Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
The New World whirligig beetles of the genus Dineutus Macleay, 1825 (Coleoptera, Gyrinidae, Gyrininae, Dineutini)
By Gustafson GT, Miller KB
Zookeys; 476: 1-135, 2015
Cite: 1035695 with citation markup [cite:1035695]

On page 13, the article give key to adult genera of Gyrinidae within the New World.
Maybe is good to be add this article on BG Info page for Family Gyrinidae, too.

all in due time
don't worry