| Parent | Category | Figures | |
|---|---|---|---|
| 1 | Obba | moricandi | 178 |
| 2 | Obba | rota | 150 |
| 3 | Obba | parmula | 149 |
| 4 | Obba | listeri | 148 |
| 5 | Obba | horizontalis | 120 |
| 6 | Obba | brunnescens | 113 |
| 7 | Obba | marginata | 93 |
| 8 | Obba | mesai | 85 |
| 9 | Obba | planulata | 76 |
| 10 | Obba | ilogana | 54 |
| 11 | Obba | papilla | 43 |
| 12 | Obba | reeveana | 37 |
| 13 | Obba | scrobiculata | 35 |
| 14 | Obba | basidentata | 35 |
| 15 | Obba | livesayi | 28 |
| 16 | Obba | columbaria | 15 |
| 17 | Obba | bigonia | 8 |
| 18 | Obba | species | 3 |
| 19 | Obba | marmorata | 2 |