Infertebrat o ffylwm yr Annelida gyda chorff hirgul ceudodog (selomog) cylchrannog yw anelidau (neu lyngyr cylchrannog). Mae tua 15,000 o rywogaethau, gan gynnwys pryfed genwair, abwyd tywod, abwyd gwyrdd, abwyd melys, llyngyr cynffonnog a gelod.
| Delwedd:Regenwurm1.jpg, Nereis pelagica.jpg | |
| Enghraifft o'r canlynol | tacson  |
|---|---|
| Math | Infertebrat, worm |
| Dyddiad cynharaf | Mileniwm 531. CC |
| Safle tacson | Ffylwm |
| Rhiant dacson | Spiralia |
| Dechreuwyd | Mileniwm 517. CC |
 Ffeiliau perthnasol ar Gomin Wicimedia | |
| Anelidau | |
|---|---|
 | |
| Mwydyn coch (Glycera) | |
| Dosbarthiad gwyddonol | |
| Teyrnas: | Animalia |
| Ffylwm: | Annelida Lamarck, 1809 |
| Dosbarthiadau | |
|
Polychaeta
Myzostomida | |
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