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首页> 外文期刊>Journal of Parasitology >PHYLOGENY OF SPECIES OF SCIADICLEITHRUM (MONOGENOIDEA: ANCYROCEPHALINAE), AND THEIR HISTORICAL BIOGEOGRAPHY IN THE NEOTROPICS
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PHYLOGENY OF SPECIES OF SCIADICLEITHRUM (MONOGENOIDEA: ANCYROCEPHALINAE), AND THEIR HISTORICAL BIOGEOGRAPHY IN THE NEOTROPICS

机译：嗜神经性鞘磷脂（MONOGENOIDEA：小球藻）的种类及其新生物的历史生物地理学

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摘要

The phylogenetic relationships and historical biogeography of species of Sciadicleithrum parasitizing Neotropical cichlid fishes were studied. Hypotheses were: Did the presence of Sciadicleithrum species in southeast Mexico (SM) and Central America (CA) result from early dispersal of cichlid species from South America (SA) to the north via the Antilles during the Tertiary (24 million years ago [mya]), or did it occur after emergence of the Panama Isthmus in the Pleistocene (2–5 mya)? The Sciadicleithrum phylogeny was based on 19 morphological transformation series, with species of Gussevia and Cichlidogyrus as outgroups. The most parsimonious cladogram had a 40% consistency index, with one clade including all the species of Sciadicleithrum from SA and all but one of those from CA and another with all the Sciadicleithrum species from SM and S. maculicaudae from CA. Results support the late dispersal hypothesis following emergence of the Panama Isthmus. Fifteen species of Sciadicleithrum parasitize 13 cichlid species from SA and CA. In contrast, only 4 species of Sciadicleithrum infect 14 cichlid species from SM. Parasite speciation appears to lag behind host speciation, with 2 equally possible explanations: loss of parasite species and host switching.
机译：研究了寄生于新热带丽鱼科鱼的刀鞘蝇科物种的系统发育关系和历史生物地理学。假设是：墨西哥东南部（SM）和中美洲（CA）of虫科物种的存在是否是由于第三纪（2400万年前，第三纪）从南美（SA）经由安的列斯群岛的丽鱼科物种向北扩散的结果？ ]），还是在更新世（2-5 mya）的巴拿马地峡出现后发生的？剑鞘菌的系统发育是基于19个形态学转化系列，古斯维亚和慈鲷科的物种为外群。最简约的分支图具有40％的一致性指数，其中一个分支包括来自SA的所有剑孢菌种，除CA之外的所有一种，而另一个则包括来自SM和Maculicaudae的所有剑孢菌种。结果支持了巴拿马地峡出现后的后期弥散假设。十五种鞘翅目寄生有来自SA和CA的13种丽鱼科鱼。相比之下，仅4种刀剑鞘杆菌感染了14种来自SM的丽鱼科鱼。寄生虫物种形成似乎落后于宿主物种形成，有两种同样可能的解释：寄生虫物种的丧失和宿主的转换。

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    《Journal of Parasitology》 |2005年第2期|p.00000253-00000259|共7页
  • 作者

    Edgar F. Mendoza-Franco and Víctor M. Vidal-Martínez;

  • 作者单位

    Laboratory of Parasitology, Centro de Investigación y de Estudios Avanzados (CINVESTAV, Unidad Mérida), Carretera Antigua a Progreso Km. 6, Apartado Postal 73 Cordemex, 97310 Mérida, Yucatan, Mexico. mfranco@mda.cinvestav.mx;

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