''Shiriyanetta hasegawai'' is an extinct species of seaduck from the Pleistocene of

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

. It was flightless, similar to the also extinct '' Chendytes'' from the opposite side of the Pacific.

References

Merginae Extinct flightless birds Late Quaternary prehistoric birds Extinct animals of Japan Fossil taxa described in 2015 {{paleo-bird-stub