Testate Amoebae from South Vietnam Waterbodies with the Description of New Species Difflugia vietnamica sp. nov. Author Trana, Hoan Q. Author Mazei, Yuri A. text Acta Protozoologica 2018 57 4 215 229 http://dx.doi.org/10.4467/16890027ap.18.016.10092 journal article 299505 10.4467/16890027AP.18.016.10092 5a3f25e5-d1bb-4e06-9b85-f48247ac228c 1689-0027 12638334 Difflugia vietnamica sp. nov. LSID urn:lsid:zoobank.org:act: 40EE4F28-F925-4B44-9C70- DEB8F7D476A3 Description: Shell of medium size, ovoid to elongate-ovoid with pointed apex without horn ( Figs 6 , 7A, C , Supplementary Figure 3A ). The shell is symmetric with axis of symmetry is the line that passes through the top and perpendicular to the apertural plane. Shells are made of small sand grains ( Figs 7A–D , Supplementary Figure 3B, C ). The surface of the shell is relatively smooth, the area closer to the aperture is more rugged due to some particles with larger size. The aperture is circular (Supplementary Figure 3D ), the apertural width is approximately 1/2 of the total body length and nearly 2/3 of the body width. The shell has a circular cross-section ( Fig. 6 , Supplementary Figure 3D ).