Plotopteridae
| Plotopterids Temporal range: Eocene – Miocene |
|
|---|---|
 |
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| Copepteryx | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Suliformes |
| Family: |
Plotopteridae Howard, 1969 |
| Genera | |
|
Copepteryx |
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Copepteryx
Hokkaidornis
Klallamornis
Olympidytes
Phocavis
Plotopterum
Stemec
Tonsala
Plotopteridae is the name of an extinct family of flightless seabirds from the order Suliformes. Related to the gannets and boobies, they exhibited remarkable convergent evolution with the penguins, particularly with the now extinct giant penguins. That they lived in the North Pacific, the other side of the world from the penguins, has led to them being described at times as the Northern Hemisphere's penguins, though they were not closely related. More recent studies have shown, however, that the shoulder-girdle, forelimb and sternum of plotopterids differ significantly from those of penguins, so comparisons in terms of function may not be entirely accurate.
Their fossils have been found in California, Washington, British Columbia and Japan. They ranged in size from that of a large cormorant (such as a Brandt's cormorant), to being 2 m long. They had shortened wings designed for underwater wing-propelled pursuit diving (like penguins or the now extinct great auk), a body skeleton similar to that of the darter and the skull similar to that of a sulid.
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Wikipedia