PIE *-dn- > Latin -nd or -nn?

From: Joao S. Lopes
Message: 66150
Date: 2010-05-17

mundus < *mud-no-
fundus < *bHud-no-
unda < *ud-na

-tn- > *-nn-

annus < *at-no-
penna < *pet-na

JS Lopes