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A new species of Chromis damselfish from the tropical western Atlantic (Teleostei, Pomacentridae)
ZooKeys ( IF 1.3 ) Pub Date : 2020-12-31 , DOI: 10.3897/zookeys.1008.58805
Emily P McFarland 1, 2 , Carole C Baldwin 3 , David Ross Robertson 4 , Luiz A Rocha 5 , Luke Tornabene 1, 2
Affiliation  

Initially described in 1882, Chromis enchrysurus, the Yellowtail Reeffish, was redescribed in 1982 to account for an observed color morph that possesses a white tail instead of a yellow one, but morphological and geographic boundaries between the two color morphs were not well understood. Taking advantage of newly collected material from submersible studies of deep reefs and photographs from rebreather dives, this study sought to determine whether the white-tailed Chromis is actually a color morph of Chromis enchrysurus or a distinct species. Phylogenetic analyses of mitochondrial genes cytochrome b and cytochrome c oxidase subunit I separated Chromis enchrysurus and the white-tailed Chromis into two reciprocally monophyletic clades. A principal component analysis based on 27 morphological characters separated the two groups into clusters that correspond with caudal-fin coloration, which was either known or presumed based on the specimen’s collection site according to biogeographic data on species boundaries in the Greater Caribbean. Genetic, morphological, and biogeographic data all indicate that the white-tailed Chromis is a distinct species, herein described as Chromis vanbebberaesp. nov. The discovery of a new species within a conspicuous group such as damselfishes in a well-studied region of the world highlights the importance of deep-reef exploration in documenting undiscovered biodiversity.

中文翻译:

来自热带西大西洋的一种新种雀鲷(Teleostei,Pomacentridae)

最初于 1882 年描述的 Chromis enchrysurus,即黄尾鱼,在 1982 年被重新描述,以解释观察到的具有白色尾巴而不是黄色尾巴的颜色变体,但两种颜色变体之间的形态学和地理边界尚不清楚。利用从深海珊瑚礁潜水研究中新收集的材料和循环呼吸器潜水的照片,本研究试图确定白尾 Chromis 实际上是 Chromis enchrysurus 的颜色变体还是一个不同的物种。线粒体基因细胞色素 b 和细胞色素 c 氧化酶亚基 I 的系统发育分析将 Chromis enchrysurus 和白尾 Chromis 分成两个相互单系的进化枝。基于 27 个形态特征的主成分分析将这两组分为与尾鳍颜色相对应的集群,根据大加勒比地区物种边界的生物地理数据,根据标本的收集地点,这是已知的或推测的。遗传学、形态学和生物地理数据都表明,白尾鲟是一个独特的物种,在本文中被称为 Chromis vanbebberaesp。十一月 在世界上一个经过充分研究的地区在一个显眼的群体中发现了一个新物种,例如雀鲷,这突显了深海探索在记录未发现的生物多样性方面的重要性。根据大加勒比地区物种边界的生物地理数据,根据标本的收集地点,这是已知的或推测的。遗传学、形态学和生物地理数据都表明,白尾鲟是一个独特的物种,在本文中被称为 Chromis vanbebberaesp。十一月 在世界上一个经过充分研究的地区在一个显眼的群体中发现了一个新物种,例如雀鲷,这突显了深海探索在记录未发现的生物多样性方面的重要性。根据大加勒比地区物种边界的生物地理数据,根据标本的收集地点,这是已知的或推测的。遗传学、形态学和生物地理数据都表明,白尾鲟是一个独特的物种,在本文中被称为 Chromis vanbebberaesp。十一月 在世界上一个经过充分研究的地区在一个显眼的群体中发现了一个新物种,例如雀鲷,这突显了深海探索在记录未发现的生物多样性方面的重要性。
更新日期:2020-12-31
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