ABSTRACT Four new species of the family Pseudocrangonyctidae from the Russian Far East are described and illustrated – Pseudocrangonyx spangsbergi sp. nov. and P. setosus sp. nov., both in Sakhalinskaya Oblast; P. myaochanicus sp. nov., in Khabarovsky Kray; and P. borealis sp. nov., in Magadanskaya Oblast. The affinities of the new species are discussed. New morphological data and DNA barcode data are also provided for Pseudocrangonyx camtschaticus Birstein, 1955, from a population adjacent to the type locality. The overall morphology of the genus Pseudocrangonyx was revisited using scanning electron microscopy, which revealed cellular (hexagonal) cuticular microsculpture of the body surface. The species diversity and geographic distribution of the East Asian stygobiotic pseudocrangonyctid amphipods are briefly reviewed. An identification key to the genus Pseudocrangonyx, with 31 species, is provided. http://www.zoobank.org/urn:lsid:zoobank.org:pub:EB2A6400-0333-496B-8345-68C1ECEF06A4

中文翻译：

---

地下片脚类 Pseudocrangonyx Akatsuka 和 Komai（甲壳纲：Pseudocrangonyctidae）的新种和记录，代表该组最北端的分布

摘要描述和说明了来自俄罗斯远东地区的 Pseudocrangonyctidae 科的四个新物种——Pseudocrangonyx spangsbergi sp。十一月 和 P. setosus sp。11 月，都在萨哈林州；P. myaochanicus sp. 十一月，在哈巴罗夫斯基边疆区；和 P.borealis sp。11 月，在马加丹州。讨论了新物种的亲和力。还为 Pseudocrangonyx camtschaticus Birstein, 1955 提供了新的形态学数据和 DNA 条形码数据，该数据来自与该类型所在地相邻的种群。使用扫描电子显微镜重新审视了 Pseudocrangonyx 属的整体形态，揭示了身体表面的细胞（六边形）表皮微雕。简要回顾了东亚短须螟的物种多样性和地理分布。提供了 Pseudocrangonyx 属的鉴定密钥，共有 31 个物种。http://www.zoobank.org/urn:lsid:zoobank.org:pub:EB2A6400-0333-496B-8345-68C1ECEF06A4