Hello Jose:

For identification at species level you should contact  a specialist like Yves Alarie [email protected] in Canada. He is doing the revision of Gyretes spp. (Coleoptera: Gyrinidae)

https://www.jstor.org/stable/4009837?seq=1#page_scan_tab_contents

Regards,

Luis Miguel

Dear Luis,

Great,

Thanks for your help.

Regards,

José

I believe that Kelly Miller at the University of New Mexico ([email protected]) is working on South American Gyretes.