The name Mapusaurus is derived from the Mapuche word Mapu, meaning "of the Land" or "of the Earth" and the Greek sauros, meaning "lizard". Mapusaurus was a giant carnosaurian dinosaur from the Late Cretaceous of what is now Argentina. It was similar in size to its close relative Giganotosaurus, with the largest known specimens measuring over 12.2 meters (40 ft) in length and weighing over 3 tons.

Masiakasaurus was a small predatory (theropod) dinosaur from Madagascar that lived around 70 million years ago. Unlike most theropods, the front teeth of Masiakasaurus projected forward instead of straight down. This unique dentition suggests that Masiakasaurus had a specialized diet, perhaps including fish and other small prey. Other bones of the skeleton indicate that Masiakasaurus was bipedal, with much shorter forelimbs than hindlimbs. Masiakasaurus had an estimated adult body length of around 2 meters (about 6-7 feet).

Megalosaurus ("Great Lizard"') is a genus of large meat-eating theropod dinosaurs of the Middle Jurassic period (Bathonian) of Europe (Southern England, France, Portugal). It is significant as the first genus of dinosaur (outside of birds) to be described and named.

Metriacanthosaurus ("Moderate-spined lizard") is a genus of sinraptorid dinosaur from the mid-Jurassic Period of England. In 1923 German Paleontologist Friedrich von Huene wrote a paper on Jurassic and Cretaceous European carnivorous dinosaurs. In this paper, he examined a few specimens including an incomplete hip, a leg bone, and part of a backbone, and believed it was a new species of Megalosaurus.

Microraptor ("Small one who seizes") is a genus of small, dromaeosaurid dinosaur. About two dozen well-preserved fossil specimens have been recovered from Liaoning, China. They date from the early Cretaceous Jiufotang Formation (Barremian stage), 120-110 million years ago. Like Archaeopteryx, Microraptor provides important evidence about the evolutionary relationship between birds and dinosaurs. Microraptor had long pennaceous feathers that form wing-like surfaces on the arms and tail but also, surprisingly, on the legs. This led Xu (2003) to describe it as a "four winged dinosaur", and to speculate that it may have glided using all four limbs for lift.

Monolophosaurus ("One-crested lizard") was a carnosaur from Middle Jurassic (about 170 mya) China. It was named for the single crest on top of its skull. It could grow to be 5 meters (17 feet) long and 1.8 meters (6 feet) high. This dinosaur weighed up to 700 kilograms (1,500 pounds). The area that Monolophosaurus was found showed signs of water, so it is possible that this dinosaur lived on the shore of lakes or ocean. Monolophosaurus may be related to the allosaurids.

Mononykus ("One claw") was a theropod dinosaur from late Cretaceous Mongolia (80-70 million years ago) with long, skinny legs. It moved about on two legs, was very nimble, and could run at high speeds, something that would have been useful in the open desert plains where it lived. It had a small skull, and its teeth were small and pointed, suggesting that it ate insects and small animals, such as lizards and mammals. Large eyes allowed Mononykus to hunt by night, when it was cooler and there would have been fewer predators (such as Velociraptor) about.

Nanotyrannus ("Tiny tyrant") is a genus of tyrannosaurid dinosaur, and is possibly a juvenile specimen of Tyrannosaurus. The original Nanotyrannus specimen is estimated to have been around 17 feet (5.2 meters) long when it died. Robert Bakker has stated he believes Nanotyrannus hunted in packs. Teeth from multiple Nanotyrannus have been found in the bones of herbivorous dinosaurs.

Ornitholestes ("Bird robber") was a small theropod dinosaur of the late Jurassic of Western Laurasia (the area that was to become North America). To date, it is known only from a single partial skeleton, and badly crushed skull found at the Bone Cabin Quarry near Medicine Bow, Wyoming, in 1900. Ornitholestes was roughly 2 meters (6.5 ft) in length. The head of Ornitholestes was relatively small. Nonetheless, the skull was more robust than that of many other small theropods, such as Compsognathus and Coelophysis, and this would have enabled Ornitholestes to deliver a powerful bite.

Ornithomimus ("Bird mimic") is a genus of dinosaur from the Late Cretaceous Period of what is now North America. Ornithomimus was 12 ft (3.5 meters) long, 7 feet (2.10 meters) high and weighed around 100-150 kg. It was bipedal and superficially resembled an ostrich, except for its long tail. It would have been a swift runner.

