Museum of Natural History, University of Wrocaw, Sienkiewicza 21, 50-335 Wrocaw, Poland. .
Zootaxa. 2022 Jan 25;5093(1):1-37. doi: 10.11646/zootaxa.5093.1.1.
To date, twenty-seven valid species names in the Stenichnini genus Euconnus Thomson have been recognized in the fauna of Japan. The present paper summarizes the current knowledge of Japanese Euconnus, and for the first time properly illustrated redescriptions of E. debilis (Sharp), E. dulcis Sharp, E. fustiger (Sharp), E. impar Sharp, E. japonicus (Sharp), E. oscillans Sharp, and E. raucus Sharp are given, based on type specimens. Lectotypes are designated for Euconnus dulcis Sharp Euconnus lewisii Sharp, Euconnus impar Sharp, Euconnus schoenfeldti Reitter, Scydmaenus japonicus Sharp, and Scydmaenus debilis Sharp. Euconnus schoenfeldti Reitter syn. n. is placed as a junior synonym of E. fustiger (Sharp); E. ohnoensis Hoshina syn. n. is placed as a junior synonym of E. japonicus (Sharp); E. kusunokii Hoshina syn. n. and E. itsuki Hoshina syn. n. are placed as junior synonyms of E. takachihoi Hoshina; and E. hosakae Hoshina, Fukutomi Watanabe syn. n. is placed as a junior synonym of E. tsugaruensis Hoshina Arai. Placement of E. lewisii Sharp and E. miyawakianus Franz as junior synonyms of E. fustiger is confirmed. Euconnus iouzensis Hoshina Nakata, E. kojiroi Hoshina, E. kumejimensis Hoshina, E. miyatai Hoshina, E. sayaka Hoshina, E. sayo Hoshina, E. takachihoi Hoshina, E. touko Hoshina, E. unpini Hoshina, and E. yoshidai Hoshina have been inadequately or inaccurately described and require redescriptions to become identifiable. Status of some of these names (i.e., valid vs. possibly junior synonyms) may be difficult to clarify because the aedeagi of unique holotype males have been improperly prepared and strongly deformed. The current state of knowledge of Japanese Euconnus is discussed and it is concluded that status of many recently described species remains unclear and further work will be difficult because of inadequate descriptions and preparation methods.
迄今为止，在日本动物区系中已确认有 Stenichnini 属 Euconnus Thomson 的 27 个有效种名。本文总结了日本 Euconnus 的现有知识，并首次基于模式标本对 E. debilis (Sharp)、E. dulcis Sharp、E. fustiger (Sharp)、E. impar Sharp、E. japonicus (Sharp)、E. oscillans Sharp 和 E. raucus Sharp 进行了适当的重新描述。为 Euconnus dulcis Sharp、Euconnus lewisii Sharp、Euconnus impar Sharp、Euconnus schoenfeldti Reitter、Scydmaenus japonicus Sharp 和 Scydmaenus debilis Sharp 指定了模式标本。Euconnus schoenfeldti Reitter syn. n. 被归入 E. fustiger (Sharp)的同物异名；E. ohnoensis Hoshina syn. n. 被归入 E. japonicus (Sharp)的同物异名；E. kusunokii Hoshina syn. n. 和 E. itsuki Hoshina syn. n. 被归入 E. takachihoi Hoshina 的同物异名；E. hosakae Hoshina, Fukutomi Watanabe syn. n. 被归入 E. tsugaruensis Hoshina Arai 的同物异名。确认了 E. lewisii Sharp 和 E. miyawakianus Franz 作为 E. fustiger 的同物异名的地位。Euconnus iouzensis Hoshina Nakata、E. kojiroi Hoshina、E. kumejimensis Hoshina、E. miyatai Hoshina、E. sayaka Hoshina、E. sayo Hoshina、E. takachihoi Hoshina、E. touko Hoshina、E. unpini Hoshina 和 E. yoshidai Hoshina 的描述不充分或不准确，需要重新描述才能识别。由于独特的雄性阳茎标本的准备不当，强烈变形，这些名称中的一些（即有效名称与可能的同物异名）的状态可能难以澄清。本文讨论了日本 Euconnus 的现有知识状况，并得出结论，由于描述和准备方法不充分，许多最近描述的物种的状况仍不清楚，进一步的工作将很困难。
