FIGURES 38–41. Tursiocola varicopulifera. Type population, SEM. 38 in Three New Species of Tursiocola (Bacillariophyta) from the Skin of the West Indian Manatee (Trichechus manatus)

FIGURES 38–41. Tursiocola varicopulifera. Type population, SEM. 38. External view of whole valve showing axial and central areas. 39. Detail of external central area showing diamond-shaped central area, stauros and straight expanded proximal raphe ends. 40. Detail of external valve apex showing apparently bifurcated distal raphe ends. 41. Detail of external valve apex in mantle view showing transapically elongated areolae and spur-like extension of valve margin at apex. Scale bars. 38 = 10 μm; 39–41 = 1 μm.