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Branta rhuax
''Branta rhuax'' is an extinct goose, or large gooselike bird, that used to live in the Hawaiian Islands. It is was initially described into the monotypic genus ''Geochen'' but assigned to ''Branta'' by Storrs L. Olson in 2013 after reexamination of the subfossil material.
==History==
The bird was described in 1943 by Alexander Wetmore from subfossil remains originally discovered in 1926, in the course of a public works excavation of a water supply tunnel. The bones were found at a depth of 25 m beneath a prehistoric lava flow, on top of an ash bed, near Kaumaikeohu, above Pahala in the Kau District of the Island of Hawaii. The bones are friable and warped, having been subjected to intense heat from the lava. The specific epithet comes from the Greek ''rhuax'' (lava stream). The holotype is a fragmentary right tibiotarsus (USNM V16740) held by the United States National Museum of Natural History in Washington D.C.. It was the first fossil bird to be described from the Hawaiian Islands.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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