* AccidentallyCorrectZoology: Almost exclusively the novel, but Brosnan turned out to be on the ball several times.
** Sometime after the novel was written, ''Scolosaurus'' became synonymous with ''Euoplocephalus''. But then in 2013, ''Scolosaurus'' turned out to be its own valid genus after all. However, it is portrayed with a two-spiked club on its tail, so it sort of cancels out.
** The novel describing the ''Tarbosaurus'' feed in a method very similar to a bird, by pinning the food down with its foot and pulling strips of meat off with its front teeth in place of a beak actually lines up very nicely with 2010s hypotheses about how large theropods ate.
** Depicting the ''Deinonychus'' as able to climb effectively was widely considered inaccurate in the 1980s by all but a few researchers. More recent evidence in the 2000s onwards indicate all but the absolute heaviest dromaeosaurids were actually very good climbers and juvenile ''Deinonychus'' might have been heavily arboreal to avoid predators with even the adults still able to climb effectively.
** There is one case of this in the film. A brief shot of the ''Deinonychus'' as a hatchling shows it with feathers, although when it becomes an adult it is scaly. This was presumably done [[ViewersAreMorons to emphasize that]] the dinosaurs were made from chicken DNA (and indeed, just to drive the point home, it's shown hatching inside a truck full of chickens). Nowadays, of course, it's generally agreed that ''Deinonychus'' and other small predatory dinosaurs had feathers naturally.
** ''Carnosaur'''s method of reviving dinosaurs (altering the germ cell DNA of chickens so that they produce eggs with dinosaur embryos in them) is much more realistic than the method portrayed in ''Franchise/JurassicPark'' (somatic cell cloning, where the artificially fertilized egg cell is implanted into a vacant uterus). Whether or not the author actually knew at the time is unclear, but it's now known the latter method is basically impossible for animals with shelled eggs. In mammals, cloning is relatively simple, since the egg cell automatically implants itself into the womb's wall, but animals that lay eggs can't do this, and it's even harder to implant the embryo into the amniotic sac without damaging the eggshell. Meanwhile the former method is theoretically doable and has been seriously considered for reviving extinct bird species.
* DeletedScenes: Many scenes from the first movie had to be cut down across production due to the budget being diminished as much as it was.
** A scene of the ''Tyrannosaurus'' destroying an airplane was cut out entirely from the climax.
** A pterodactyl prop was made for the film to be used in an ending scene showing some of Tiptree's creatures survived and will spread, carrying the virus with them in a DownerEnding. The prop later found its way into other productions.
** A scene of the ''Deinonychus'' breaking into a home and slaughtering a family, similar to a sequence from the novel, was also cut out. While unconfirmed, this likely was to be the Sheriff's family and, if true, would explain his lack of shock seeing the dinosaur later alongside him angrily calling it out to face him.
** A subplot, mentioned by some crew members involved in the script, of something "much more sinister" and worse than the dinosaurs was also cut out or altered. Whether this was in reference to the virus or the dinosaurs having some human DNA, both of which are still in the film but the latter is hardly touched upon; is unknown.
* DisownedAdaptation: Brosnan didn't care for the film adaptation and especially disliked the portrayal of the dinosaurs, including comparing it unfavorably with the ''[[Film/JurassicPark1993 other]]'' dinosaur movie that came out in 1993, but he did credit the movie with bringing more attention to his novel and he enjoyed parts of it in a SoBadItsGood way.
--> '''Brosnan:''' I've since seen it on video and yes, it is crap and, compared to the film of ''Jurassic Park'' the dinosaurs are laughable, but it's ''interesting'' crap. And thanks to the movie the novel has been reprinted both in the States and here in the U.K. And in fact we are having a re-launch party for the book at my drinking club this very night. The video will also be screened and I will no doubt take the lead in shouting abuse at the screen.
* ExecutiveMeddling: The film adaptation was initially supposed to have a budget of $10,000,000, very high for a Roger Corman production and the script was made with this in mind. Then the budget got slashed to $5,000,000 during pre-production, and then again down to only $500,000 for production. Sources do differ on the exact numbers, but virtually all of the crew confirm the budget wound up being somewhere between 1/10th to 1/20th the size it was supposed to be. Because of this and the production time of the movie being pushed into a smaller and smaller window, numerous scenes, creature effects, and even whole subplots had to be carved down.
