Fig 1.
Cocconeis neothumensis var. marina, SEM.
(a) External SV view showing shallow depression; (b) External SV view showing longitudinal ribs in the central valve zone (arrowhead); (c) External SV view of apex with transapical striae; (d) Internal SV view showing longitudinal ribs (arrowhead); (e) Broken cingulum (arrowhead); (f) Focus on SV areolae; (g) Panoramic on valves: SV (arrowhead) and RVS (arrow); (h) Broken frustule showing the different areolae between RSV (rounded areolae; arrow) and SV (rectangular areolae; arrowhead). Scale bars: 1 μm.
Fig 2.
Cocconeis neothumensis var. marina, SEM.
(a) External RSV view showing the straight branches of the raphe. (b) Internal RSV view showing the central nodule. (c) Internal RSV view showing raphe with small helictoglossae (arrowhead). Scale bars: 1 μm.
Fig 3.
Maximum likelihood phylogenetic tree based on sequences of the 18S rRNA gene.
The analysis includes Cocconeis sp. (HG993259), Cocconeis coreana (LR890011), Cocconeis euglypta (KM592933), Cocconeis cf. molesta (AJ535148), Cocconeis pediculus (FR873235.1), Cocconeis placentula (FR873239), Cocconeis sijunghoensis (KM592930), Cocconeis stauroneiformis (AB430614) and Cocconeis neothumensis var. marina identified in the present study (highlighted with the red box) (Clustal W, https://www.genome.jp/tools-bin/clustalw; PhyML; bootstrap only values above 50% are shown).
Fig 4.
Maximum likelihood phylogenetic tree based on sequences of the rbcL gene.
The analysis includes Cocconeis sp. (LR890022), Cocconeis coreana (LR890017), Cocconeis cf. cupulifera (KT943680), Cocconeis euglypta (KT072907), Cocconeis lineata (LR890020), Cocconeis mascarenica (MK454988), Cocconeis pediculus (KM084991), Cocconeis placentula (MW484810), Cocconeis cf. sigillata (MT015687), Cocconeis sijunghoensis (LR890019.1), Cocconeis stauroneiformis (AB430694) and Cocconeis neothumensis var. marina identified in the present study (highlighted with the red box). (Clustal W, https://www.genome.jp/tools-bin/clustalw; PhyML; bootstrap only values above 50% are shown).