Evolution of the unique freshwater cave‐dwelling tube worm Marifugia cavatica (Annelida: Serpulidae)
Evolution of the unique freshwater cave‐dwelling tube worm Marifugia cavatica (Annelida: Serpulidae)
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独特的淡水穴居管虫 Marifugia cavatica（环节动物门：Serpulidae）的进化
DOI：
10.1017/s1477200009990168
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发表时间：
2009
影响因子：
1.9
通讯作者：
G. Rouse
中科院分区：
文献类型：
--
作者：
E. Kupriyanova;H. T. ten Hove;B. Šket;V. Zakšek;P. Trontelj;G. Rouse
摘要在已描述的约350种锯齿类多毛类中，只有空穴马鞭藻生活在淡水中。它分布在意大利东北部、斯洛文尼亚、克罗地亚、波斯尼亚和荷兰的迪纳里克喀斯特的地下水中。在世界各地的咸水水域中，还发现了另外五种锯齿类动物，包括锯齿鱼属；除此之外，锯齿类都是海洋生物。我们重新描述了空穴毛虫，并用扫描电子显微镜观察了它的毛节的精细结构，总结了它的分布。马里福亚目的形态为其系统发育关系提供了一个模棱两可的指示，因此也使用了DNA序列数据。用最大简约度、最大似然法和贝叶斯分析对核rDNA 18S和28S序列进行的系统发育分析表明，Marifugia是微咸水鱼支系的姊妹群。因此，渗透整合和渗透到非海洋水域似乎在蛇科的进化史上只发生过一次。向地下环境的转变可能是通过祖先的海洋浅水转变为潮间带或河口物种(如鱼)，这些物种进化出必要的生理机制来抵御低盐度，然后通过水面湖泊进入淡水洞穴。
Abstract Of the approximately 350 described species of serpulid polychaetes, only Marifugia cavatica inhabits fresh water. It is distributed in ground waters of the Dinaric Karst in northeastern Italy, Slovenia, Croatia, and Bosnia and Hercegovina. Five other serpulid species, comprising the genus Ficopomatus, are found in brackish water locations worldwide; otherwise serpulids are all marine organisms. We re‐describe M. cavatica and examine the fine structure of its chaetae with SEM as well as summarise its distribution. The morphology of Marifugia provides an ambiguous indication of its phylogenetic relationships, thus DNA sequence data was also used. Phylogenetic analysis of nuclear rDNA 18S and 28S sequences using maximum parsimony, maximum likelihood and Bayesian analyses places Marifugia as a sister group to a clade of brackish‐water Ficopomatus species. Osmoconformity and penetration into non‐marine waters hence appears to have taken place once in the evolutionary history of Serpulidae. The transition to a subterranean environment may have occurred via ancestral marine shallow water to intertidal or estuarine species (like Ficopomatus) that evolved the necessary physiological mechanisms to withstand low salinity and then penetrated into freshwater caves via surface lakes.
评估培养的牛尿路上皮细胞的分化状态：分层相关 K5 和 K6 角蛋白的合成增加以及尿斑蛋白 I 的持续表达。
影响因子：
4
作者：
Surya,B;Yu,J;Manabe,M;Sun,TT
通讯作者：
Sun,TT