Species within the genus
Williamia include: •
Williamia eximia (Nevill in G. & H. Nevill, 1869) •
Williamia gussoni Costa, 1829 •
Williamia krebsii (
Mörch, 1877) •
Williamia magellanica Dall, 1927 •
Williamia peltoides (
Carpenter, 1864) - shield false limpet •
Williamia radiata (Pease, 1860) •
Williamia radiata nutata Headley, 1908 •
Williamia subspiralis (Carpenter, 1864) Species brought into synonymy: •
Williamia galapagana Dall : synonym of
Williamia peltoides (Carpenter, 1864) •
Williamia gussonii (O. G. Costa, 1829): synonym of
Williamia gussoni (Costa O. G., 1829) •
Williamia japonica Habe, 1962: synonym of
Williamia radiata (Pease, 1860) •
Williamia kermadecensis (Iredale, 1912): synonym of
Williamia radiata (Pease, 1860) •
Williamia nutata (Headley, 1908): synonym of
Williamia radiata nutata (Headley, 1908) •
Williamia oblongata (Yokoyama, 1926): synonym of
Siphonacmea oblongata (Yokoyama, 1926) •
Williamia polynesica Rehder, 1980: synonym of
Williamia radiata (Pease, 1860) •
Williamia radiata Kuroda & Habe, in Habe, 1961: synonym of
Williamia radiata (Pease, 1860) •
Williamia tomlini (Robson, 1913): synonym of
Aporemodon tomlini Robson, 1913 ==References==