* PropRecycling:
** The larger ''Tyrannosaurus'' animatronic was reused for the second and third films without changes, by the time of the latter film it was very much degraded from its constant use not only from its series of origin; but also in the unrelated film ''Film/DinosaurIsland1994''.
** The adult ''Deinonychus'' animatronic of the first film was reworked into the ''Velociraptor'' animatronic for the second and third films.
** The Marines' uniforms in ''Carnosaur 3'' are the same urban camouflage [=BDUs=] from ''Film/TheRock''. An in-series example is the Tyrannosaurus rex prop, that was reused movie to movie. By the time it was used for "Eden Formula", you can tell the prop has degraded.
* ScienceMarchesOn: While reasonably accurate for its day (The book, not the movie, there is nothing remotely accurate about the movie), ''Carnosaur'' is still over 40 years old, so....
** ''Deinonychus'' is portrayed as scaly and using its claws like scythes. We now know that deinonychosaurs had feathers and used their toe claws as hooks.
** It is now known that plesiosaurs cannot lift their necks above water. They also cannot move on land, therefore they gave birth to live young rather than laying eggs.
** ''Scolosaurus'' is now known to be almost identical to ''Euoplocephalus''; the two spikes once thought to have been protruding from the tail club were actually located halfway down the tail.
** It used to be thought that some theropods could be at least partially quadrupedal, and the ''Atispinax'' is portrayed as such in the novel.[[note]]Ironically, it was the spinosaurid ''Baryonyx'' which was discovered in in the same pits as ''Altispinax'', and not ''Altispinax'' itself that was the poster-dino for this trend[[/note]] This is now seen as anatomically impossible. ''Spinosaurus''-- which, despite also having the word spine in its name, is of no relation to ''Altispinax''-- was once considered to have been quadrupedal due to having short hind legs, but even that was disputed and it has been reestablished as a short-legged biped.
** During much of the 20th Century, it was believed ''Megalosaurus'' lived during the Cretaceous as well as the Jurassic, as it was described in the novel. This was because remains of Early Cretaceous theropods discovered in England had been originally assigned to ''Megalosaurus'', but have since turned out to be from different genera.
** Back when the novel was written, several of the featured dinosaurs (namely ''Tyrannosaurus'', ''Tarbosaurus'', ''Megalosaurus'', and ''Altispinax'') would have been considered carnosaurs, as it was thought at the time that all large theropods were fairly closely related. Carnosauria has recently been redefined as ''Allosaurus'' and its close relatives, leaving ''Altispinax'' as the only actual carnosaur in the book. Incidentally, this means none of the dinosaurs in any of the movies are actually carnosaurs.
** ''Deinocheirus'' gets a brief mention and is imagined by Sir Darren Penward to be a super-sized dromaeosaur due it only being known from its arms and foreclaws at the time the novel was written. The real animal isn't even close to this depiction, instead being a giant, hump-backed ornithomimosaur with a duck-like bill.
* WhatCouldHaveBeen: Numerous early drafts and treatments for the film existed before the final product, with some scenes and elements being cut down during production. Paleomedia youtuber, [=DinoDiego=] gathered many sources of these cut pieces of content in his video essay, viewable [[https://www.youtube.com/watch?v=rrGLpaCuygg here]].
** The film originally was going to end with a last shot of the military trying to contain and clear up the virus, killing all of the virus carrying dinosaurs. Only for a reveal that a pterodactyl, unnoticed by them, managed to slip past them. The prop was created and the scene was planned out, but ultimately cut. Like the T-Rex costume, this puppet would eventually show up in ''Film/DinosaurIsland1994''.
** The first film also initially had a ''substantially'' higher budget, with estimates and statements ranging from 5 Million to 10 Million [=USD=], and a much longer production time to finish the film. The final film? Made for less than 1 Million [=USD=] (though sources argue it's actually anywhere from $850,000-$3 million), with just 10 weeks and ''$50,000'' to create the effects and scenes, and then 18 days to shoot it all.
** Originally the third film was not supposed to be a ''Carnosaur'' film and was instead going to be a stand-alone film that just recycled the props. In some territories such as Japan, it was still released as such under the title "Dinosaur Crisis".
* YouLookFamiliar: Rick Dean plays two unrelated characters in ''Carnosaur 2'' and ''3''.
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