Puertasaurus reuili rough sketch

Puertasaurus is a lognkosaur, closely related to Mendozasaurus and Futalognkosaurus. Recent phylogenies have suggested that lognkosaurs were more derived titanosaurs than recently thought, with sister-taxon relationships with Bonitasaura and Tapuiasaurus having been recently proposed. Mendozasaurus had osteoderms, and so the same may be true of its close relatives as well. 

Drawn in around 20 minutes in Krita, and based on Scott Hartman's skeletal of Puertasaurus, with osteoderm placement adapted from his skeletal of Malawisaurus and the skull of Tapuiasaurus based on Hechenleitner et al. 2015 .