Difflugia azerbaijanica Snegovaya and Alekperov, 2005
Diagnosis: Test asymmetrical, with a well-defined bifurcation from equatorial part into two halves, one of them ending with two spines and the second part, which is wider, with one spine. Spines always 3 in number, two of them located closely to each other, and the third one, slightly apart. The shell is covered with sand particles of variable shape and size; smaller particles are near the aperture. The cytoplasm is transparent. There are 1-3 wide lobopodia and several contractile vacuoles.
Dimensions: Test length with spines 160-180 µm; width 120-140 µm; pseudostome 80-90 µm; spines 20-25 µm.
Ecology: Freshwater. In a small marginal lake of the Kurakchay river basin on aquatic plants, Azerbaijan.
Remarks: According to Snegovaya and Alekperov, 2005, “…this species is closely related to D. foissneri Chardez 1987 found in freshwater basins in Belgium (Chardez, 1987). Our species differs from it in smaller shell size, asymmetric location of larger spines and a well-defined bifurcation of the aboral shell part. In our opinion, Centropyxis marsupiformis described by Brazilian specialists (Velho and Lansac-Toha, 1996) from the high Parana river could be D. foissneri or D. azerbaijanica.”
Unfortunately, the authors did not give the shell shape laterally, so correct identification cannot be done. One of the specimens described from Brazil is clearly not C. marsupiformis.
Reference: Snegovaya, N. and Alekperov, I. (2005) Fauna of testate amoebae of western Azerbaijan Rivers. Protistology 4 (2), 149-183.