Although the majority of the species belonging to the genus Pseudocrangonyx Akatsuka & Komai, 1922 are found among the subterranean fauna of eastern Asia, the taxonomic knowledge is very poor and only four species have been recorded in Korea. In this study, the morphology of the stygobitic pseudocrangonyctid amphipods from Korean subterranean waters was examined and five new species were identified: Pseudocrangonyx concavussp. nov. has a characteristic emarginated posteroventral margin of epimeral plate 3; Pseudocrangonyx gracilipessp. nov. differs from other pseudocrangonyctids by the slender and elongated pereopods and more produced posterodistal corner of epimeral plate 3. Pseudocrangonyx crassussp. nov. shows the expanded peduncular articles and a reduced flagellum of antenna 2. Pseudocrangonyx minutussp. nov. is distinguished by more reduced pleopod articles compare to other pseudocrangonyctids. Pseudocrangonyx villosussp. nov. has the more setose bases of pereopods 3 and 4. Detailed descriptions and illustrations are presented for these five new species.

中文翻译：

---

来自韩国的5种新的假单胞菌属地下甲壳纲（甲壳纲，两栖类，假单胞菌科）

尽管在东亚的地下动物群中发现了属于Pseudocrangonyx Akatsuka＆Komai，1922属的大多数物种，但分类学知识非常薄弱，在韩国只记录了四种。在这项研究中，检查了来自韩国地下水域的sty虫伪c鱼两栖动物的形态，并鉴定了五个新种：伪s鱼。十一月 具有特征性的前外侧板3的后腹缘; Pseudocrangonyx gracilipessp。十一月 与其他假古兰科鱼类不同的是，其细长和变长的脚骨和上生殖板3的后发角较大。假单胞菌属crassussp。十一月 显示了扩大的小脑文章和减少的触角2鞭毛。Pseudocrangonyx minutussp。十一月 与其他伪古兰经相比，其优势在于减少了更多的百足类文章。Pseudocrangonyx villosussp。十一月 具有第3和第4脚架的更固定的基础。对这5个新物种进行了详细的描述和说明。