Children (36 direct children, 36 direct and indirect children):
Hydroginella angustata
Hydroginella bullata
Hydroginella gemella
Hydroginella musorstomi
Hydroginella richeri
Hydroginella rugosa
Hydroginella unica
Hydroginella vitiensis
Hydroginella galatea
Hydroginella marina
Hydroginella roselineae
Hydroginella scintilla
Hydroginella wareni
Hydroginella agulhasensis
Hydroginella caledonica
Hydroginella columnaria
Hydroginella dispersa
Hydroginella fascicula
Hydroginella mixta
Hydroginella superstes
Hydroginella tridentata
Hydroginella vincentiana
Hydroginella cypraeaformis
Hydroginella dedicata
Hydroginella delessertiana
Hydroginella dufresnei
Hydroginella guttula
Hydroginella limata
Hydroginella marionae
Hydroginella osteri
Hydroginella scintilla
Hydroginella sordida
Hydroginella chiapponii
Hydroginella dawnbrinkae
Hydroginella electrina
Hydroginella sterbai
Hydroginella tropica