At last! Some sauropods enter the LRT.

Overlooked no longer: the clade Sauropoda.
Learning about clade members now for the first time. Three have been added to the large reptile tree (LRT, 1291 taxa): Diplodocus, Camarasaurus and Brachiosaurus (Figs. 1, 4).

Note:
the antorbital fossa is absent in derived taxa.

Note 2:
The palate of sauropods shows an increasing space allotted to the internal nares. That makes sense given the increased volumes of air passing in and out of the nares of these increasingly gigantic dinosaurs — a volume that has to be several times the volume of the dead air in that long sauropod throat.

Other sauropod traits:

1. Fingers reduced to single phalanx stubs below semi-tubular metatarsals. Only digit 1 retains an ungual and tracks show it was retroverted, dorsal side down, saving the point, oriented medially to posteriorly (Fig. 4).
2. External nares dorsal with fragile to absent premaxillary ascending process (Fig. 1).

The LRT
divided dinosaurs into theropods and phytodinosaurs in 2011. Sauropodomorpha is a phytodinosaur clade, the sister clade of the clade Ornithischia (Fig. 5). Currently 5 taxa within the Phytodinosauria precede this split.

More
on each of these sauropods will come shortly.

References
Tschopp E, Wings O, Frauenfelder T, and Brinkmann W 2015. Articulated bone sets of manus and pedes of Camarasaurus (Sauropoda, Dinosauria). Palaeontologia Electronica 18.2.44A: 1-65.