Fottea 2025, 25(1):81-90 | DOI: 10.5507/fot.2024.012

New and interesting species of the genus Gomphosinica Kociolek, You et Wang (Bacillariophyta) from Xizang Autonomous Region, China

Hanxun Jv1, 6, Yutong Jiang1, Xinyuan Na1, John P. Kociolek2, Huan Zhu3, Guoxiang Liu3, Maxim Kulikovskiy4, Yanling Li5, Yawen Fan1, *, Yan Liu1, *
1 College of Life Science and Technology, Harbin Normal University, 150025 Harbin, China, *Corresponding authors e-mails: yawenfan@163.com; yanliuhrb@hotmail.com
2 Museum of Natural History and Department of Ecology and Evolutionary Biology, University of Colorado, 80309 Boulder, CO, USA
3 Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, 430072 Wuhan, China
4 K.A. Timiryazev Institute of Plant Physiology RAS, IPP RAS, 35 Botanicheskaya St., 127276, Moscow, Russia
5 Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environment Science, Yunnan University, 650500 Kunming, China
6 Instrumental analysis center of Northeast Agricultural University, 150038 Harbin, China

During the investigation of freshwater biodiversity of Xizang Autonomous Region, diatom samples were collected from several habitats and two new species were discovered and are formally described herein, namely, Gomphosinica stoermeri Liu, Kociolek et Li sp. nov., and Gomphosinica qii Liu, Kociolek et Li sp. nov. Both of these new species have biseriate striae, straight raphe ends, pseudosepta at both ends and a hooded stigma covering in the central area. Gomphosinica stoermeri can be separated from other similar species by its clavate outline, bluntly rounded headpole, rounded footpole, small and rounded central area formed by 2-4 short striae. Gomphosinica qii is relatively small, has small and more elliptical valves, small bluntly headpole and narrow footpole, round to rhombic central area formed by 2-6 short striae. Specimens which appear very similar to Gomphosinica hedinii were observed, but the outline and shape of central area do not match the original of Gomphosinica hedinii; herein we document these specimens and designate them as "Gomphosinica cf. hedinii". Gomphosinica linearis was also observed, and we provide a more detailed description of it based on LM and SEM. Differences between the two newly described species and other known species of the genus are also discussed.

Keywords: gomphonemoid diatoms, Gomphosinica, new species, Xizang

Received: May 9, 2024; Revised: October 22, 2024; Accepted: November 12, 2024; Prepublished online: January 24, 2025; Published: April 1, 2025  Show citation

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Jv, H., Jiang, Y., Na, X., Kociolek, J.P., Zhu, H., Liu, G., ... Liu, Y. (2025). New and interesting species of the genus Gomphosinica Kociolek, You et Wang (Bacillariophyta) from Xizang Autonomous Region, China. Fottea, 25(1), 81-90. doi: 10.5507/fot.2024.012
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