ValdÉs Ángel, Lundsten Lonny, Wilson Nerida G
Department of Biological Sciences, California State Polytechnic University, 3801 West Temple Ave., Pomona, California, USA.
Zootaxa. 2018 Dec 3;4526(4):401-433. doi: 10.11646/zootaxa.4526.4.1.
Increased exploration of northeastern Pacific deep-sea habitats has revealed a diverse and often poorly-known invertebrate community, including a number of undescribed species of nudibranchs studied herein. We used morphology to distinguish several new species from their congeners, and generated data where possible for mitochondrial (COI, 16S) and nuclear markers (H3) to place them in a phylogenetic context. We described here Tritonia nigritigris sp. nov., Dendronotus claguei sp. nov., Ziminella vrijenhoeki sp. nov., Cuthona methana sp. nov., Aeolidia libitinaria sp. nov. and redescribed Zeusia herculea (Bergh, 1894). Another species of Tritonia is described but not named due to the absence of reproductive system information. Although there are difficulties in collection from deep-sea habitats, only two of our new species are known from single specimens. As with many other deep-sea regions, we expect the number of new species from this region to increase with further exploration. Because the deep regions of the northeast Pacific are particularly vulnerable to the effects of decreasing oxygenation due to climate change, we consider that documenting this fauna has some level of urgency.
对东北太平洋深海栖息地的更多探索揭示了一个多样且通常鲜为人知的无脊椎动物群落，包括本文研究的一些未描述的裸鳃类物种。我们利用形态学将几个新物种与其同属物种区分开来，并尽可能生成线粒体（COI、16S）和核标记（H3）的数据，以便将它们置于系统发育背景中。我们在此描述了黑纹三列鳃海牛新种（Tritonia nigritigris sp. nov.）、克拉格树枝鳃海牛新种（Dendronotus claguei sp. nov.）、弗里耶霍克氏紫拟海牛新种（Ziminella vrijenhoeki sp. nov.）、甲烷库托海牛新种（Cuthona methana sp. nov.）、葬礼艾氏海牛新种（Aeolidia libitinaria sp. nov.），并重新描述了大力士泽氏海牛（Zeusia herculea (Bergh, 1894)）。描述了另一种三列鳃海牛，但由于缺乏生殖系统信息未命名。尽管从深海栖息地采集存在困难，但我们的新物种中只有两个是从单个标本得知的。与许多其他深海区域一样，我们预计随着进一步探索，该区域的新物种数量将会增加。由于东北太平洋的深海区域特别容易受到气候变化导致的氧合作用下降的影响，我们认为记录这一动物群落具有一定程度的紧迫性。
