| Ancestor domains | Extant domains | ||||
---|---|---|---|---|---|---|
 | Gains | Losses | Present | Mean | Standard deviation | Genomes analyzed |
Lophotrochozoans | 16 | 545 | 4,215 | 3,605 | 320 | 3 |
Annelids | 16 | 721 | 4,039 | 3,602 | 393 | 2 |
Ecdysozoans | 24 | 736 | 4,032 | 3,202 | 190 | 12 |
Arthropods | 38 | 864 | 3,918 | 3,256 | 172 | 9 |
Nematodes | 39 | 1,477 | 3,306 | 3,039 | 143 | 3 |