Fischer & Crosse, 1894 – Central America
Disconaias discus (Lea, 1838)
INHS 21704. Moctezuma River, Mexico.
Type Species: Unio discus Lea, 1838
Remarks: The date on this genus needs to be verified as I have seen Crosse & Fischer, 1893 also used [KSC 3/99].