Phytosaurs are archosaurs from the Triassic,
rivals of the crocodilians? ancestors. They resemble crocodilians, but
the nostrils are
set on a volcano-shaped bump between the
eyes rather than on
the end of the snout. Phytosaurs may be
treated as crocodilians;
many are specialized fish-eaters, but
they lack the other crocodilian subtypes and they never exceed 7 HD.