FIGURES 1–67 in Planothidum audax sp. nov. (Bacillariophyta, Achnanthidiaceae), a new diatom from temporary streams in southern Portugal

FIGURES 1–67. LM images of Planothidium spp. from two temporary streams in southern Portugal. 1–26. P. audax sp. nov. from type material BR-4663, Limas Stream, Portugal, pool collected on 20th September 2017 (Figures 1–9 RV, 10–18 SV, 19–26 paired valves of 4 individuals are shown, 21–22 correspond to the holotype). 27–28. RV and SV of two different specimens from Limas Stream, Portugal, dry biofilm collected on 19th February 2018. 29–34. Specimens from Limas Stream, Portugal, pool collected on 6th June 2018 (Figures 29–30 RV, 31–34 SV). 35–40. Valves from Limas Stream, Portugal, pool collected on 27th July 2018 (Figures 35–36 RV, 37–40 SV). 41–46. Population found in Maria Delgada Stream, Portugal, pool collected on 19th September 2017 (paired valves of three different specimens are presented). 47. Single RV valve found in Maria Delgada Stream. Portugal, pool collected on 28th May 2018 and representing the smallest valve found for the new species. 48–67. Other Planothidium species found in type material BR-4663, Limas Stream, Portugal (48–53 P. minutissimum, 54–57 paired valves of two specimens of P. rostratoholarcticum, 58–63 P. victorii, including paired valves of two complete frustules, 64–66 P. engelbrechtii, first two paired valves correspond to the same frustule, and 67 P. lanceolatum, single RV). Scale bar: 10 µm.