Difflugia vietnamica, Trana & Mazei, 2018

Trana, Hoan Q. & Mazei, Yuri A., 2018, Testate Amoebae from South Vietnam Waterbodies with the Description of New Species Difflugia vietnamica sp. nov., Acta Protozoologica 57 (4), pp. 215-229 : 217

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 ).

Figures

Fig. 6. Outline of Difflugia vietnamica sp. nov. Letters – measured characters (see Table 1).

Fig. 7A–D. Scanning electron micrographs of Difflugia vietnamica sp. nov. (A, B) View of shape (A) and view with emphasis on the apertural edge (B) of the first specimen. (C, D) View of shape (C) and view with emphasis on the apertural edge (D) of second specimen.

Fig. 3. Boxplot of sample species richness by main types of studied waterbodies.