Møller Peter R, Jones W Joe
Zoological Museum, Natural History Museum, University of Copenhagen, Universitetsparken 15, DK-2100 Copenhagen East, Denmark.
Biol Bull. 2007 Feb;212(1):55-66. doi: 10.2307/25066580.
A single hagfish (Myxinidae, Eptatretus) specimen was recently captured at a hydrothermal vent site on the East Pacific Rise (38 degrees S). This is the first capture of a member of the jawless fishes (agnathans) from a hydrothermal vent site. The specimen differs from all congeners by the very slender body (depth 2.9% of total length), the paired and median ventral nasal sinus papillae, and the presence of 10 afferent branchial arteries on the medial ventral aorta. It is further unique because of a combination of the following features: slime pore counts; paired dorsal nasal sinus papillae; 12 gill pouches and gill apertures; posterior left side of body widely separated from pharyngocutaneous duct; 3/2 multicusp configuration; ventral aorta bifurcated anteriorly between 2nd and 3rd gill pouches (counted from the snout toward the heart); and pink coloration. The specimen is here described as a new species named Eptatretus strickrotti. Molecular 16S rRNA data places this new species as the basal-most species of Eptatretus, providing important new insight to the evolution of hagfishes as a whole.
最近在东太平洋海隆（南纬38度）的一个热液喷口处捕获了一条盲鳗（盲鳗科，艾氏盲鳗属）标本。这是首次从热液喷口处捕获无颌鱼类（盲鳗类）的成员。该标本与所有同属物种不同，其身体非常细长（深度为全长的2.9%），有成对的和位于腹面中间的鼻窦乳头，并且在腹面内侧主动脉上有10条传入鳃动脉。它还因其具有以下特征的组合而独特：黏液孔数量；成对的背鼻窦乳头；12个鳃囊和鳃孔；身体左侧后部与咽皮管广泛分离；3/2多尖结构；腹主动脉在第2和第3鳃囊之间（从吻部向心脏计数）前方分叉；以及粉红色。该标本在此被描述为一个新物种，命名为艾氏斯特罗特盲鳗。分子16S rRNA数据将这个新物种置于艾氏盲鳗属最基部的物种位置，为整个盲鳗的进化提供了重要的新见解。
