| Parent | Category | Figures | |
|---|---|---|---|
| 1 | Nucula | crystallina | 87 |
| 2 | Nucula | nitidosa | 54 |
| 3 | Nucula | nucleus | 53 |
| 4 | Nucula | paulula | 46 |
| 5 | Nucula | sulcata | 40 |
| 6 | Nucula | hartvigiana | 29 |
| 7 | Nucula | nitida | 25 |
| 8 | Nucula | izushotoensis | 22 |
| 9 | Nucula | tokyoensis | 22 |
| 10 | Nucula | semiornata | 12 |
| 11 | Nucula | species | 10 |
| 12 | Nucula | turgida | 10 |
| 13 | Nucula | trigonica | 8 |
| 14 | Nucula | convexa | 8 |
| 15 | Nucula | dorsocrenata | 5 |
| 16 | Nucula | aegeensis | 5 |
| 17 | Nucula | proxima | 4 |
| 18 | Nucula | declivis | 4 |
| 19 | Nucula | sultana | 3 |
| 20 | Nucula | puelcha | 3 |
| 21 | Nucula | hanleyi | 2 |
| 22 | Nucula | pusilla | 2 |
| 23 | Nucula | colombiana | 2 |
| 24 | Nucula | exigua | 1 |
| 25 | Nucula | tumidula | 1 |
| 26 | Nucula | irregularis | 1 |
| 27 | Nucula | donaciformis | 1 |
| 28 | Nucula | savatieri | 1 |
| 29 | Nucula | bicornis | 1 |
| 30 | Nucula | antipodum | 1 |
| 31 | Nucula | torresi | 1 |
| 32 | Nucula | pisum | 1 |
| 33 | Nucula | falklandica | 1 |
| 34 | Nucula | cymella | 1 |