FIGURES 42–46. Tursiocola varicopulifera. Type population, SEM. 42 in Three New Species of Tursiocola (Bacillariophyta) from the Skin of the West Indian Manatee (Trichechus manatus)

FIGURES 42–46. Tursiocola varicopulifera. Type population, SEM. 42. Internal view of whole valve showing pseudosepta and butterfly structure. 43. Detail of butterfly structure and internal oval central area with two knobs on the raphe rib. 44. Entire frustule in girdle view showing differentiated copulae and wide mantle areas. Long arrow indicates valvocopula; short arrow indicates abvalvar copula. 45. Valve and cingulum showing connections between valvocopula and valve margin. 46. Isolated valvocopula showing 3 tabs on advalvar side and 2 rows of elongated pores. Arrow indicates open end of valvocopula. Scale bars: 42, 44, 46 = 10 μm; 43 = 1 μm; 45 = 5 μm.