Table 1. Morphometric data of Sinistrostrombidium cupiformum gen. nov., sp. nov. (first row) and Antestrombidium agathae gen. nov., sp. nov. (second row).
| Characters | Min | Max | Mean | SD | n |
|---|---|---|---|---|---|
| Length of cell (μm) | 27 | 34 | 30.3 | 2.20 | 20 |
| 41 | 51 | 45.1 | 3.36 | 11 | |
| Width of cell (μm) | 20 | 28 | 24.4 | 1.98 | 20 |
| 21 | 29 | 24.1 | 2.74 | 11 | |
| Distance from anterior end to cytostome (μm) | 12 | 14 | 13.3 | 0.80 | 20 |
| 15 | 21 | 17.3 | 2.06 | 10 | |
| Length of ventral kinety (μm) | 8 | 12 | 10.5 | 1.51 | 13 |
| 6 | 11 | 9.14 | 1.77 | 7 | |
| Number of anterior membranelles | 11 | 13 | 11.9 | 0.49 | 20 |
| 15 | 21 | 18.1 | 1.87 | 11 | |
| Number of ventral membranelles | 7 | 8 | 7.6 | 0.51 | 20 |
| 7 | 9 | 7.8 | 0.72 | 12 | |
| Number of dikinetids in girdle kinety | 24 | 31 | 27.2 | 1.96 | 13 |
| 37 | 52 | 43.3 | 3.86 | 10 | |
| Number of dikinetids in circular kinety | — | — | — | — | — |
| 25 | 34 | 28.5 | 2.58 | 11 | |
| Number of dikinetids in ventral kinety | 9 | 14 | 11.8 | 1.54 | 13 |
| 10 | 16 | 11.9 | 1.76 | 9 | |
| Diameter of macronucleus (μm) | 14 | 17 | 15.6 | 0.94 | 17 |
| — | — | — | — | — | |
| Length of macronucleus (μm) | — | — | — | — | — |
| 13 | 17 | 15.1 | 1.45 | 11 | |
| Width of macronucleus (μm) | — | — | — | — | — |
| 8 | 12 | 9.7 | 1.27 | 11 |
All data based on specimens stained with protargol; Max-maximum value observed; Mean-arithmetic mean; Min-minimum value observed; n-sample size; SD-standard deviation.—: data unavailable.