Children (7 direct children, 10 direct and indirect children):
Hypomesus transpacificus
(tree size 1)
Delta smelt
Hypomesus nipponensis
Pond smelt
Hypomesus olidus
Hypomesus pretiosus
(tree size 2)
Hypomesus japonicus
Hypomesus sakhalinus
Hypomesus verecundus