First constructed in 2000, it was considered to include
Notosuchus,
Libycosuchus, and
Sebecosuchia. In a 2004
phylogenetic study, it was defined as the
most recent common ancestor of
Notosuchus,
Libycosuchus, and
Baurusuchoidea and all of its descendants. Ziphosuchia is often considered to be the
sister group of
Neosuchia, a clade that includes modern
crocodilians.
Razanandrongobe is the oldest representative of this clade. ==References==