Classification:

Simplified cladogram of Macronaria after D'Emic (2012).

Macronaria
 

Camarasaurus

 
 
 

Tehuelchesaurus

 
Titanosauriformes
 

Brachiosauridae

 
Somphospondyli
 

Euhelopodidae

 
 

Chubutisaurus

 
 

Titanosauria

 
 
 
 
 

Source: en.wikipedia.org/wiki/Macronaria