Chostonectes
Chostonectes is a genus of beetles in the family Dytiscidae, containing the following species:
Chostonectes gigas
Chostonectes johnsonii
Chostonectes maai Balke, 1995
Chostonectes nebulosus
Chostonectes sharpi Sharp, 1882
Chostonectes wattsi... Wikipedia