Mesoclisis in the imperative: Phonology, morphology or syntax?

Mesoclisis in the imperative and parasitic plurals in Spanish are currently accounted for either at Morphological Structure (Halle and Marantz, 1994) or at the PF interface (Harris and Halle, 2005). In previous work (Manzini and Savoia, 1999, 2004a,b, 2005, 2007, 2008a,b) we argued that these and similar phenomena in both Romance and Albanian are best accounted for at the syntactic level. Since sub-word constituency is involved, this amounts to saying that syntax subsumes morphology. Here we defend the conclusions of our previous work against available alternatives, on the basis of a strictly lexicalist stance on the projection of morphosyntactic structures from the lexicon.