15–17, 19–22 Gyrinus japonicus 18 G. gestori 15 head (dorsal aspect) 16 pronotum (dorsal aspect) 17 apical part of elytron (dorsal aspect) 18 prosternum (ventral aspect) 19 metaventrite (ventral aspect) 20 tergite VIII (dorsal aspect) 21 sternites IV–VII (ventral aspect) 22 sternite VIII (ventral aspect).

  
 
  Part of: Lee D-H, Ahn K-J (2015) A taxonomic review of the Gyrinidae (Coleoptera) in Korea. ZooKeys 509: 87-107. https://doi.org/10.3897/zookeys.509.9442