Children (22 direct children, 69 direct and indirect children):
Hydrachna globosa
(tree size 6)
Hydrachna miliaria
Hydrachna leegei
(tree size 2)
Hydrachna rotunda
Hydrachna mystomirabilis
Hydrachna microscutata
Hydrachna magniscutata
Hydrachna hungerfordi
Hydrachna crenulata
Hydrachna marshallae
Hydrachna cruenta
Hydrachna canadensis
Hydrachna geographica
Hydrachna hutchinsoni
Hydrachna baculoscutata
Hydrachna hesperia
Hydrachna conjecta
Hydrachna stipata
Anohydrachna
(tree size 3)
Diplohydrachna
(tree size 8)
Hydrachna
(tree size 6)
Rhabdohydrachna
(tree size 22)