Delrieu-Trottin Erwan, Liggins Libby, Trnski Thomas, Williams Jeffrey T, Neglia Valentina, Rapu-Edmunds Cristian, Planes Serge, Saenz-Agudelo Pablo
Instituto de Ciencias Ambientales y Evolutivas, Universidad Austral de Chile, Valdivia, Chile Universidad Austral de Chile Valdivia Chile.
Institute of Natural and Mathematical Sciences, Massey University, Auckland, New Zealand Massey University Auckland New Zealand.
Zookeys. 2018 Dec 20(810):127-138. doi: 10.3897/zookeys.810.28887. eCollection 2018.
Rapa Nui, commonly known as Easter Island (Chile), is one of the most isolated tropical islands of the Pacific Ocean. The island location of Rapa Nui makes it the easternmost point of the geographic ranges for many western Pacific fish species that are restricted to the subtropical islands south of 20°S latitude. The blenniid fish species has been thought to have one of the most extensive geographic distribution ranges among these southern subtropical fish species, extending from the southern Great Barrier Reef to Rapa Nui. A phylogenetic analysis was conducted to determine the taxonomic status of the species. The results provide genetic evidence that suggests that this formerly South Pacific-wide species comprises at least three cryptic species with allopatric geographic distributions. The analyses reveal the geographic distributions of these clades and their genetic relationships with each other, and with other species within the genus . The processes that culminated in the current geographic distribution of this species complex and the zoogeographic implications of this finding for the South Pacific region are discussed.
拉帕努伊岛，通常被称为复活节岛（智利），是太平洋上最孤立的热带岛屿之一。拉帕努伊岛的地理位置使其成为许多西太平洋鱼类地理分布范围的最东端，这些鱼类仅限于南纬20°以南的亚热带岛屿。人们认为，鳚科鱼类在这些南亚热带鱼类中拥有最广泛的地理分布范围之一，从大堡礁南部一直延伸到拉帕努伊岛。进行了系统发育分析以确定该物种的分类地位。结果提供了遗传证据，表明这个以前分布在整个南太平洋的物种至少包括三个具有异域地理分布的隐存物种。分析揭示了这些进化枝的地理分布及其相互之间以及与该属内其他物种的遗传关系。本文讨论了导致该物种复合体当前地理分布的过程以及这一发现对南太平洋地区的动物地理学意义。
