巴西是一个热带国家,海洋栖息地非常多样化,拥有丰富多样的鱼类。这种鱼类多样性中只有一小部分被调查了寄生虫,因此,它们的吸虫寄生虫的多样性仍未被探索。此外,在巴西的184种已知的双生吸虫海鱼中,只有5种具有遗传特征。HemiuridaeLooss,1899年是巴西海洋鱼类中第二大特殊的吸虫家族,但是,在许多方面,它仍然是一个被忽视的群体。从里约热内卢附近的沿海地区收集了来自9种鱼类的43个吸虫标本,巴西。在属于8科(Carangidae,Clupeidae,Haemulidae,Muraenidae,Percophidae,Pinguipedidae,鞭科,和Triglidae)。使用形态和分子遗传分析研究了吸虫标本。来自四个属的总共八个半乳质物种,Etenurus,卵磷脂,Myosaccium,并确认了副半杂物。本文报道了四种半乳虫的新宿主记录,增加了一个物种地理分布的新记录,并提供了第一个DNA序列数据,并补充了五个物种的形态详细描述。系统发育分析支持,需要重新考虑完全基于形态特征的半尿科亚科分类,考虑到更广泛的信息来源。
Brazil is a tropical country with remarkably diverse marine habitats that harbour a rich diversity of fish. Only a small portion of this fish diversity has been investigated for parasites, and thus the diversity of their trematode parasites remains unexplored. Moreover, only 5 out of 184 known digenean trematode species of marine fish in Brazil have been genetically characterised. The Hemiuridae Looss, 1899 is the second most speciose trematode family in marine fishes from Brazil but, in many ways, it remains a neglected group. Forty-three trematode specimens from nine fish species were collected from the coastal zone off Rio de Janeiro, Brazil. Trematodes were found in the stomach of 14 specimens of 9 fish species belonging to 8 families (Carangidae, Clupeidae, Haemulidae, Muraenidae, Percophidae, Pinguipedidae, Trichiuridae, and Triglidae). Trematode specimens were studied using morphological and molecular genetic analyses. A total of eight hemiurid species from four genera, Ectenurus, Lecithochirium, Myosaccium, and Parahemiurus were identified. This paper reports on new host records for four species of hemiurids, adds a new record on the geographical distribution for one species, and provides the first DNA sequence data supplemented with the detailed description of morphology for five species. Phylogenetic analyses supported that the subfamily classifications of the Hemiuridae-based entirely on morphological characters-needs to be reconsidered, taking into account a wider range of information sources.