Mid-Cretaceous Argentina
Grouping: Macronaria/Titanosauria/basal titanosaur (?Argentinosauridae?)
Late Cretaceous Madagascar
Grouping: Macronaria/Titanosauria/Lithostrotia/Saltasauridae/Nemegtosaurinae
Late Cretaceous Argentina
Grouping: Macronaria/Titanosauria/Lithostrotia/Lithostrotia incertae sedis
Jobaria (by Stephen O'Connor)
Early Cretaceous north Africa (Sahara)
Grouping: Macronaria/late-surviving basal macronarian (perhaps a Camarasaurid)
Mamenchisaurus youngi (by Stephen O'Connor)
Middle Jurassic China
Grouping: Eusauropoda (or perhaps Neosauropoda)/Euhelopodidae (or Mamenchisauridae)
Early Cretaceous north Africa (Sahara)
Grouping: Macronaria/late-surviving basal macronarian (perhaps a Camarasaurid)
Middle Jurassic China
Grouping: Eusauropoda (or perhaps Neosauropoda)/Euhelopodidae (or Mamenchisauridae)

See if you can find Dicraeosaurus, Diplodocus, Haplocanthosaurus, Camarasaurus, Isisaurus, Omeisaurus, Brachiosaurus, and Saltasaurus.
Nenquensaurus (by Andrey Atuchin)
Late Cretaceous Argentina
Grouping: Macronaria/Titanosauria/Lithostrotia/Saltasauridae
Late Cretaceous Argentina
Grouping: Macronaria/Titanosauria/Lithostrotia/Saltasauridae
Late Jurassic Tanzania
Grouping: Macronaria/Titanosauria/basal titanosaur (or possibly Andesauridae)
Isisaurus (by Andrey Atuchin)
Early Cretaceous India
Grouping: Macronaria/Titanosauria/basal titanosaur
Diplodocus and hatchlings (by Mick Ellison)
Brachiosaurus altithorax (by Mark Hallett)
Late Jurassic Colorado & Wyoming, USA
Grouping: Macronaria/Brachiosauridae/Giraffatitanae
Futalognkosaurus dukei (by Julius T. Csotonyi)
Mid-Cretaceous Argentina
Grouping: Macronaria/Titanosauria/Lognkosauridae
Early Cretaceous India
Grouping: Macronaria/Titanosauria/basal titanosaur

Late Jurassic Colorado & Wyoming, USA
Grouping: Macronaria/Brachiosauridae/Giraffatitanae
Mid-Cretaceous Argentina
Grouping: Macronaria/Titanosauria/Lognkosauridae

(by Greg Paul - this is MOST of the full version)
Middle Jurassic China
Shunosaurus' grouping: Derived cetiosaurid/Transitional form

Late Jurassic Colorado & Wyoming, USA
Grouping: Diplodocoidea/Flagellicaudata/Diplodocidae/Apatosaurinae

Diplodocus herd fending off a river ambush by Allosaurus (by Greg Paul)
Late Jurassic Colorado & Wyoming, USA
Grouping: Diplodocoidea/Flagellicaudata/Diplodocidae/Diplodocinae
Late Jurassic Colorado & Wyoming, USA
Grouping: Diplodocoidea/Flagellicaudata/Diplodocidae/Diplodocinae

The Abelisaur Aucasaurus raids a titanosaur nest (by John Sibbick)
Mid-Cretaceous Argentina
Grouping: unknown - the sauropods here are just generic Patagonian titanosaurs.
Mid-Cretaceous Argentina
Grouping: unknown - the sauropods here are just generic Patagonian titanosaurs.

Chuanjiesaurus fends off Yangchuanosaurus (by Raul Martin)
Middle to Late Jurassic China
Conservative grouping: Eusauropoda/Mamenchisauridae
Radical grouping: Macronaria/Euhelopodidae/Mamenchisauridae (or perhaps somphospondyli?)
Middle to Late Jurassic China
Conservative grouping: Eusauropoda/Mamenchisauridae
Radical grouping: Macronaria/Euhelopodidae/Mamenchisauridae (or perhaps somphospondyli?)

Early Cretaceous Texas, USA
Grouping: Macronaria/Brachiosauridae/Pleurocoelinae

Late Jurassic Tanzania
Brachiosaurus grouping: Macronaria/Brachiosauridae/Giraffatitanae
Dicraeosaurus grouping: Diplodocoidea/Flagellicaudata/Dicraeosauridae

Diplodocus herd (by Raul Martin)