Reference
Hans Fery, Gil Challet (2015): Hygrotus (Coelambus) nubilus (LECONTE, 1855) on Mauna Kea
(Hawaii) - first record of the genus from the Pacific
zoogeographical region (Coleoptera: Dytiscidae) – Linzer biologische Beiträge – 0047_2: 1303 - 1309.