Theropoda 

The Theropoda is the most diverse suborder of Dinosaurs. It includes everything from Giganotosaurus carolinii, the largest land predator, to Vultur gryphus, the Andean condor. Like other suborders, Theropoda is split into multiple infraorders and clades (See below).

Information

Range

Theropods have been found on every continent, including Antarctica. Theropods were the first Dinosaurs, and existed until the end of the Cretaceous.

Size

Theropods range in size from possible 15m+ (50 ft) long Spinosaurus aegypticus to the Bee Hummingbird (Mellisuga helenae) at 5cm (2 in). The smallest non-avian Theropod was Microraptor, at 60cm (2 ft). Most non-avian Theropods fell into the 6m (20 ft) to 3m (10 ft) range.

Habits

Most non-avian Theropods were meat-eaters. In the Cretaceous a few groups of plant-eating and omnivorous Theropods evolved. This was taken to the extreme in the Therizinosauroidea, which evolved a huge gut for digesting and a small head, no longer needed to help kill other animals.

Classification

Suborder Theropoda

     Agnosphitys

     Chindesaurus

     Guaibasaurus

     Infraorder Ceratosauria

          Family Ceratosauridae

          Superfamily Abelisauroidea

               Deltadromeus

          Superfamily Coelophysoidea

     Clade Tetanurae

          Superfamily Spinosauroidea

          Infraorder Carnosauria

               Superfamily Allosauroidea

          Clade Coelurosauria

               Family Coeluridae

               Family Compsognathidae

               Superfamily Tyrannosauroidea

                    Albertosaurus

               Infraorder Ornithomimosauria

               Clade Maniraptora

                    Family Scansoriopterygidae

                    Superfamily Therizinosauroidea

                    Infraorder Deinonychosauria

                         Family Dromaeosauridae

                              Deinonychus

                         Family Troodontidae

                    Infraorder Oviraptorosauria

(From Wikipedia)