Children (22 direct children, 22 direct and indirect children):
Microdrillia comatotropsis
Microdrillia circumvertens
Microdrillia commentica
Microdrillia crispata
Microdrillia difficilis
Microdrillia dinos
Microdrillia niponica
Microdrillia optima
Microdrillia patricia
Microdrillia sagamiensis
Microdrillia sansibarica
Microdrillia stephensensis
Microdrillia trina
Microdrillia triporcata
Microdrillia zeuxippe
Microdrillia fastosa
Microdrillia pakaurangia
Microdrillia rhomboidales
Microdrillia aturensis
Microdrillia loprestiana
Microdrillia meyeri
Microdrillia pruina