FIGURES 35–40. Epithemia agharkarii sp. nov., SEM from the type material (AHMA #1405), external and internal views. 35, 36. Dorsal frustule showing a regularly sculptured outer surface (Fig. 35, arrows) of the valve with C-type foramina, single row of poroids on the valvocopula and cingulum elements (Fig. 35, asterisks). 37. Ventral view of valve internal with primary (arrows) and secondary fibular costae (arrows), alveolus. 38. Internal view showing the siliceous extensions of the ribs indicated by asterisks. 39. Magnified view of primary fibular costae inside with secondary fibular costae, alveolus (asterisks), C-shaped foramina (arrows), silica processes, and irregularly shaped portula with internal raphe (arrowheads) inside the canal. 40. Broken valve showing the raphe canal (arrows), portula (arrowheads) and stright distal raphe ending. Scale bar = 10 μm (Fig. 35), 2 μm (Fig. 36), 4 μm (Figs 37, 38, 40), 1 μm (Fig. 39).

Published as part of Vigneshwaran, Anbukkarasu, Liu, Yan, Kociolek, John Patrick & Karthick, Balasubramanian, 2021, A new species of Epithemia Kützing (Bacillariophyceae, Rhopalodiales) from the Mula river, Western Ghats, India, with comments on the phylogenetic position of Rhopalodia and Epithemia, pp. 171-181 in Phytotaxa 489 (2) on page 176, DOI: 10.11646/phytotaxa.489.2.5, http://zenodo.org/record/5755488