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・ Uromyces viciae-fabae var. viciae-fabae
・ Uromycladium
・ Uromyias
・ Urocordylidae
・ Urocordylinae
・ Urocordylus
・ Urocortin
・ Urocortin II
・ Urocortin III
・ Urocotyledon
・ Uroctea
・ Uroctea durandi
・ Urocyclidae
・ Urocyclus
・ Urocyon
Urocyon progressus
・ Urocystales
・ Urocystis
・ Urocystis agropyri
・ Urocystis brassicae
・ Urocystis occulta
・ Uroczysko Leśne
・ Urodacus
・ Urodacus elongatus
・ Urodacus manicatus
・ Urodacus yaschenkoi
・ Urodan
・ Uroderma
・ Uroderostenus
・ Urodeta


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Urocyon progressus : ウィキペディア英語版
Urocyon progressus

''Urocyon progressus'', also known as the progressive gray fox, is an extinct carnivorous mammal of the genus ''Urocyon'', and was most common in North America during the Blancan Stage on the geologic timescale. Fossil samples have been found in both Kansas and Texas. It may have been the ancestor of the modern gray fox.
== Taxonomy ==
The holotype of the species was found by Claude W. Hibbard during the summer of 1959. It was a complete left parietal bone, with two paratypes, being; an upper left molar and an incomplete left tibia. All of these were found in the Upper Pliocene Rexroad Formation in Meade County, Kansas. These became the oldest remains of the genus ''Urocyon'' discovered.〔 Additional examples were also found in the Love Formation, in Hudspeth County, Texas.〔(【引用サイトリンク】url=http://flatpebble.nceas.ucsb.edu/cgi-bin/bridge.pl?action=displayCollectionDetails&collection_no=20051 )〕 Margaret Skeele Stevens described the species in the ''Journal of Mammalogy'' in May, 1965.

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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