FIGURE 3 in Conicocassis, a new genus of Arcellinina (testate lobose amoebae)

FIGURE 3. Specimens of Centropyxis aculeata (Ehrenberg, 1832), the type species of genus Centropyxis. 1, redrafted sketches of C. aculeata from Leidy (1879, plate 31) (modified after Medioli and Scott, 1983, figure 11) showing some of the typical morphotypes within the species. 2 and 3, scanning electron microscope of specimens from the lakes in the Yellowknife region, NT, Canada; ventral-apertural view showing the most common test morphology with semi-circular aperture and long spines extending from the fundus and very fine grained agglutination on ventral surface (2) and dorsal view showing xenogenous agglutination comprised both of diatom frustules and mineral grains (3).