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The spotted green pigeon or Liverpool pigeon (''Caloenas maculata'') is a presumed extinct pigeon species of unknown provenance. It is currently known only from a single specimen reposited in the World Museum of the National Museums Liverpool; this specimen is presumed to have been collected from French Polynesia (possibly Tahiti) some time between 1783 and 1823. ==Taxonomy== The spotted green pigeon was first mentioned in the work ''A General Synopsis of Birds'' (1783), World Museum Liverpool by John Latham and scientifically named by Johann Friedrich Gmelin in 1789. On basis of the elongated neck feathers John Latham assumed a relationship with the Nicobar pigeon and Lord Rothschild regarded it as just an aberrant specimen of that species. It was probably due to Rothschild's influence that the spotted green pigeon was often overlooked by subsequent authors. Notwithstanding, it was very different from the Nicobar pigeon.〔 In 1851, a juvenile specimen came into the museum collection of the Earl of Derby in Knowsley Hall which is now in the collection of the World Museum Liverpool. A second specimen which belonged to Joseph Banks is lost, and there may have been a third specimen in the Leverian collection. Although the spotted green pigeon is enigmatic and only known from one museum specimen, the species can be distinguished by DNA sequencing and molecular phylogeny. A 2014 study by Heupink et al. extracted DNA and compared its sequence with those of pigeon and brown mesite sequences available from GenBank. They created two phylogenetic trees, one of all sampled Columbidae, and the other specifiying on ''Caloenas'', ''Didunculus'', Raphinae, and ''Goura, ''as'' ''depicted below''.'' |2= }} }} 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「Spotted green pigeon」の詳細全文を読む スポンサード リンク
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