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Subfamily Gyrininae

Dineutus sp. - Dineutus Dineutus sp - Dineutus assimilis Gyrinus  - Gyrinus dubius Whirligig Beetle - Dineutus nigrior Dineutus productus - male Del Puerto Canyon N29 - Gyrinus plicifer Male, Gyrinus? Maybe G. plicifer? - Gyrinus plicifer Dineutus discolor in Maryland - Dineutus discolor
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Adephaga
Family Gyrinidae (Whirligig Beetles)
Subfamily Gyrininae
Numbers
3 tribes, with 3 genera in our area and 12 genera worldwide(1)
Works Cited
1.Phylogeny and classification of whirligig beetles (Coleoptera: Gyrinidae): relaxed-clock model outperforms parsimony...
Miller K.B., Bergsten J. 2012. Systematic Entomology 37: 706–746.