Children (6 direct children, 10 direct and indirect children):
Japanese murrelet
Crested murrelet
Craveri's murrelet
Synthliboramphus craveri
Ancient murrelet
(tree size 2)
Synthliboramphus antiquus
Synthliboramphus hypoleucus
(tree size 2)
Guadalupe murrelet
Scripps's murrelet
Synthliboramphus scrippsi
Xantus's murrelet
Scripps's/guadalupe murrelet