New sauropod described today, Bajadasaurus, from the very early Cretaceous of Patagonia. It's a dicraeosaurid, the sister group to diplodocids.
The most distinctive feature is a set of
enormous forward-pointing neck spines, and
the study suggests that they were probably defensive structures, like an antelope's horns, rather than the heatsink/display/hump ideas that had previously been suggested for similar (but less extreme) spiny-necked close relative
Amargasaurus.
