Children (15 direct children, 15 direct and indirect children):
Ptychostomella papillata
Ptychostomella brachycephalus
Ptychostomella tyrrhenica
Ptychostomella ommatophora
Ptychostomella higginsi
Ptychostomella bergensis
Ptychostomella lepidota
Ptychostomella brachycephala
Ptychostomella orientalis
Ptychostomella pectinata
Ptychostomella mediterranea
Ptychostomella helena
Ptychostomella helana
Ptychostomella jejuensis
Ptychostomella lamelliphora