. Bulletin of the British Museum (Natural History) Zoology. TWELVE SOIL TESTATE AMOEBAE FROM AUSTRALIA, AFRICA, AND AUSTRIA. Figs 17-23 Difflugia stoutii, light microscopic (Figs 17-19) and SEM-aspects (Figs 21-23) and ideal individual (Fig. 20). 17-20 Broad lateral, narrow lateral and ventral views. 21 Ventral view, x 1200. 22,23 Broad and narrow lateral view, x 1600, x 1200. Arrow marks aperture. Scale bar divisions 10 um. Table 5. Morphometric characterization of Difflugia stoutii. All measurements in um. Table 6. Morphometric characterization of Heleopera sylvatica. All measurements in um.
. Bulletin of the British Museum (Natural History) Zoology. TWELVE SOIL TESTATE AMOEBAE FROM AUSTRALIA, AFRICA, AND AUSTRIA. Figs 17-23 Difflugia stoutii, light microscopic (Figs 17-19) and SEM-aspects (Figs 21-23) and ideal individual (Fig. 20). 17-20 Broad lateral, narrow lateral and ventral views. 21 Ventral view, x 1200. 22,23 Broad and narrow lateral view, x 1600, x 1200. Arrow marks aperture. Scale bar divisions 10 um. Table 5. Morphometric characterization of Difflugia stoutii. All measurements in um. Table 6. Morphometric characterization of Heleopera sylvatica. All measurements in um. Character X M SD SE cv Min Max n Character X M SD SE CV Min Max n 0) 38 61 27 (2) 22 40 24 (1) 59 70 23 (3) 16 25 15 (2) 39 48 23 (4) 6 10 16 (3) 25 33 23 (5) 5 6 7 (4) 2 5 23 Bonnet & Thomas (1960/?) described a variety, cyclostoma, lacking the rim of rough particles around the aperture. We suggest that such elements are easily lost, since transitions in the formation or reduction of the apertural rim are common (see above and Couteaux, 1976, Fig. U; Ogden & Hedley, 1980, PI. 24; Rauenbusch, 1987 PI. 16, Fig. a). At the present state of knowledge it seems wise to classify our population as C. kahli. For detailed ecological data see Bonnet (1989a). Difflugia stoutii Ogden, 1983 Figs 17-23, Tables 1,5 BM (NH) Reg. No. 1990. Shell brownish, elongate ellipsoid, slightly flattened, com- posed of overlapping, flat xenosomes, very fragile, thus shells often collapse when air-dried (Fig. 21). Aperture elliptic. Shell measurements, especially characters (2) and (4), show considerable variability (Table 5). Ogden (1983), who. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appea
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