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Oligocene divergence of frogmouth birds (Podargidae) across Wallace's Line.
Biology Letters ( IF 3.3 ) Pub Date : 2020-05-13 , DOI: 10.1098/rsbl.2020.0040 Paul M Oliver 1, 2 , Holly Heiniger 3 , Andrew F Hugall 4 , Leo Joseph 5 , Kieren J Mitchell 3
Biology Letters ( IF 3.3 ) Pub Date : 2020-05-13 , DOI: 10.1098/rsbl.2020.0040 Paul M Oliver 1, 2 , Holly Heiniger 3 , Andrew F Hugall 4 , Leo Joseph 5 , Kieren J Mitchell 3
Affiliation
Wallace's Line demarcates the transition between the differentiated regional faunas of Asia and Australia. However, while patterns of biotic differentiation across these two continental landmasses and the intervening island groups (Wallacea) have been extensively studied, patterns of long-term dispersal and diversification across this region are less well understood. Frogmouths (Aves: Podargidae) are a relictual family of large nocturnal birds represented by three extant genera occurring, respectively, in Asia, 'Sahul' (Australia and New Guinea) and the Solomon Islands, thus spanning Wallace's Line. We used new mitochondrial genomes from each of the extant frogmouth genera to estimate the timeline of frogmouth evolution and dispersal across Wallace's Line. Our results suggest that the three genera diverged and dispersed during the mid-Cenozoic between approximately 30 and 40 Mya. These divergences are among the oldest inferred for any trans-Wallacean vertebrate lineage. In addition, our results reveal that the monotypic Solomons frogmouth (Rigidipenna inexpectata) is one of the most phylogenetically divergent endemic bird lineages in the southwest Pacific. We suggest that the contemporary distribution of exceptionally deep divergences among extant frogmouth lineages may be explained by colonization of, and subsequent long-term persistence on, island arcs in the southwest Pacific during the Oligocene. These island arcs may have provided a pathway for biotic dispersal out of both Asia and Australia that preceded the formation of extensive emergent landmasses in Wallacea by at least 10 million years.
中文翻译:
蛙嘴鸟(Podargidae)的渐新世发散穿过华莱士的线。
华莱士之线划定了亚洲和澳大利亚不同的区域动物之间的过渡。然而,尽管已经广泛研究了这两个大陆陆地和中间岛群(华莱士)的生物分化模式,但对该区域的长期分散和多样化模式却知之甚少。Frogmouths(Aves:Podargidae)是大型夜行性鸟类的遗属家族,分别以三个现存属为代表,分别出现在亚洲的'Sahul'(澳大利亚和新几内亚)和所罗门群岛,从而跨越了华莱士的防线。我们使用每个现存的蛙嘴属的新线粒体基因组来估计蛙嘴进化和在华莱士线之间扩散的时间表。我们的研究结果表明,这三个属在新生代中期约30至40 Mya期间发生了分散和分散。这些差异是任何反华莱士脊椎动物血统中最古老的。此外,我们的研究结果表明,单型所罗门氏蛙嘴(Rigidipenna inexpectata)是西南太平洋地区最系统发育的地方性鸟类谱系之一。我们建议,在渐新世期间西南太平洋岛弧的定居以及随后的长期持续存在,可以解释现存蛙嘴谱系之间极深分歧的当代分布。这些岛弧可能为生物扩散出亚洲和澳大利亚提供了一条途径,而这在华莱士形成广泛的新兴陆块之前至少已有一千万年。
更新日期:2020-05-13
中文翻译:
蛙嘴鸟(Podargidae)的渐新世发散穿过华莱士的线。
华莱士之线划定了亚洲和澳大利亚不同的区域动物之间的过渡。然而,尽管已经广泛研究了这两个大陆陆地和中间岛群(华莱士)的生物分化模式,但对该区域的长期分散和多样化模式却知之甚少。Frogmouths(Aves:Podargidae)是大型夜行性鸟类的遗属家族,分别以三个现存属为代表,分别出现在亚洲的'Sahul'(澳大利亚和新几内亚)和所罗门群岛,从而跨越了华莱士的防线。我们使用每个现存的蛙嘴属的新线粒体基因组来估计蛙嘴进化和在华莱士线之间扩散的时间表。我们的研究结果表明,这三个属在新生代中期约30至40 Mya期间发生了分散和分散。这些差异是任何反华莱士脊椎动物血统中最古老的。此外,我们的研究结果表明,单型所罗门氏蛙嘴(Rigidipenna inexpectata)是西南太平洋地区最系统发育的地方性鸟类谱系之一。我们建议,在渐新世期间西南太平洋岛弧的定居以及随后的长期持续存在,可以解释现存蛙嘴谱系之间极深分歧的当代分布。这些岛弧可能为生物扩散出亚洲和澳大利亚提供了一条途径,而这在华莱士形成广泛的新兴陆块之前至少已有一千万年。