Genus  Pontigulasia Rhumbler, 1896

Diagnosis: Shell pyriform, sometimes with a constriction of the neck, either circular or compressed in transverse section; composed mainly of agglutinate mineral particles with some diatom frustules or siliceous plates, bound by a network of organic cement; aperture terminal, circular; internally the shell is divided into two regions by a narrow bridge, made mainly of organic cement with some agglutinate particles, stretched between the lateral walls at about one third of the body length from the aperture.

Known species:
P. rhumbleri Hopkinson, 1919 (type species)
P. compressoidea Jung, 1942
P. elisa (Penard, 1893)
P. sarrazinensis Chardez and Gaspar, 1984
P. spiralis Rhumbler, 1896.
P. pentangulostoma Quin et al., 2008

Remarks: Usually, the internal bridge is hard to detect due to the opaqueness of the shell. It is sometimes visible as a dark band at about one third of the shell length from the aperture. For the function of this bridge, see rotifers.