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Post by DeadToothCrackKnuckle on Jun 29, 2011 21:16:09 GMT
I was lately working on environments of prehistoric animals and wanted to get some feedback on it. So far I only have this one completed;
Montana to Wyoming, USA 65 MYA
Anatotitan
Ankylosaurus
Brachychampsa
Champosaurus
Cimolestes
Corythosaurus
Dracorex (Pachycephalosaurus?)
Dyrosaurus
Edmontonia
Edmontosaurus
Euoplocephalus
Hypacrosaurus
Lambeosaurus
Leptoceratops
Nanotyrannus (Tyrannosaurus?)
Ornithomimus
Pachycephalosaurus
Parasaurolophus
Stegoceras
Stygimoloch (Pachycephalosaurus?)
Stygiochelys
Thescelosaurus
Torosaurus (Triceratops?)
Triceratops
Troodon
Tylosaurus
Tyrannosaurus
Unfortunately I only have the genuses. Tell if I 'm missing an animal or have an unneeded one also. Hope you like it. ;D
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Post by arioch on Jun 29, 2011 21:41:16 GMT
I think Euoplocephalus, Troodon, Lambeosaurus, Stegoceras, Parasaurolophus, Edmontonia and Hypacrosaurus are actually Campanian or at their best could have reached the very early Maastrichtian , but is almost certain that they didn´t share the environment of Tyrannosaurus and the rest of K-T fauna. About the species you might have missed, it comes to my mind Saurolophus, Dryptosaurus or Atrociraptor (though the last two are probably an exclusively early Maastrichtian genus)  |
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Post by stoneage on Jun 29, 2011 21:44:21 GMT
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Post by Griffin on Jun 29, 2011 21:51:43 GMT
I think Euoplocephalus, Troodon, Lambeosaurus, Stegoceras, Parasaurolophus, Edmontonia and Hypacrosaurus are actually Campanian or at their best could have reached the very early Maastrichtian , but is almost certain that they didn´t share the environment of Tyrannosaurus and the rest of K-T fauna. About the species you might have missed, it comes to my mind Saurolophus, Dryptosaurus or Atrociraptor (though the last two are probably an exclusively early Maastrichtian genus) Keep in mind that Dryptosaurus (at least the fossils that have been found) would have been on the other side of a small sea from those guys during that time. |
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Post by sbell on Jun 29, 2011 21:57:56 GMT
If we assume that dinosaurs did not predict future political boundaries, then the Frenchman formation in southern Saskatchewan (where I am right now!) is essentially the same Maastrichtian age, and includes Dromaeosaurus and Richardoestesia.
Also, why Tylosaurus? It shouldn't really be there, unless you are going age only, since obviously, there would be different environments involved.
And if you include Cimolestes, you should also include Didelphodon (and numerous other mammals).
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Post by arioch on Jun 29, 2011 21:58:48 GMT
I think Euoplocephalus, Troodon, Lambeosaurus, Stegoceras, Parasaurolophus, Edmontonia and Hypacrosaurus are actually Campanian or at their best could have reached the very early Maastrichtian , but is almost certain that they didn´t share the environment of Tyrannosaurus and the rest of K-T fauna. About the species you might have missed, it comes to my mind Saurolophus, Dryptosaurus or Atrociraptor (though the last two are probably an exclusively early Maastrichtian genus) Keep in mind that Dryptosaurus (at least the fossils that have been found) would have been on the other side of a small sea from those guys during that time. Oh true. I thought this was for the whole North America. Anyway is plausible it coexisted with some of this species or at least very close relatives. |
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Post by DeadToothCrackKnuckle on Jun 29, 2011 22:38:47 GMT
I think Euoplocephalus, Troodon, Lambeosaurus, Stegoceras, Parasaurolophus, Edmontonia and Hypacrosaurus are actually Campanian or at their best could have reached the very early Maastrichtian , but is almost certain that they didn´t share the environment of Tyrannosaurus and the rest of K-T fauna. About the species you might have missed, it comes to my mind Saurolophus, Dryptosaurus or Atrociraptor (though the last two are probably an exclusively early Maastrichtian genus) I actually think that Saurolophus went extinct with Albertosaurus and Gorgosaurus (just examples). So I don't think that I'll be adding them to the list. Sorry  |
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Post by arioch on Jun 29, 2011 23:11:13 GMT
Actually we have some evidence of a Saurolophus genus reaching at least the early Maastrichtian in Canada. But wathever you prefer.
