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Subfamily Gyrininae

Dineutus discolor - male whirligig beetle - Dineutus species ? - Dineutus emarginatus or americanus?? - First PA Datapoint - Dineutus Gyrinus affinis Aube - Gyrinus affinis whirligig beetles  - Gyrinus Gyrinus pachysomus Gyrinidae? - Gyrinus 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.