Description of a new Malagasy treefrog (Boophis) occurring syntopically with its sister species, and a plea for studies on non-allopatric speciation in tropical amphibians
Description of a new Malagasy treefrog (Boophis) occurring syntopically with its sister species, and a plea for studies on non-allopatric speciation in tropical amphibians
复制标题
描述一种新的马达加斯加树蛙（Boophis）与其姐妹物种同位共存，并呼吁研究热带两栖动物的非异域物种形成
DOI：
10.1163/15685381-00002856
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发表时间：
2012
影响因子：
1.6
通讯作者：
F. Glaw
中科院分区：
文献类型：
--
作者：
M. Vences;Marcelo Gehara;J. Köhler;F. Glaw
基于雄性广告叫声、蝌蚪形态的一致性差异，以及线粒体和核DNA标记单倍型共享的缺失，我们描述了马达加斯加中南部Ranomafana国家公园的一种新的树蛙。在其成年阶段，narinsi Boophis sp. n.与它的姐妹物种Boophis majori高度相似，但在后肢较长方面似乎有所不同。这两个物种之间的遗传差异（16S rRNA基因片段的2.5-3.3%，取决于片段长度和分析的个体单倍型）低于典型的无尾猿不同物种特征的阈值。再加上它们相对较小且大部分重叠的分布范围，以及它们在Ranomafana国家公园的同地分布，这表明它们可能是最近在异地或同地条件下通过适应性物种形成而起源的。迄今为止，大多数关于两栖动物物种形成的研究都默认假设了替代物种的形成。我们建议，在未来的工作中，应该考虑替代的物种形成情景，并描述可以进行更可靠的适应性异域或同域物种形成评估的环境。
Based on concordant differences in male advertisement call, tadpole morphology, and absence of haplotype sharing in mitochondrial and nuclear DNA markers, we describe a new species of treefrog from Ranomafana National Park in the southern central east of Madagascar. In its adult stage Boophis narinsi sp. n. is highly similar to its sister species, Boophis majori, but appears to differ in having longer hindlimbs. The genetic divergences between these two species (2.5-3.3% in a fragment of the 16S rRNA gene, depending on fragment length and individual haplotype analyzed) are below the threshold typically characterizing distinct species of anurans. Together with their relatively small and largely overlapping ranges and their sympatric occurrence in Ranomafana National Park, this indicates that they potentially could have originated rather recently by adaptive speciation under parapatric or sympatric conditions. Most studies on amphibian speciation have so far by default assumed vicariant speciation. We suggest that alternative speciation scenarios should be considered in future works and characterize settings in which more reliable assessments of adaptive parapatric or sympatric speciation could be carried out.