Sentence:  <WSD>Maras</WSD> ("Dolichotis patagonum") are cursorial and prefer open areas with low vegetation for breeding and more barren sites for construction of communal dens (Taber and Macdonald 1992; Baldi 2007). 
Meaning of the word marked with <WSD> tags:  Any caviid rodent of genus "Dolichotis", common in the Patagonian steppes of Argentina.