1 Pellicle finely striated, with 50-68 pellicular striae between aboral trochal band and peristomial lip, and 32-53 between aboral trochal band and scopula.

2 Number of transverse lines from oral area to aboral trochal band 70-87, from aboral trochal band to scopula, 30-38.

3 Pellicle finely striated with ca 35-45 striations from scopula to aboral trochal band and ca 85-110 from aboral trochal band to oral area.

4 Pellicle clearly striated, with ca 40-50 striations from scopula to aboral trochal band and ca 75-95 from aboral trochal band to oral area.

5 Single contractile vacuole situated near ventral wall of infundibulum. 28-33 pellicular striations from peristome to aboral trochal band and 5-8 from aboral trochal band to scopula.

6 Pellicle distinctly striated, with 20-27 striations from scopula to aboral trochal band and 50-60 striations from aboral trochal band to oral area.