Plagiostriata pingtanensis W.Y.Zhang, Z.Wang, Y.H.Gao & C.P.Chen, 2022

Zhang, Weiyu, Wang, Zhen, Zhuo, Suqing, Gao, Yahui, Li, Xuesong, Liang, Junrong & Chen, Changping, 2022, Two new species of Plagiostriata (Bacillariophyaceae) from sand sediments of southern China, Phytotaxa 556 (1), pp. 87-93 : 90-92

publication ID	https://doi.org/ 10.11646/phytotaxa.556.1.7
DOI	https://doi.org/10.5281/zenodo.6952128
persistent identifier	https://treatment.plazi.org/id/A85D87BF-F75F-FFF0-4A88-D396FB5DFDCE
treatment provided by	Plazi
scientific name	Plagiostriata pingtanensis W.Y.Zhang, Z.Wang, Y.H.Gao & C.P.Chen
status	sp. nov.

Treatment

Plagiostriata pingtanensis W.Y.Zhang, Z.Wang, Y.H.Gao & C.P.Chen sp. nov. (LM Figs 13–16 View FIGURES 13–16 , SEM Figs 17–23 View FIGURES 17–23 )

Description:—LM: Cells solitary. Frustules rectangular in girdle view. Valves linear elliptical to elliptical with round apices. Valve dimensions: length 4.6~6.0 μm, breadth 1.6~1.8 μm. The sternum and striae are invisible.

SEM: Valve surface flat. The valve margin is simple and smooth. The ventral mantle is deep and the dorsal mantle is wide ( Figs 17, 19, 22 View FIGURES 17–23 ). Sternum narrow, not obvious, extending to the apical pore area at both poles ( Fig. 17 View FIGURES 17–23 ). Striae uniseriate, symmetrically distributed on two sides of the sternum, 44~ 46 in 10 μm ( Figs 17, 21 View FIGURES 17–23 ). Areolae small, subcircular, occluded by external volae. Apical pore fields simple, composed of two pores. The pores in apical pore fields narrow and more like the fissure ( Fig. 23 View FIGURES 17–23 ). The external slit-like aperture of the rimoportula is located in the striae near sternum at the valve centre, and the internal opening with slight siliceous thickening is simple and situated close to the sternum ( Figs 18, 19, 21 View FIGURES 17–23 ). The girdle is composed of three simple bands with a typical staurosirid girdle construction. The plain bands open, curved and thin at the cell apices. The valvocopula is broader than the segmented copulae ( Fig. 22 View FIGURES 17–23 ).

Type:— CHINa,= Fujian Province, Pingtan County: Longfengtou Beach, sand sample from intertidal, low tide area, 25°30 ‘19 “N, 119°48’ 57” E, May 2018, Z. Wang, School of Life Sciences , Xiamen University (holotype slide N202102! = Fig. 2 View FIGURES 1–4 ; isotype slide NI 202102, both at School of Life Sciences , Xiamen University, Xiamen, GoogleMaps People’s Republic of China).

Etymology:—The epithet “ pingtanensis ” derives from the site where the specimen was found.