Figs 37–43 in Revision of the non-marine centric diatom flora (Bacillariophyta) of the sub-Antarctic Campbell Island (southern Pacific Ocean) with the descriptions of five new species

Figs 37–43. Angusticopula cosmica Goeyers & Van de Vijver sp. nov. SEM. Campbell Island holotype population, sample BAS303 (BR-4577). 37. Frustule showing both the valve face and girdle formed by open, narrow copulae. The arrows indicate the ligulae. 38. Detail of the mantle valve with the serrated mantle edge (double arrow) and the ligulate copulae (single arrow). 39. Valve in girdle view showing the striated mantle, the narrow ridge bordering the mantle/valve face junction (black arrows) and the typical groove bordering the mantle edge (double white arrow). 40. External view of a valve face showing the dense pattern of granules. 41. External detail of the very fine striae, the small, rounded areolae and the narrow ridge bordering the valve margin. 42. Internal view of an entire valve showing the rimoportulae and the thick mantle. 43. Internal detail of the valve with some rimoportulae. Scale bars: 37–39, 42 = 10 μm; 40 = 5 μm; 41, 43 = 1 μm.