"Odonata" . "Coenagrionidae" . . . . "Insecta" . "Enallagma praevarum (Hagen 1861)" . . . "Animalia" . . "Arroyo Bluet" . . . . "Enallagma" . "(Hagen 1861)" . "Arthropoda" . "Enallagma praevarum" . . . . . . . . .