Sauropods of Maastrichtian North America

Whom'st've may or may not all be growth stages of Alamosaurus sanjuanensis. We can't really know. It's also kind of a spiritual sequel to my old ''Growing up with Alamosaurus'' way back in 2015 (which appears to have disappeared).

These don't represent every sauropod found from that time and place, of course; many specimens were just too similar in size (Lehman & Woodward describe over 25 specimens known from multiple bones, but most of their lengths differ by only a couple percent), too fragmentary (i.e. partial neural arches or metacarpals) or undescribed. Discoveries range throughout the southwestern US, including New Mexico, Utah (where it's known to have coexisted with Tyrannosaurus rex) and Texas.

Guest appearance by the largest and smallest known specimens of you-know-who, FMNH PR 2081 (Sue) and MOR 6625 (Chomper).

References:
's Alamosaurus skeletals
's FMNH PR 2081 skeletal
's MOR 6625 skeletal

-Lehman, T.M.; Coulson, A.B. (2002). "A juvenile specimen of the sauropod Alamosaurus sanjuanensis from the Upper Cretaceous of Big Bend National Park, Texas".
-Lehman, T.M.; Woodward, H.N. (2009). ''BONE HISTOLOGY AND MICROANATOMY OF ALAMOSAURUS SANJUANENSIS (SAUROPODA: TITANOSAURIA) FROM THE MAASTRICHTIAN OF BIG BEND NATIONAL PARK, TEXAS''.
-Fowler, D. W.; Sullivan, R. M. (2011). "The First Giant Titanosaurian Sauropod from the Upper Cretaceous of North America".
-Tykoski, R.S.; Fiorillo, A.R. (2016). "An articulated cervical series of Alamosaurus sanjuanensis Gilmore, 1922 (Dinosauria, Sauropoda) from Texas: new perspective on the relationships of North America's last giant sauropod".