part of has part microtubule ventral disc supernumerary microtubule array pr Due to the asymmetric nature of the Giardia trophozoite, this term is defined spatially as the trophozoite is viewed from the dorsal side, with the two nuclei dorsal to the ventral disc, and the ventral disc toward the anterior. supernumerary microtubule array A partial left-handed spiral array of microtubules that lies generally dorsal to the main ventral disc microtubule array in Giardia species (trophozoite stage). GO:0097596 2014-04-03T11:25:07Z cellular_component ventral disk supernumerary microtubule array ventral disc cellular anatomical structure