Quetecsaurus rusconii schematic.

Another obscure and average-sized lognkosaur, recovered as the closest relative of Futalognkosaurus in the Carballido et al. matrix. Like Mendozasaurus, Quetecsaurus suffers from a heavy lack of skeletals (the one in the description paper, based on Alamosaurus, is more meant to be a schematic of uncovered material than an actual reconstruction), although, since it was discovered far more recently and lacks any remarkable qualities in either size or completeness, that is somewhat understandable. At least it's more complete than Puertasaurus.

Like with Mendozasaurus, the authors give no further placement for the cervical than ''middle-posterior''; I decided to depict it as a c13 because any other middle-posterior position would result in a disproportionately tiny neck, while the former turns up somewhat similar to Futalognkosaurus relative to the rest of the body (although the neural spine is not as impressive, making the neck outline shallower). The Lisandro Fm., where it was found, is rather lacking in dinosaurs, with the only named taxon being the ornithopod Anabisetia.

Credits for help with the making of this skeletal:
González-Riga (2014) for figures and measurements of preserved bones.
Gallina & Apesteguia (2011) for Bonitasaura skull profile.
 for Futalognkosaurus skeletal, which stood in for the missing vertebrae.

UPDATE 10/24/17: Added ribs, you're welcome Megalotitan .