Lamtopyxis cassagnaui Bonnet, 1974
Diagnosis: Shell hemispherical. Aperture triangular, at the end of an invaginated tubular pseudostome (propylostome). Ventral opening of the pseudostome with three large rounded theeth. Shell composed of mineral plates mixed with organic material.
Dimensions: Diameter on average 116.6 µm; height 2/3 of shell diameter; length of pseudostomal tube 1/3 of shell diameter; pseudostome 1/4 of shell diameter.
Ecology: Forest soil, Nepal, Paraguay.