Gwiddonyn yw'r gwiddonyn ŷd (Sitophilus granarius) sy'n bla ar gnydau ŷd ar draws y byd.
| Gwiddonyn ŷd | |
|---|---|
 | |
| Dosbarthiad gwyddonol | |
| Teyrnas: | Animalia |
| Ffylwm: | Arthropoda |
| Dosbarth: | |
| Urdd: | Coleoptera |
| Teulu: | Curculionidae |
| Genws: | Sitophilus |
| Rhywogaeth: | S. granarius |
| Enw deuenwol | |
| Sitophilus granarius (Linnaeus, 1758) [1] | |
Cyfeiriadau
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