Abstract

A new species, Eustomias mikhailini sp. nova, close to E. macrura was described. It is proposed to restore the Urostomias subgenus from the synonymy of the Spilostomias subgenus. An identification key for the subgenera of the genus Eustomias with a high number of rays of the pectoral fin and for the species of the subgenus Urostomias is presented. A specimen of Eustomias gr. melanostigma, which combines the features of different species of this group in its structure of the chin barbel, was described, which raises doubts about the validity of the isolation of E. melanonema and E. melanostigmoides. New occurrences of rare Leptostomias cf. bilobatus and Photonectes xenopogon species, first discovered in the southeastern Pacific Ocean, were reported; detailed morphological descriptions of specimens are given; the limits of variability of diagnostically valuable characters are specified.

中文翻译：

---

关于一些鲜有的桔梗新科描述的黑腹科

摘要

一个新种，Eustomias mikhailini sp。新星，接近大肠杆菌。提议恢复Urostomias从的同义亚属Spilostomias亚属。对于属的亚属的识别密钥Eustomias具有大量胸鳍的光线和用于亚属的物种Urostomias被呈现。洋桔梗的标本。描述了黑变种，它在下巴结构中结合了这一类的不同物种的特征，这使人们对分离黑变种和黑变种的有效性产生怀疑。E. melanostigmoides。新出现的罕见Leptostomias cf. bilobatus和Photonectes xenopogon品种，在东南太平洋首次发现，据报道，给出了标本的详细形态描述；规定了具有诊断价值的字符的可变性限制。