Classification:

Dinheirosaurus is not extremely well known, and as a consequence, its phylogenetic position is not certain. In 2012 during a redescription of the taxon by Philip Mannion et al., it was recovered, in both cladograms, to be sister species to Supersaurus vivianae and together forming the most basal diplodocines. A 2012 cladogram, published by Mannion et al. and using a modified matrix of Whitlock (2011) found that Dinheirosaurus was more primitive than Torneria and more derived than Apatosaurus.[3] However, a cladogram from 2014 found that their group was supported, but in fact more primitive than Apatosaurus, and therefore outside Diplodocinae.[7] In 2015, Dinheirosaurus lourinhanensis was considered a species of Supersaurus in a new combination S. lourinhanensis. Their results are shown below.[1]
 
Diplodocidae
 

Amphicoelias altus

 
 
 
Apatosaurinae
 

Unnamed species

 
 
 
 

Apatosaurus ajax

 
 

Apatosaurus louisae

 
 
 
 

Brontosaurus excelsus

 
 
 

Brontosaurus yahnahpin

 
 

Brontosaurus parvus

 
 
 
 
 
 
Diplodocinae
 

Unnamed species

 
 
 

Tornieria africana

 
 
 
 

Supersaurus (=Dinheirosaurus) lourinhanensis

 
 

Supersaurus vivianae

 
 
 
 

Leinkupal laticauda

 
 
 

Galeamopus hayi

 
 
 
 

Diplodocus carnegii

 
 

Diplodocus hallorum

 
 
 
 

Kaatedocus siberi

 
 

Barosaurus lentus

 

Source: en.wikipedia.org/wiki/Dinheirosaurus