FIGURES 1–30. Navicula subphyllepta Contamine, Beauger & Van de Vijver sp. nov. (Figs 1–22, 28–30) and N. phyllepta Kützing (Figs 23–27). LM images taken from the holotype population (BR-4914, Marais Poitevin, 23DIAT_plank, Figs 1–22) and original Kützing slide BM 18874 (Calvados, France, Figs 23–27). 1–22. LM view of the holotype population of N. subphyllepta arranged in decreasing length. 23–27. LM views of 5 valves of N. phyllepta arranged in decreasing length. 28. SEM external view of an entire valve of N. subphyllepta. The arrow indicates the Voigt discordance. 29. SEM internal view of an entire valve of N. subphyllepta. 30. SEM internal detail of the central area of N. subphyllepta. Scale bar = 10 μm except for Fig. 30 where scale bar = 1 µm.

Published as part of Contamine, Léa, Beauger, Aude, Voldoire, Olivier, Ragot, Angèle & Vijver, Bart Van De, 2025, Navicula subphyllepta sp. nov. (Naviculaceae, Bacillariophyceae), a new brackish diatom species from France, pp. 294-300 in Phytotaxa 731 (3) on page 296, DOI: 10.11646/phytotaxa.731.3.8, http://zenodo.org/record/18423039