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首页> 外文期刊>Journal of Parasitology >MOLECULAR PHYLOGENY OF HAEMATOLOECHUS LOOSS, 1899 (DIGENEA: PLAGIORCHIIDAE), WITH EMPHASIS ON NORTH AMERICAN SPECIES
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MOLECULAR PHYLOGENY OF HAEMATOLOECHUS LOOSS, 1899 (DIGENEA: PLAGIORCHIIDAE), WITH EMPHASIS ON NORTH AMERICAN SPECIES

机译：1899年哈马足LO失禁的分子系统发育（第纪属植物：PLA蛾科），着重于北美种

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摘要

Phylogenetic hypothesis of 23 populations corresponding to 18 species of the digenean Haematoloechus from America, Europe, and Africa, based on ribosomal DNA 28S partial sequences (890 bp), is presented. Genetic divergence between the in-group and the out-groups ranged from 9.7 to 14.5% and within the in-group, from 0.9 to 12.2%. Eight most parsimonious trees 569 steps long were obtained, with a consistency index of 72%. Groups in the tree are not congruent with those in previous classification schemes of species in the genus, based on a small number of morphological characters. For this subset of Haematoloechus species, plesiomorphic hosts are species of Rana, with 2 colonizations to other amphibian groups. African species appear to have diverged after the separation of Gondwana and Laurasia. Therefore, South American species should appear as the closest relatives of African species when included in the analysis. The evidence presented suggests an ancestral wide distribution of North American representatives of the group, followed by successive contraction, amplification, and fragmentation of ranges and speciation events as a result of the intense volcanic activity in the central part of Mexico since the late Tertiary, the drying climate of western and central United States and northwestern Mexico from the early Eocene to the Pleistocene, and the glaciation during the Pleistocene.
机译：基于核糖体DNA 28S部分序列（890 bp），提出了对应于来自美国，欧洲和非洲的双基因Haematoloechus的18个物种的23个种群的系统发生假说。群体内和群体外的遗传差异为9.7％至14.5％，群体内的遗传差异为0.9％至12.2％。获得了569步长的八棵最简约的树木，一致性指数为72％。基于少量的形态特征，树中的组与该属中先前的物种分类方案中的组不完全相同。对于该血球菌属物种的子集，拟态宿主是林蛙的物种，对其他两栖动物群体有2个定植。冈瓦纳和劳拉西亚分离后，非洲物种似乎分化了。因此，在分析中将南美物种视为非洲物种的近亲。所提供的证据表明，该组北美代表的祖先分布广泛，随后由于自第三纪晚期以来墨西哥中部地区的激烈火山活动，相继收缩，放大，范围和物种形成事件破碎化。美国西部和中部以及墨西哥西北部从始新世到更新世的干燥气候，以及在更新世的冰川期。

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    《Journal of Parasitology》 |2003年第6期|p.1206-1211|共6页
  • 作者

    Virginia León-Règagnon and Daniel R. Brooks*;

  • 作者单位

    Laboratorio de Helmintología, Instituto de Biología, Universidad Nacional Autónoma de México, Apartado Postal 70-153, CP 04510 México, D.F., México. vleon@ibiologia.unam.mx*Department of Zoology, University of Toronto, 25 Harbord Street, Toronto, Ontario, Canada M5S 3G5;

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