Figure 3 from: Bukhtiyarova LN (2019) The genus Eunotia Ehrenb. (Bacillariophyta) in the Cheremsky Nature Reserve, Ukrainian Polissya, and refined terminology relevant to the raphe system morphology. PhytoKeys 128: 1-31. https://doi.org/10.3897/phytokeys.128.35566

Figure 3 - Scheme of the mirror-symmetric, mantle-offset, brevisslit raphe system in frustule of the genus Eunotia Ehrenb. A valve view, different parts of valve. TA – transapical axis. Central part – between the arrows, middle part – between upper and double arrows, the beginning of valve pole – double arrow B girdle view, arrow – central raphe pore C, D raphe system without terminal fissures C arrow – a pore outer at distal end of slit, that finishes at the middle of valve pole D arrow – a funnel-like outer at distal end of slit, that finishes at the venral corner of valve pole E, F raphe system with terminal fissures – dotted lines between arrows, arrow – distal end of a slit E double arrow – the end of terminal fissure F double arrow – lacuna at the end of terminal fissure. (Original by L. Bukhtiyarova)