Subgenera Cladoconnus Reitter and Tetramelus Motschulsky of Euconnus Thomson discovered in China (Coleoptera, Staphylinidae, Scydmaeninae) Author Jałoszyński, Paweł text Zootaxa 2024 2024-09-27 5514 3 232 256 http://dx.doi.org/10.11646/zootaxa.5514.3.2 journal article 10.11646/zootaxa.5514.3.2 1175-5326 13849780 E047925A-2056-444B-9467-122F66BE9BE2 Genus Euconnus Thomson Euconnus Thomson, 1859: 61 . Type species: Pselaphus hirticollis Illiger, 1798 (des. orig.). Remarks. The subgeneric system of Euconnus was a subject of a long series of publications ( Jałoszyński 2012 , 2013b , 2015a , b, c, 2016a, b, c, d, 2017a, b, c, d, e, f, 2018a, b, 2019a, 2020a, b, 2021a, b, 2022b, Jałoszyński & Newton 2017 ). Many taxonomic issues have been solved, but the current subgeneric division of Euconnus is not phylogeny-based and certainly will require profound changes. Euconnus is characterized by the following set of features: eyes (if present) situated closer to mandibular bases and antennal fossae than to occipital constriction; lateral submental sutures lacking; mesoventral intercoxal process present, carinate; notosternal sutures complete; hypomeral ridges at least partly developed or at least inner regions of hypomera delimited from outer regions by abrupt change in microsculpture; each elytron with two asetose basal pits (reduced in some species); metaventral intercoxal process widely or narrowly (but clearly) separating metacoxae; and aedeagus with free rod-like parameres. Euconnus can be identified using a preliminary key (and comments related to the yet unclear diagnosis) to world Stenichnini genera published recently ( Jałoszyński 2024 ).