| Parent | Category | Figures | |
|---|---|---|---|
| 1 | Hydroginella | guttula | 9 |
| 2 | Hydroginella | osteri | 8 |
| 3 | Hydroginella | agulhasensis | 6 |
| 4 | Hydroginella | galatea | 4 |
| 5 | Hydroginella | tridentata | 4 |
| 6 | Hydroginella | columnaria | 3 |
| 7 | Hydroginella | sagamiensis | 2 |
| 8 | Hydroginella | richeri | 1 |
| 9 | Hydroginella | rugosa | 1 |
| 10 | Hydroginella | vitiensis | 1 |
| 11 | Hydroginella | wareni | 1 |
| 12 | Hydroginella | roselinae | 1 |
| 13 | Hydroginella | species | 1 |
| 14 | Hydroginella | unica | 1 |
| 15 | Hydroginella | marina | 1 |
| 16 | Hydroginella | caledonica | 1 |
| 17 | Hydroginella | angustata | 1 |
| 18 | Hydroginella | bullata | 1 |
| 19 | Hydroginella | gemella | 1 |
| 20 | Hydroginella | vincentiana | 1 |
| 21 | Hydroginella | musorstomi | 1 |