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Slekta hører til i familien lomfamilien, Gaviidae.
Storlom, Gavia arctica Ole Eirik Torsteinsen ©. | Islom, Gavia immer "Great Northern Diver - Gavia immer - Himbrimi" by Omarrun via Flickr, Creative Commons Attribution. |
Smålom, Gavia stellata "Red-throated Diver - Gavia stellata - Lómur" by Omarrun via Flickr, Creative Commons Attribution. |