Hydradephaga

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: Hexapoda
Classis: Insecta
Cladus: Dicondylia
Subclassis: Pterygota
Cladus: Metapterygota
Infraclassis: Neoptera
Cladus: Eumetabola
Cladus: Endopterygota
Superordo: Coleopterida
Ordo: Coleoptera
Subordo: Adephaga
Clade(?): Hydradephaga
Superfamiliae: Dytiscoidea - Gyrinoidea - Haliploidea
References

Alarie, Y. 2016. Further contributions to the Hydradephaga (Coleoptera, Haliplidae, Gyrinidae and Dytiscidae) fauna of Prince Edward Island, Canada: new records, distributions and faunal composition. ZooKeys 600: 103–129. DOI: 10.3897/zookeys.600.8856. Reference page.
Alarie, Y. 2019. The Hydradephaga (Coleoptera, Haliplidae, Gyrinidae, and Dytiscidae) fauna of Cape Breton Island, Nova Scotia, Canada: new records, distributions, and faunal composition. ZooKeys, 897: 49–66. DOI: 10.3897/zookeys.897.46344 Open access Reference page.
Perissinotto, R., Bird, M. & Bilton, D.T. 2016. Predaceous water beetles (Coleoptera, Hydradephaga) of the Lake St Lucia system, South Africa: biodiversity, community ecology and conservation implications. ZooKeys 595: 85–135. DOI: 10.3897/zookeys.595.8614. Reference page.