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Morphology, vocalizations, and mitochondrial DNA suggest that the Graceful Prinia is two species
The Auk ( IF 2.3 ) Pub Date : 2021-04-28 , DOI: 10.1093/ornithology/ukab014
Per Alström 1, 2 , Pamela C Rasmussen 3, 4 , Canwei Xia 1, 5 , Lijun Zhang 1 , Chengyi Liu 1 , Jesper Magnusson 1 , Arya Shafaeipour 6 , Urban Olsson 7, 8
Affiliation  

Prinias (Cisticolidae: Prinia) are resident warblers of open areas across Africa and Asia and include many polytypic species whose species limits have not been seriously reevaluated recently. Based on an integrative taxonomic analysis of morphology, song, and mitochondrial DNA (mtDNA), we suggest that 2 species should be recognized in the Graceful Prinia (Prinia gracilis) complex. In addition, our morphological analyses show the existence of a well-marked undescribed form in southeastern Somalia, which we name herein as a new subspecies. Prinia gracilis is a small, drab, long-tailed species with streaking above and plain pale underparts that has been suggested to fall into 2 groups: the southwestern nominate group (from Egypt to Oman) and the northeastern lepida group (from Turkey through India). However, the characters presented to justify this grouping are variable and show a mosaic pattern, and whether genetic and vocal differences exist is unknown. We found consistent between-group song differences, with the nominate group giving consistently longer inter-phrase intervals, whereas the members of the lepida group sing an essentially continuous reel. An mtDNA tree suggests a deep split between the nominate and lepida groups, with a coalescence time between these clades of ~ 2.2 million years ago. Vocal and mtDNA analyses provided evidence that the northeastern Arabian Peninsula taxon carpenteri belongs to the lepida group. We found that, of all the morphological characters proposed, only proportions and tail barring and spotting relatively consistently distinguish the 2 groups. However, these characters strongly suggest that the eastern Arabian Peninsula is populated by taxa of both the gracilis and lepida groups, in different areas, but we lack genetic and bioacoustic data to corroborate this. Although further study is needed in potential contact zones, we suggest that 2 species should be recognized in the P. gracilis complex, and we propose the retention of the English name Graceful Prinia for P. gracilis sensu stricto, while we suggest that P. lepida be known as Delicate Prinia.

中文翻译:

形态、发声和线粒体 DNA 表明优雅的 Prinia 是两个物种

Prinias(Cisticolidae:Prinia)是非洲和亚洲开阔地区的常驻莺,包括许多多型物种,其物种限制最近没有得到认真重新评估。基于形态学、歌曲和线粒体 DNA (mtDNA) 的综合分类学分析,我们建议在优雅的 Prinia (Prinia gracilis) 复合体中应识别 2 个物种。此外,我们的形态分析表明,在索马里东南部存在一种明显未描述的形式,我们在此将其命名为新亚种。Prinia gracilis 是一种小型、单调、长尾的物种,上面有条纹,下面是浅色的,被认为分为 2 组:西南指名组(从埃及到阿曼)和东北部 lepida 组(从土耳其到印度) . 然而,为证明这一分组的合理性而呈现的角色是可变的并显示出马赛克图案,并且是否存在遗传和声音差异尚不清楚。我们发现组间的歌曲差异是一致的,提名组的乐句间隔始终更长,而 lepida 组的成员则唱出基本连续的卷轴。mtDNA 树表明提名和 lepida 组之间存在深度分裂,这些进化枝之间的合并时间约为 220 万年前。声乐和 mtDNA 分析提供了证据,证明阿拉伯半岛东北部的分类单元 carpenteri 属于 lepida 组。我们发现,在提出的所有形态特征中,只有比例和尾部禁止和斑点相对一致地区分了两组。然而,这些特征强烈表明阿拉伯半岛东部由不同地区的股薄类和鳞类群组成,但我们缺乏遗传和生物声学数据来证实这一点。尽管潜在接触区需要进一步研究,但我们建议应在 P. gracilis 复合体中识别 2 个物种,我们建议保留 P. gracilis sensu stricto 的英文名称 Graceful Prinia,而我们建议 P. lepida被称为精致的Prinia。
更新日期:2021-04-28
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