Surirella dongtingensis sp. nov. and ultrastructure of S. undulata (Bacillariophyta) from China

Authors

Liu B., Kociolek J.P., Ector L.

Reference

Botany Letters, vol. 168, n° 1, pp. 32-41, 2021

Description

The morphological diversity in the genus Surirella is summarized, a new Surirella species is described, and the valve ultrastructure of S. undulata is documented under the scanning electron microscope. The new species, Surirella dongtingensis sp. nov., has a moderately twisted frustule with open valvocopula. Under the light microscope the frustule has one valve that is twisted at one apex, and the second valve is rotated 180 degrees compared to the first, such that one with the left side of one apex is not in the same focal plane with the three other sides, and the second is that the right side of one apex is not in the same focal plane with the three other sides. With respect to the valvocopula, the pars exterior bears oblique striae and scattered warts, and the pars interior have parallel striae and fimbriate ad-valve margins. Internally, both pars exterior and interior are smooth. Two nomenclatural changes for Cymatopleura aquastudia Kociolek & Q.You and C. xinjiangiana Q.You & Kociolek are provided to account for species to align with current concepts of the genus Surirella.

Link

doi:10.1080/23818107.2020.1756908