Museum of Natural History, University of Wrocaw, Sienkiewicza 21, 50-335 Wrocaw, Poland. .
Zootaxa. 2022 Jan 25;5093(1):38-48. doi: 10.11646/zootaxa.5093.1.2.
Scydmaenus (Mascarensia) kasuganus Franz is the only nominal species of its subgenus known to occur in Japan. The only known specimen (holotype male) has been inadequately described, and later redescribed in an even more unfortunate way, after its fragile and unique aedeagus had been partly damaged. Therefore, the redescription that not only contains even less useful details than the original description but also illustrations of only a portion of the aedeagus (the one which is the least diversified among Scydmaenus species), only decreased chances to identify this interesting species correctly. Newly collected specimens, including males found on Mount Kasuga ad Nara, the type locality, made it possible to redescribe S. kasuganus properly. A checklist of world Mascarensia species is given, and diagnostic characters of this problematic subgenus are discussed.
Scydmaenus (Mascarensia) kasuganus Franz 是该亚属中唯一已知分布于日本的特有种。唯一已知的标本（模式雄虫）描述得不够充分，在其脆弱而独特的阳茎部分受损后，后来以一种更加不幸的方式重新进行了描述。因此，这次重新描述不仅包含的细节比原始描述更少，而且只展示了阳茎的一部分（在 Scydmaenus 属中最具多样性的部分），这使得正确识别这个有趣的物种的机会更小。在日本奈良县的春日山（模式产地）新采集到的标本，包括雄虫，使我们能够对 S. kasuganus 进行适当的重新描述。本文给出了世界范围内 Mascarensia 物种的清单，并讨论了这个有问题的亚属的鉴别特征。
