Children (63 direct children, 63 direct and indirect children):
Physa acuta
Physella acuta
Banff springs snail
Physella johnsoni
Utah physa
Physella utahensis
Cave physa
Physella spelunca
Physella gyrina
Tadpole physa
Physella parkeri
Physella wrighti
Fish lake physa
Physella microstriata
Snake river physa snail
Snake river physa
Wet rock physa
Physella zionis
Physella humerosa
Physella mexicana
Physella bermudezi
Physella propinqua
Physella hendersoni
Physella hordacea
Physella globosa
Physella heterostropha
Physella traski
Physella cubensis
Physella squalida
Physella vinosa
Physella bottimeri
Physella boucardi
Physella conoidea
Physella magnalacustris
Physella osculans
Physella columbiana
Physella costata
Physella ancillaria
Physella virginea
Physella lordi
Physella sayi
Physella cooperi
Physella virgata
Physella integra
Physella winnipegensis
Physella ashmuni
Physella bayfieldensis
Physella bridgerensis
Physella carolinae
Physella chetekensis
Physella elegans
Physella harpa
Physella hemphilli
Physella humboldtiana
Physella jamaicensis
Physella lacustris
Physella laphami
Physella latchfordi
Physella microstoma
Physella moreleti
Physella obrussoides
Physella olive
Physella patzcuarensis
Physella pleromatis
Physella pomilia
Physella porteri
Physella solidissima
Physella sonomae
Physella traskii
Physella venustula
Physella wattsi