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The crowned pigeons (''Goura'') consists of three species, the western crowned pigeon (''Goura cristata''), the southern crowned pigeon (''Goura scheepmakeri'') and the Victoria crowned pigeon (''Goura victoria''). They are the largest extant members of the pigeons clade, (Columbidae). The three crowned pigeons are alike and replace each other geographically. The genus was described by James Francis Stephens in 1819. == Systematics and evolution == The phylogeny of the crowned pigeons is not well resolved. Several molecular analyses have been conducted (e.g. Johnson &, 2000), with one (Shapiro ''et al.'', 2002) suggesting that along with the Nicobar pigeon and the tooth-billed pigeon of Samoa, the three ''Goura'' pigeons belong to a group of which the unfortunate dodo and the Rodrigues solitaire are an offshoot lineage, but depending on which genetic sequence is analyzed, the placement of the crowned pigeon differs. They might belong to the Treroninae subfamily of the fruit-doves, but usually they are treated as a subfamily of their own, the Gourinae. The following cladogram, from Shapiro and colleagues (2002), shows their closest relationships within Columbidae, a clade consisting of generally ground-dwelling island endemics. }} }} }} |2=''Didunculus strigirostris'' (tooth-billed pigeon) }} }} A similar cladogram was published in 2007, differing only in the inverted placement of ''Goura'' and ''Didunculus'', as well as in the inclusion of the pheasant pigeon and the thick-billed ground pigeon at the base of the clade. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「crowned pigeon」の詳細全文を読む スポンサード リンク
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