- I.Lea, 1874 Unio
infuscus I.Lea, 1872 Unio
insulsus I.Lea, 1857 Unio
irwinensis I.Lea, 1872 Unio
jejunus I.Lea, 1838 Unio
ligatus I.Lea, 1872 Unio mecklenbergensis...
- †Gomphogaleus
rodgersi Case, 1994 †Gondwanodus Daymond, 1999 †Gondwanodus
irwinensis Daymond, 1999 †Goodrichthys Moy-Thomas, 1951 †Goodrichthys eskdalensis...