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首页> 外文期刊>Biological Journal of the Linnean Society >Taxonomy, genetic differentiation and Holarctic biogeography ofParanoplocephala spp. (Cestoda : Anoplocephalidae) in collared lemmings(Dicrostonyx; Arvicolinae)
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Taxonomy, genetic differentiation and Holarctic biogeography ofParanoplocephala spp. (Cestoda : Anoplocephalidae) in collared lemmings(Dicrostonyx; Arvicolinae)

机译：翼龙属的分类学，遗传分化和整体生物地理学。 （Cestoda：无头目的科）衣领旅鼠（Dicrostonyx; Arvicolinae）

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摘要

The present study reviews the taxonomy of anoplocephalid cestodes of collared lemmings (Dicrostonyx spp.) and describes the patterns of cestode biogeography in the Holarctic region. The morphological differentiation of cestode species is augmented with a genetic differentiation based on three independent markers. We show that collared lemmings are parasitized by five host-specific species of Paranoplocephala, three of which are described here as new: P. arctica (Rausch, 1952), P. alternata sp. nov., R serrata Haukisalmi & Henttonen, 2000, P. nordenskioeldi sp. nov. and R krebsi sp. nov. The redescription of R arctica shows that the original description of this species is composite. Paranoplocephala alternata, P serrata and R nordenskioeldi are shown to have a Holarctic distribution, whereas R arctica and R,krebsi are restricted to the Nearctic region, including Wrangel Island. It is suggested that the Holarctic species colonized North America concomitantly with their hosts and that the appearance of the Nearctic species is connected with the subsequent divergence of collared lemmings in North America. Geographical distribution and sequence data for the first transcribed spacer (ITS1) of nuclear rDNA show that R alternata and R arctica are sister taxa and that the latter species probably diverged from R alternata in eastern Beringia. Other phylogenetic relationships among cestode species remained largely unsettled.
机译：本研究回顾了颈圈动物（Dicrostonyx spp。）的无头cephal类的分类学，并描述了霍拉克蒂奇地区鲸类生物地理的模式。基于三个独立标记的遗传分化增强了种est的形态分化。我们显示衣领旅人被寄生于寄生虫的五个寄主特定物种，其中三个在这里被描述为新物种：P. arctica（Rausch，1952），P. alternata sp。 11月，R serrata Haukisalmi和Henttonen，2000年，P。nordenskioeldi sp。十一月和R krebsi sp。十一月R arctica的重新描述表明，该物种的原始描述是复合的。研究显示，轮齿旁纲，锯齿状锯齿状动物和诺登斯基洛迪河具有Holarctic分布，而R arctica和R，krebsi则局限于包括Wrangel岛在内的Nearctic地区。有迹象表明，霍拉克特种与它们的寄主一起在北美定居，而近北种的出现与随后在北美的圈养旅鼠的发散有关。核rDNA的第一个转录间隔区（ITS1）的地理分布和序列数据表明，互生孢子虫和大弧菌属是姊妹类群，后一种可能与白令东东部的互生菌不同。尾est物种之间的其他系统发育关系仍未解决。

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