Reference
Gil Challet, Hans Fery (2020): Rediscovery of Hygrotus (Leptolambus) artus (FALL, 1919), description of Hygrotus (L.) yellowstone nov.sp. and notes on other species of the genus (Coleoptera, Dytiscidae, Hydroporinae, Hygrotini) – Linzer biologische Beiträge – 0052_1: 37 - 79.