taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
0393CF4AD721FFFCFF22BB3FFE29FCB5.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/13708233/files/figure.png	https://doi.org/10.5281/zenodo.13708233	FIGURES 1–6. Arcuatasigma marginale Lobban, sp. nov. Figs 1, 2. Holotype in LM (differential interference contrast). Fig. 3. Twisted pole in SEM. The raphe on the valve face can be seen rolling around to the lower side, while the valve surface at the apex has rolled up from below. Fig. 4. Central portion of valve and valvocopula, oriented with poles curved to left (inset). Showing the non-overlapping raphe branches, areolae in the proximal rows joined apically (arrowheads) vs. those in the distal rows joined transapically (arrows). Also showing the longitudinal striae parallel to the sternum on the left, slightly angled on the right. Fig. 5. Detail of valve showing areola slit orientation trends in different rows (double-headed arrows) and joined areolae in the marginal rows (arrows). Fig. 6. Detail of frustule at apex. Scale bars: 10 μm (Figs 1–3), 2 μm Figs 4, 6), 1 μm (Fig. 5).	FIGURES 1–6. Arcuatasigma marginale Lobban, sp. nov. Figs 1, 2. Holotype in LM (differential interference contrast). Fig. 3. Twisted pole in SEM. The raphe on the valve face can be seen rolling around to the lower side, while the valve surface at the apex has rolled up from below. Fig. 4. Central portion of valve and valvocopula, oriented with poles curved to left (inset). Showing the non-overlapping raphe branches, areolae in the proximal rows joined apically (arrowheads) vs. those in the distal rows joined transapically (arrows). Also showing the longitudinal striae parallel to the sternum on the left, slightly angled on the right. Fig. 5. Detail of valve showing areola slit orientation trends in different rows (double-headed arrows) and joined areolae in the marginal rows (arrows). Fig. 6. Detail of frustule at apex. Scale bars: 10 μm (Figs 1–3), 2 μm Figs 4, 6), 1 μm (Fig. 5).	2018-04-04	Lobban, Christopher S.;Reid, Geraldine		Zenodo	biologists	Lobban, Christopher S.;Reid, Geraldine			
0393CF4AD723FFFCFF22BE25FC3AF8D1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/13708235/files/figure.png	https://doi.org/10.5281/zenodo.13708235	FIGURES 7–18. Arcuatasigma arenicolum Lobban, sp. nov. Figs 7–12 DIC, Figs 14–18 SEM. Figs 7, 8. Live cell in valve and girdle view, showing plastids. Fig. 9. Holotype. Fig. 10. Another cell; arrowhead indicates position of twist in the frustule. Fig. 11. Detail of central part of cell in valve view. Fig. 12. Detail of apex in girdle view. Fig. 13. Portion of frustule showing exterior and interior of valve and the non-rotated apex. Fig. 14. Detail of central area showing overlapping raphe pores. Fig. 15. Detail of valve surface showing smooth surface and V-shaped openings of paired areolae (arrows). Fig.16.Apex of frustule. Fig. 17. Detail of internal central area. Fig. 18. Internal aspect of apex showing helictoglossa. Scale bars: 10 μm (Figs 7–13), 2 μm (Figs 16–18), 500 nm (Figs 14, 15).	FIGURES 7–18. Arcuatasigma arenicolum Lobban, sp. nov. Figs 7–12 DIC, Figs 14–18 SEM. Figs 7, 8. Live cell in valve and girdle view, showing plastids. Fig. 9. Holotype. Fig. 10. Another cell; arrowhead indicates position of twist in the frustule. Fig. 11. Detail of central part of cell in valve view. Fig. 12. Detail of apex in girdle view. Fig. 13. Portion of frustule showing exterior and interior of valve and the non-rotated apex. Fig. 14. Detail of central area showing overlapping raphe pores. Fig. 15. Detail of valve surface showing smooth surface and V-shaped openings of paired areolae (arrows). Fig.16.Apex of frustule. Fig. 17. Detail of internal central area. Fig. 18. Internal aspect of apex showing helictoglossa. Scale bars: 10 μm (Figs 7–13), 2 μm (Figs 16–18), 500 nm (Figs 14, 15).	2018-04-04	Lobban, Christopher S.;Reid, Geraldine		Zenodo	biologists	Lobban, Christopher S.;Reid, Geraldine			
