Ochthebius hasegawai. 18 mentum (ventral aspect) 19 antennae (lateral aspect) 20 maxillary palpus (ventral aspect) 21 pronotum (dorsal aspect) 22 anterior part of elytron (dorsal aspect) 23 mesoventrite (ventral aspect) 24 metaventrite (ventral aspect) 25 male terminal sternite (ventral aspect).

 
 
  Part of: Lee D-H, Ahn K-J (2016) A taxonomic review of the Hydraenidae in South Korea (Coleoptera). ZooKeys 634: 57-78. https://doi.org/10.3897/zookeys.634.10640