Children (9 direct children, 9 direct and indirect children):
Eucalycoceras pentagonus
Eucalycoceras templetonense
Eucalycoceras denizoti
Eucalycoceras underwoodi
Eucalycoceras collignoni
Eucalycoceras indianense
Eucalycoceras dentonense
Eucalycoceras gothicum
Eucalycoceras lewisvillense