theropods, any member of the dinosaur subgroup Theropoda, which includes all the flesh-eating dinosaurs. Theropods were the most diverse group of saurischian (“lizard-hipped”) dinosaurs, ranging from the crow-sized Microraptor to the huge Tyrannosaurus rex, which weighed six tons or more.

Unlike the sauropod saurischians, all the theropods were obligate bipeds; that is, their hind legs provided support and locomotion while the short forelimbs and mobile hands were probably adapted for grasping and tearing prey. Despite the group’s name, which means “beast (i.e., mammal) foot,” theropod feet usually resembled those of birds. Birds are descended from one lineage of small theropods and therefore are members of Theropoda.

Three major theropod groups are generally recognized. Ceratosaurs were the first and ranged in size from the small Coelophysis to Ceratosaurus, which approached Allosaurus in size. Succeeding the early ceratosaurs were the tetanurans, comprising the carnosaurs (including Allosaurus) and the coelurosaurs (a larger group that includes Tyrannosaurus, dromaeosaurs, and Ornithomimus, among others). Coelurosaurs and carnosaurs both had many hollow bones and sharp, recurved teeth along the entire length of their jaws.

Theropod remains have been recovered from all continents except Antarctica and from the Middle Triassic through the Late Cretaceous Epoch (from 245 million to 65.5 million years ago). The earliest theropod is thought to be Eodromaeus, a 1.2-metre- (4-foot-) long dinosaur known from fossils discovered in northwestern Argentina that date to about 230 million years ago.

Dinosaurs VIII : Theropoda - Megalosauroidea and Carnosauria :bird-wat:

Megatheropods - "The Largest Killers To Walk The Earth"

The Most Accurate T. rex Ever Reconstructed? :bird-screm1:

Prehistoric Planet episode 1: Coasts :bird-screm-2:

The New Look of Spinosaurus :sicko-spin:

The Raptor That Made Us Rethink Dinosaurs :bird-mad:

2001 Walking With Dinosaurs The Ballad Of Big Al :comrade-birdie:

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  • Indifference_Engine [comrade/them, any]
    ·
    2 years ago

    So I've started reading Blackshirts and Reds recently and the other day I finally got to "The Quote" after seeing it posted for years and was unironically like :soypoint-1: :parenti: :soypoint-2:

    • gwysibo [they/them]
      ·
      2 years ago

      i just finished this book but i forgot what the quote was can you remind me

      • HoChiMaxh [he/him]
        ·
        2 years ago

        During the cold war, the anticommunist ideological framework could transform any data about existing communist societies into hostile evidence. If the Soviets refused to negotiate a point, they were intransigent and belligerent; if they appeared willing to make concessions, this was but a skillful ploy to put us off our guard. By opposing arms limitations, they would have demonstrated their aggressive intent; but when in fact they supported most armament treaties, it was because they were mendacious and manipulative. If the churches in the USSR were empty, this demonstrated that religion was suppressed; but if the churches were full, this meant the people were rejecting the regime's atheistic ideology. If the workers went on strike (as happened on infrequent occasions), this was evidence of their alienation from the collectivist system; if they didn't go on strike, this was because they were intimidated and lacked freedom. A scarcity of consumer goods demonstrated the failure of the economic system; an improvement in consumer supplies meant only that the leaders were attempting to placate a restive population and so maintain a firmer hold over them. If communists in the United States played an important role struggling for the rights of workers, the poor, African-Americans, women, and others, this was only their guileful way of gathering support among disfranchised groups and gaining power for themselves. How one gained power by fighting for the rights of powerless groups was never explained. What we are dealing with is a nonfalsifiable orthodoxy, so assiduously marketed by the ruling interests that it affected people across the entire political spectrum.