-lanceolate	linear	linear-lanceolate
Valve margins	central expansion	slightly convex	–	triundulate	triple curvatures
Apices shape	subcapitate to capitate	obtusely rounded	capitate	capitate	capitate
Valve length, μm	8.8 – 10.8	14 – 18	14 – 40	10 – 12	10 – 14
Valve width, μm	2.5 – 2.7	5 – 6	5 – 11	2	3.0 – 3.5
Striae in 10 μm	20 – 25	24 – 26	17 – 21	18 – 20	20 – 21
Striae arrangement	slightly radiate in the central area and convergent toward the ends	In the middle radiate towards apices becoming parallel	slightly radiate in the central area and convergent toward the ends	slightly radiate to parallel	slightly radiate in the central area and convergent toward the ends
Central area	indistinct	Rhombic-almost circular	narrow, rhombic	narrow linear	narrow, rhombic
Axial area	narrow, linear	narrow	rhombic	oval to rectangular	rhombic
Raphe	filiform	Straight	Straight, filiform	Straight, filiform	Straight, filiform