Description of a new species of Phylloscopus warbler from Vietnam and Laos
Description of a new species of Phylloscopus warbler from Vietnam and Laos
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DOI：
10.1111/j.1474-919x.2009.00990.x
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发表时间：
2010-01-01
期刊：
影响因子：
2.1
通讯作者：
Timmins, Rob
中科院分区：
文献类型：
--
作者：
Alstrom, Per;Davidson, Pete;Timmins, Rob
一种新的柳莺，我们称之为Phylloscopus calciatilis石灰石叶莺，描述于越南中部和北方以及老挝中部和北方;它可能也在中国最南部繁殖。在形态上，该新种与硫胸柳莺Phylloscopus ricketti非常相似，但它较小，喙较大，翅膀较圆。它的歌声和叫声是诊断性的。根据线粒体和细胞核DNA分析，该新种与李氏柳莺和黄喉柳莺亲缘关系最近，推测为后者的姐妹。这三个物种之间的线粒体分歧是在低端的变化，发现在其他物种的Phylloscopus和Seicercus莺，但大于其他类群一般被视为亚种。新物种和P. ricketti之间可能的渐渗杂交进行了讨论，但需要更多的数据来确定它是否发生，如果发生，在多大程度上。新物种似乎在石灰岩岩溶环境中有一个有限的繁殖范围，在那里它是当地常见的，因此不会受到任何直接的威胁。鉴于新物种的确认，所有以前的P. ricketti sensu lato记录需要重新评估。
A new species of Phylloscopus warbler, which we name Phylloscopus calciatilis Limestone Leaf Warbler, is described from central and northern Vietnam and central and northern Laos; it probably also breeds in southernmost China. In morphology, the new species is very similar to Sulphur-breasted Warbler Phylloscopus ricketti, but it is smaller with a proportionately larger bill and rounder wing. Its song and calls are diagnostic. Based on mitochondrial and nuclear DNA, the new species is most closely related to P. ricketti and Yellow-vented Warbler Phylloscopus cantator, and it is inferred to be sister to the latter. The mitochondrial divergences between these three species are at the low end of the variation found in other species of Phylloscopus and Seicercus warblers, but greater than in other taxa generally treated as subspecies. Possible introgressive hybridization between the new species and P. ricketti is discussed, but more data are needed to establish whether it does occur and, if it does, to what extent. The new species appears to have a restricted breeding range in limestone karst environments, where it is locally common and therefore not under any immediate threat. In view of the recognition of the new species, all previous records of P. ricketti sensu lato need to be re-evaluated.