• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Systematic Parasitology >Syndesmis aethopharynx Westervelt & Kozloff, 1990 (Rhabdocoela: Umagillidae): a revisitation supported by scanning electron microscopy and molecular analyses
【24h】

Syndesmis aethopharynx Westervelt & Kozloff, 1990 (Rhabdocoela: Umagillidae): a revisitation supported by scanning electron microscopy and molecular analyses

机译：Syndesmis Aethopharynx Westervelt＆amp; Kozloff，1990（rhabdocoela：Umagillidae）：通过扫描电子显微镜和分子分析支持的重新审核

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Species of Syndesmis Francois, 1886 are rhabdocoel platyhelminths typically found in echinoids. Our knowledge of this group is based on old and insufficient studies, generally representing light microscopy-based species descriptions. Syndesmis aethopharynx Westervelt & Kozloff, 1990 is an understudied endosymbiont of Paracentrotus lividus (Lamarck), which is likely to have been confused with the type-species, i.e. Syndesmis echinorum Francois, 1886, in the literature. In this work, S. aethopharynx is revisited based on new data on surface morphology and phylogeny and basic ecological data are provided. Scanning electron microscopy analysis revealed that the whole ventral region of the worm is equipped with cilia, which supports the assumption that the unciliated epidermal area reported for some species of umagillids, likewise endosymbiotic in echinoderms, is an apomorphy. Following the results of the molecular phylogenetic analysis, species of Syndesmis are closely-related to symbionts of other echinoderms, i.e. holothurians, and like them, may have evolved from some free-living or symbiotic Provorticidae ancestor. Syndesmis spp. may stand for a key group in studying the evolution of feeding strategies in rhabdocoels, as their phylogenetic position is between intestinal and coelomic symbionts, and since both the digestive tube and perivisceral fluid were recorded as sites of infection. The infection levels were low, likely reflecting the aggregated distribution of the host and the fragile nature of the symbiont.
机译：Syndesmis Francois的种类，1886年是通常在echinoids中发现的rhabdocoel platyhelminths。我们对该组的了解是基于旧的和不足的研究，通常代表基于光学显微镜的物种描述。 Syndesmis Aethopharynx Westervelt＆amp; Kozloff，1990年是一只ParacerateRotus Lividus（Lamarck）的胆汁患者，这可能与类型的类型混淆，即Syndesmis Echinorum Francois，1886年，在文献中。在这项工作中，基于关于表面形态的新数据进行重新求解的，提供了基础和系统的新数据和基本生态数据。扫描电子显微镜分析显示，蠕虫的整个腹侧区域配备纤毛，这支持假设报道的未报道某些种类的腹膜异常在棘皮药中的硫代肾上腺症，是一种流离症。在分子系统发育分析的结果之后，Syndesmis的种类与其他Echinoderms的共生密切相关，即Holothurans，也可以像它们一样，可能已经从一些自由生或共生的普罗生岛祖先演变。 Syndesmis SPP。可以代表在研究rhabdocoels中喂养策略的演变的关键组，因为它们的系统发育位置在肠道和肠道共生之间，并且由于消化管和隐藏液都被记录为感染部位。感染水平低，可能反映了宿主的聚集分布和Symbiont的脆弱性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号