Oviraptor is a genus of small Mongolian theropod dinosaur, first discovered by the legendary paleontologist Roy Chapman Andrews, and first described by Henry Fairfield Osborn, in 1924. Oviraptor lived in the late Cretaceous period, during the late Campanian stage about 75 million years ago and its name is Latin for "egg seizer", referring to the fact that the first fossil specimen was discovered atop a pile of what were thought to be Protoceratops eggs, and its specific name philoceratops means "lover of ceratopsians", also given as a result of this find. In his 1924 paper, Osborn explained that the name was given due to the close proximity of the skull of Oviraptor to the nest (it was separated from the eggs by only four inches of sand). However, Osborn also suggested that the name Oviraptor "may entirely mislead us as to its feeding habits and belie its character." In the 1990s, the discovery of nesting oviraptorids like Citipati proved that Osborn was correct in his caution regarding the name. These finds showed that the eggs in question probably belonged to Oviraptor itself, and that the specimen was actually brooding its eggs.

Pelecanimimus ("Pelican mimic") is a genus of primitive (basal) ornithomimosaur from the Early Cretaceous of Spain. It is notable for possessing more teeth than any other member of the Ornithomimosauria, most of which were toothless. Pelecanimimus was a small ornithomimosaur, at about 2-2.5 m long (6.5 - 8 ft). Its skull was unusually long and narrow, with a maximum length of about 4.5 times its maximum height. It was highly unusual among ornithomimosaurs in its large number of teeth: it had about 220 very small teeth in total.

Piatnitzkysaurus is the name given to a genus of megalosaurid dinosaur. Piatnitzkysaurus lived in the Middle Jurassic, in South America. It may or may not be related to Becklespinax. Partial skeletons have been found.

Proceratosaurus is a genus of medium-sized (around 3.7 meters) carnivorous theropod dinosaur from the Middle Jurassic (Bathonian) of England. It was originally thought to be an ancestor of Ceratosaurus, due to the similar small crest on its snout. Now, however, it is considered a coelurosaur, one of the earliest known. Proceratosaurus may have been related to the ancestors of later forms such as Ornitholestes and the tyrannosaurs.

Procompsognathus is a genus of small theropod dinosaur that lived during the Late Triassic Period, about 222 to 219 million years ago. Procompsognathus was named by Eberhard Fraas in 1913. He named the type species, P. triassicus, on the basis of a poorly-preserved skeleton found in Württemberg, Germany. Procompsognathus may have been about 1.2 meters long (4 ft). A biped, it had long hind legs, short arms, large clawed hands, a long slender snout with many small teeth, and a stiff tail. It lived in a relatively dry, inland environment and may have eaten insects, lizards, and other small prey.

Rajasaurus is known from a partial skeleton including a well–preserved skull (with a complete braincase and 70% of the rest of the skull bones recovered), parts of the backbone and tail, hip bones, and parts of the hind legs. Rajasaurus was an abelisaurid, a member of a group of predators known only from landmasses that were part of the former southern supercontinent Gondwana, such as Africa, India, Madagascar, and South America. Rajasaurus closely resembles Majungasaurus, a contemporary abelisaur from Madagascar, an island that had separated from the Indian landmass about 20 million years earlier. Rajasaurus measured about 7.6–9 m (24.9–29.5 ft) long, 2.4 m (7.9 ft) in height, and weighed about 3 to 4 tons. The skull was short, measuring 60 cm (23.6 in) in length, and bore a distinctive low rounded horn.

Rugops ("Wrinkle face") is a genus of theropod dinosaur which inhabited what is now Africa approximately 95 million years ago. At 7 - 9 m (24 - 30 ft) long and 2.5 m (8 ft) high at the hip, Rugops was a medium-sized carnivore. The skull bore armour or scales, and other bones had many blood vessels, causing Dr. Paul Sereno, who led the team that discovered the fossil, to say, "It's not the kind of head designed for fighting or bone-crushing", suggesting that it may have been a scavenger. The skull also bears two rows of seven holes each, of unknown purpose, although Sereno has speculated that they may have anchored some kind of crest or horns.