Walovich Kristin A, Ebert David A, Kemper Jenny M
Pacific Shark Research Center, Moss Landing Marine Laboratories, 8272 Moss Landing Road, Moss Landing, California 95039, USA..
Zootaxa. 2017 Jan 30;4226(4):zootaxa.4226.4.4. doi: 10.11646/zootaxa.4226.4.4.
A new species of chimaerid, Hydrolagus erithacus sp. nov., is described from nine specimens collected from the southeast Atlantic and southwest Indian oceans from depths of 470-1,000 meters. This species is distinguished from all other Hydrolagus species based on the following characteristics: head bulky, relatively large, followed by stocky body; head and body height from about pectoral fin origin to pelvic fin origin similar, then tapering rapidly to filamentous tail; first dorsal fin spine height about equal to, or slightly less than first dorsal fin apex height; second dorsal fin up to 81% of total body length and uniform in height; trifurcate claspers forked for approximately 20% of total length; robust frontal tenaculum nearly uniform in width, prepelvic tenaculae with five to seven medial spines, and a uniform black coloration with robust, non-deciduous skin. Comparison of mitochondrial NADH2 gene sequences with other morphologically similar Hydrolagus species suggests that H. erithacus is a distinct species.
一种新的银鲛物种，即艾氏水珍鱼（Hydrolagus erithacus sp. nov.），是根据从东南大西洋和西南印度洋470 - 1000米深处采集的9个标本描述的。该物种与所有其他水珍鱼物种的区别基于以下特征：头部粗壮、相对较大，其后是短粗的身体；从胸鳍起点到腹鳍起点的头部和身体高度相似，然后迅速变细至丝状尾部；第一背鳍棘高度约等于或略小于第一背鳍顶端高度；第二背鳍长达体长的81%且高度均匀；三叉形交合突分叉约占总长度的20%；粗壮的额交合刺宽度几乎均匀，骨盆前交合刺有五到七根内侧刺，以及具有粗壮、不脱落皮肤的均匀黑色体色。将线粒体NADH2基因序列与其他形态相似的水珍鱼物种进行比较表明，艾氏水珍鱼是一个独特的物种。
