Shepherd Bart, Phelps Tyler, Pinheiro Hudson T, Pérez-Matus Alejandro, Rocha Luiz A
California Academy of Sciences, San Francisco, CA 94118 USA California Academy of Sciences San Francisco United States of America.
Subtidal Ecology Laboratory, Estación Costera de Investigaciones Marinas, Facultad de Ciencias Biologicas, Pontificia Universidad Católica de Chile, Santiago, Chile Pontificia Universidad Católica de Chile Santiago Chile.
Zookeys. 2018 May 31;762:105-116. doi: 10.3897/zookeys.762.24618. eCollection 2018.
A new species of the perchlet genus is herein described from a single specimen found at Rapa Nui (Easter Island) in the South Pacific. sp. n. was collected at a depth of 83 m in a mesophotic coral ecosystem at Rapa Nui. The main difference between and other members of the genus is higher fin-ray counts (X, 18 dorsal; 18 pectoral) and its distinctive coloration. Compared to the three other known eastern South Pacific species, has more dorsal-fin rays, more pectoral-fin rays, fewer tubed lateral-line scales, fewer gill rakers, a longer head relative to SL, a very short first dorsal spine relative to SL, and a short third anal spine relative to SL. is distinguished from western Pacific species, by having more dorsal- and pectoral-fin rays. The closest relative based on genetic divergence (with 12.3% uncorrected divergence in the mitochondrial COI gene) is , a widely distributed species, suggesting important links between Rapa Nui and western Pacific islands. This new species adds to the high endemism of the Rapa Nui ichthyofauna, and is further evidence of the importance of mesophotic reefs as unique communities.
本文根据在南太平洋拉帕努伊岛（复活节岛）发现的一个标本描述了鲈雀鲷属的一个新物种。新物种在拉帕努伊岛的一个中光层珊瑚生态系统中，于83米深处采集到。该新物种与鲈雀鲷属其他成员的主要区别在于鳍条数量更多（背鳍X，18根；胸鳍18根）及其独特的体色。与南太平洋东部其他已知的三个物种相比，该新物种背鳍鳍条更多、胸鳍鳍条更多、侧线管鳞更少、鳃耙更少、相对于标准体长头部更长、相对于标准体长第一背棘非常短、相对于标准体长第三臀棘短。该新物种与西太平洋物种的区别在于背鳍和胸鳍鳍条更多。基于遗传差异（线粒体COI基因未校正差异为12.3%），其最亲近的亲属是一个广泛分布的物种，这表明拉帕努伊岛与西太平洋岛屿之间存在重要联系。这个新物种增加了拉帕努伊岛鱼类区系的高度特有性，进一步证明了中光层珊瑚礁作为独特群落的重要性。
