Concha Francisco J, Caira Janine N, Ebert David A, Pompert Joost H W
Department of Ecology Evolutionary Biology, University of Connecticut, 75 North Eagleville Road, Unit 3043 Storrs, CT 06269 - 3043, USA Facultad de Ciencias del Mar y de Recursos Naturales, Universidad de Valparaíso, Av. Borgoño 16344, Viña del Mar, Chile.
Zootaxa. 2019 May 1;4590(5):zootaxa.4590.5.1. doi: 10.11646/zootaxa.4590.5.1.
Recent molecular evidence has called into question the identity of skates collected in the waters off the Falkland Islands previously identified as Zearaja chilensis. NADH2 sequence data indicate that these specimens are not conspecific with those currently referred to as Z. chilensis from Chile and, in fact, represent a novel cryptic species. This study aimed to investigate this hypothesis based on morphological comparisons of specimens from the coasts of both western and eastern South America. In total, 50 specimens from Chile and 41 specimens from the Falkland Islands were collected and examined; morphometric data were generated for a subset of specimens from both areas. NADH2 sequence data were generated for a total of 19 specimens from both areas, as well as specimens of Z. nasuta from New Zealand, D. pullopunctatus from South Africa, D. oxyrinchus from the Azores, Okamejei hollandi, and O. cairae from Borneo, and O. kenojei from Japan. Based on morphological and molecular analyses, Zearaja is synonymized with Dipturus and species assigned to the former genus are transferred to the latter genus. A neotype is designated for D. chilensis and this species is redescribed. Dipturus lamillai sp. nov. is described based on specimens from the Falkland Islands. Comparison of our NADH2 data with data for mitochondrial genomes generated from tissue samples taken from two specimens originally identified as Z. chilensis, indicate that, while the sample from Chile came from a specimen of D. chilensis, that from the skate steak obtained from a restaurant in Korea actually came from a specimen of D. lamillai sp. nov. This emphasizes the importance of confirming both the provenance and identity of specimens from which sequence data are generated and submitted to GenBank if misidentifications are to be avoided.
最近的分子证据对之前在福克兰群岛海域采集到的曾被鉴定为智利泽氏鳐（Zearaja chilensis）的鳐鱼身份提出了质疑。NADH2序列数据表明，这些样本与目前来自智利的被称为智利泽氏鳐的样本并非同种，实际上代表了一个新的隐存物种。本研究旨在基于对南美洲西部和东部海岸样本的形态学比较来调查这一假设。总共收集并检查了来自智利的50个样本和来自福克兰群岛的41个样本；为来自这两个地区的部分样本生成了形态测量数据。对来自这两个地区的总共19个样本以及来自新西兰的纳氏鳐（Z. nasuta）、来自南非的斑点鳐（D. pullopunctatus）、来自亚速尔群岛的尖吻鳐（D. oxyrinchus）、来自婆罗洲的霍氏尖犁头鳐（Okamejei hollandi）和凯氏尖犁头鳐（O. cairae）以及来自日本的日本尖犁头鳐（O. kenojei）的样本生成了NADH2序列数据。基于形态学和分子分析，泽氏鳐属（Zearaja）与油夷鳐属（Dipturus）同义，归入前一属的物种被转移到后一属。为智利油夷鳐（D. chilensis）指定了新模标本并对该物种进行了重新描述。基于来自福克兰群岛的样本描述了新物种拉氏油夷鳐（Dipturus lamillai sp. nov.）。将我们的NADH2数据与从最初鉴定为智利泽氏鳐的两个样本的组织样本中生成的线粒体基因组数据进行比较，结果表明，虽然来自智利的样本来自智利油夷鳐的一个标本，但从韩国一家餐馆获得的鳐鱼排样本实际上来自拉氏油夷鳐新物种的一个标本。这强调了如果要避免错误鉴定，确认用于生成序列数据并提交到GenBank的样本的来源和身份的重要性。
