Museum of Natural History, University of Wrocław, Sienkiewicza 21, 50-335 Wrocław, Poland..
Zootaxa. 2021 Jan 22;4915(3):zootaxa.4915.3.9. doi: 10.11646/zootaxa.4915.3.9.
Leptoplectus kijimunaa Jałoszyński Nomura, sp. n. is described, based on a series of specimens collected on Okinawa Island, Japan. Morphological structures of the new species are illustrated in detail and compared to known characters of all remaining 14 congeners. As the diagnosis of Leptoplectus remains unclear, character variability within known species is discussed. It is concluded that within Palaearctic region, the bilobed labrum is a reliable character to distinguish this genus from other Euplectini. The placement of Labroplectus Kurbatov, treated as incertae sedis within the tribe Trichonychini in the latest edition of the Catalogue of Palaearctic Coleoptera, is verified and it is concluded that it should be maintained in Euplectini. An identification key to genera of northeastern Asian Euplectini is given. We also comment on outdated and inaccurate morphological nomenclature still broadly used in descriptions of new Pselaphinae taxa.
Leptoplectus kijimunaa Jałoszyński Nomura, sp. n. 是基于在日本冲绳岛采集的一系列标本而描述的。新物种的形态结构被详细说明，并与所有已知的 14 个近缘种的特征进行了比较。由于 Leptoplectus 的诊断仍然不清楚，因此讨论了已知物种内的特征可变性。得出的结论是，在古北区，双叶状的上唇是区分该属与其他 Euplectini 的可靠特征。在最近版的《古北区鞘翅目昆虫目录》中，被视为 Trichonychini 族中地位不确定的 Labroplectus Kurbatov 得到了验证，并得出结论认为它应该保留在 Euplectini 中。给出了东北亚 Euplectini 属的鉴定钥匙。我们还对在新 Pselaphinae 分类群描述中仍广泛使用的过时和不准确的形态命名法发表了评论。
