A new species of Elassodiscus (Cottoidei: Liparidae) from the North Pacific with an emended diagnosis of the genus
A new species of Elassodiscus (Cottoidei: Liparidae) from the North Pacific with an emended diagnosis of the genus
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来自北太平洋的 Elassodiscus 新种（Cottoidei：Liparidae）及其属的修正诊断
DOI：
10.1007/s10228-020-00764-4
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发表时间：
2020
影响因子：
1.2
通讯作者：
Kamiunten M
中科院分区：
文献类型：
--
作者：
Kai Y;Matsuzaki K;Orr JW;Mori T;Kamiunten M
根据55个样本的遗传证据和形态测量学和分生分析，描述了一种新的蜗牛鱼，弹性蜗牛（Elassodiscus nyctereutes），以前与尾状蜗牛混淆。新物种与脚趾最相似。尾状鱼：有一个大大缩小的盆盘，两个鳃上孔，三叶状的牙齿，下叶有长胸鳍，直达肛门鳍的起源。然而，新物种与后者的明显区别在于拥有更多的椎骨（67-75比56-60），背鳍（59-69比51-54）和肛门鳍（52-63比45-50）。这两个物种主要分布在北太平洋：E。在日本北海道东部的劳苏附近的鄂霍次克海南部广为人知的夜蛾；堪察加和千岛群岛附近的太平洋；阿留申群岛；以及深度为362 - 1200米的白令海；whereasE。尾螺只产于北太平洋东部，从阿拉斯加湾东部到加利福尼亚，水深335-925米。我们还提供了一个修订的诊断属elassodiscus，以及一个关键的已知物种。
A new snailfish,Elassodiscus nyctereutes, previously confused withElassodiscus caudatus, is described on the basis of genetic evidence and morphometric and meristic analysis of 55 specimens. The new species is most similar toE. caudatusin having a greatly reduced pelvic disk, two suprabranchial pores, trilobed teeth, and long pectoral-fin rays in the lower lobe that reach to the anal-fin origin. However, the new species is clearly distinguished from the latter by having more vertebrae (67–75 vs. 56–60), dorsal- (59–69 vs. 51–54), and anal-fin rays (52–63 vs. 45–50). The two species are parapatrically distributed in the North Pacific:E. nyctereutesis widely known from the southern part of the Sea of Okhotsk, off Rausu, eastern Hokkaido, Japan; the Pacific Ocean off Kamchatka and the Kuril Islands; the Aleutian Islands; and the Bering Sea at depths of 362–1,200 m; whereasE. caudatusis only known from the eastern North Pacific, from the eastern Gulf of Alaska to California at depths of 335–925 m. We also provide an emended diagnosis of the genusElassodiscus, as well as a key to the known species.