Abstract：
Relative to the numerous studies focused on mammalian schistosomes, fewer include avian schistosomatids particularly in the southern hemisphere. This is changing and current research emerging from the Neotropics shows a remarkable diversity of endemic taxa. To contribute to this effort, nine ducks (Spatula cyanoptera, S.versicolor, Netta peposaca), 12 swans (Cygnus melancoryphus) and 1,400 Physa spp. snails from Chile and Argentina were collected for adults and larval schistosomatids, respectively. Isolated schistosomatids were preserved for morphological and molecular analyses (28S and COI genes). Four different schistosomatid taxa were retrieved from birds: Trichobilharzia sp. in N. peposaca and S. cyanoptera that formed a clade; S.cyanoptera and S. versicolor hosted Trichobilharzia querquedulae; Cygnus melancoryphus hosted the nasal schistosomatid, Nasusbilharzia melancorhypha; and one visceral, Schistosomatidae gen. sp., which formed a clade with furcocercariae from Argentina and Chile from previous work. Of the physid snails, only one from Argentina had schistosomatid furcocercariae that based on molecular analyses grouped with T. querquedulae. This study represents the first description of adult schistosomatids from Chile as well as the elucidation of the life cycles of N.melancorhypha and T. querquedulae in Chile and Neotropics, respectively. Without well-preserved adults, the putative new genus Schistosomatidae gen. sp. could not be described, but its life cycle involves Chilina spp. and C. melancoryphus. Scanning electron microscopy of T. querquedulae revealed additional, undescribed morphological traits, highlighting its diagnostic importance. Authors stress the need for additional surveys of avian schistosomatids from the Neotropics to better understand their evolutionary history.
摘要：
相对于众多关注哺乳动物血吸虫的研究，较少包括禽类血吸虫，特别是在南半球。这种情况正在发生变化，新热带的最新研究表明，特有分类群具有显着的多样性。为了促进这一努力，九只鸭子（紫翅目，S.versicolor,Nettapeposaca)，12只天鹅（天鹅座）和1,400个Physaspp。来自智利和阿根廷的蜗牛被收集用于成虫和幼虫血吸虫，分别。保存分离的血吸虫进行形态学和分子分析（28S和COI基因）。从鸟类中回收了四种不同的血吸虫类群：毛虫。在形成进化枝的蛇床子和蓝翅目中；蓝翅目和杂色毛虫寄养了毛虫；天鹅座托管了鼻血吸虫，黑血球；和一个内脏，血吸虫。sp.,从以前的工作中，它与来自阿根廷和智利的furcocer虫形成了进化枝。在生理蜗牛中，根据分子分析，只有来自阿根廷的一个人患有血吸虫草虫。这项研究代表了对智利成年血吸虫的首次描述，以及对智利和新热带的黑斑念珠菌和T.querquedulae的生命周期的阐明，分别。没有保存完好的成年人，假定的新血吸虫属。sp.无法描述，但它的生命周期涉及Chilinaspp。和C.melancoryphus.T.querquedulae的扫描电子显微镜显示，未描述的形态特征，强调其诊断的重要性。作者强调需要对新热带地区的禽血吸虫进行更多调查，以更好地了解其进化史。