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Post by DeadToothCrackKnuckle on Jun 29, 2011 23:13:39 GMT
Actually we have some evidence of a Saurolophus genus reaching at least the early Maastrichtian in Canada. But wathever you prefer. That's definitely something I can agree with, but thank you for your statement. |
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Post by dinoguy2 on Jun 29, 2011 23:23:56 GMT
This is a list of every taxon ever reported, wrong or otherwise. There's no way that lambeosaurine scrap of bone is Parasaurolophus, for example, which lived over 10 million years earlier. And Edmontosaurus regalis has been shown to be only early Maasstrichtian, but like Triceratops, any hadrosaur bone from there gets labelled E. regalis without even being studied. Only E. annectens (and Anatotitan which is almost certainly its synonym) lived in the Hell Creel age. This list is actually a bit better at least for the dinosaurs. en.wikipedia.org/wiki/Hell_Creek_Formation |
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Post by stoneage on Jun 30, 2011 0:02:54 GMT
This is a list of every taxon ever reported, wrong or otherwise. There's no way that lambeosaurine scrap of bone is Parasaurolophus, for example, which lived over 10 million years earlier. And Edmontosaurus regalis has been shown to be only early Maasstrichtian, but like Triceratops, any hadrosaur bone from there gets labelled E. regalis without even being studied. Only E. annectens (and Anatotitan which is almost certainly its synonym) lived in the Hell Creel age. This list is actually a bit better at least for the dinosaurs. en.wikipedia.org/wiki/Hell_Creek_Formation ;D You get your information from Wiki? There were no mammals at Hell Creek? It appears almost everything is Indeterminate! |
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Post by DeadToothCrackKnuckle on Jun 30, 2011 0:18:36 GMT
This what I've got so far;
Hell Creek Formation, USA 65 MYA
Anatotitan copei (?Edmontosaurus annectens) – hadrosaurine ornithopod
Ankylosaurus magniventris – ankylosaurid thyreophoran
Caenagnathus collinsi (?Chirostenotes elegans) – oviraptosaurid theropod
Caenagnathus sp. – oviraptosaurid theropod
Chirostenotes elegans – oviraptosaurid theropod
Dracorex hogwartsia (?Pachycephalosaurus) – pachycephalosaurid marginocephalian
Dromaeosaurus albertensis – dromaeosaurid theropod
?Edmontonia sp. – nodosaurid thyreophoran
Edmontosaurus annectens – hadrosaurine ornithopod
Edmontosaurus regalis – hadrosaurine ornithopod
?Leptoceratops gracilis – ceratopsian marginocephalian
Nanotyrannus lancensis (?Tyrannosaurus rex) – tyrannosaurid theropod
?Ornithomimus sp. – ornithomimid theropod
Pachycephalosaurus wyomingensis– pachycephalosaurid marginocephalian
Paronychodon isoceles – troodontid theropod
Paronychodon laustris – troodontid theropod
?Paronychodon sp. – troodontid theropod
Parasaurolophus walkeri – hadrosaurine ornithopod
Quetzacoatlus northropi – pterosaur
?Richardoestesia isosceles – dromaeosaurid theropod
Richardoestesia gilmorei – dromaeosaurid theropod
?Saurornitholestes langsoni – dromaeosaurid theropod
Sphaerotholus buchholzae – pachycephalosaurid marginocephalian
Sphaerotholus goodwini – pachycephalosaurid marginocephalian
Struthiomimus sedens – ornithomimid theropod
Struthiomimus sp. – ornithomimid theropod
Stygimoloch spinifer (?Pachycephalosaurus) – pachycephalosaurid marginocephalian
Tatankaceratops sacrisonorum – ceratopsian marginocephalian
?Thescelosaurus garbanii – hypsilophodontid ornithopod
Thescelosaurus neglectus – hypsilophodontid ornithopod
?Thescelosaurus sp. – hypsilophodontid ornithopod
Torosaurus latus (?Triceratops horridus) – ceratopsian marginocephalian
Triceratops maximus – ceratopsian marginocephalian
Triceratops horridus – ceratopsian marginocephalian
Triceratops prorsus – ceratopsian marginocephalian
Triceratops serratus – ceratopsian marginocephalian
Troodon formosus – troodontid theropod
?Troodon sp. – troodontid theropod
Tyrannosaurus rex – tyrannosaurid theropod
My brain hurts!
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Post by eriorguez on Jun 30, 2011 6:12:45 GMT
You are ignoring the fact that you are picking up animals from a timespan of over 5 million years. Deinotheres are no longer part of the African savannah ecosystem, for instance.
And you are using also a fair deal of synonims.
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Post by Horridus on Jun 30, 2011 14:19:47 GMT
;D You get your information from Wiki? No, he puts the information there in the first place! |
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Post by neovenator08 on Jun 30, 2011 18:22:19 GMT
Re: Grouping dinosaurs, I've always imagined Neovenators, Hyspilophodons, Iguanodon, Baryonyx, Brachiosaurs and Caulkicephalus (maybe throw in a Nuthetes) together on the IOW, right where I am sitting now, millions of years ago. It's a nice though, but I'm not sure if it's scientifically accurate.
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Post by dinoguy2 on Jun 30, 2011 23:03:35 GMT
This is a list of every taxon ever reported, wrong or otherwise. There's no way that lambeosaurine scrap of bone is Parasaurolophus, for example, which lived over 10 million years earlier. And Edmontosaurus regalis has been shown to be only early Maasstrichtian, but like Triceratops, any hadrosaur bone from there gets labelled E. regalis without even being studied. Only E. annectens (and Anatotitan which is almost certainly its synonym) lived in the Hell Creel age. This list is actually a bit better at least for the dinosaurs. en.wikipedia.org/wiki/Hell_Creek_Formation ;D You get your information from Wiki? There were no mammals at Hell Creek? It appears almost everything is Indeterminate! I said "for dinosaurs". The sections on other critters are very incomplete. Note that only the stuff with a white background is valid, ignore everything else, which is there for historical reference, since many named species from Hell Creek, like most formations, have turned out to be dubious or synonymous or have been reclassified as other things. I tried to put together a Lancian (Hell Creek, Lance, Scollard-age formations) dino fauna on one of my blog posts, taking into account all the available evidence. Here's what I came up with for non-avialan dinosaurs: Theropods: Dromaeosaurinae sp. Zapsalis abradens Richardoestesia gilmorei Richardoestesia isosceles Troodontidae indet. spp. (multiple species, but NOT Troodon formosus) Pectinodon bakkeri Paronychodon sp. Avimimidae sp. Chirostenotes elegans Chirostenotes? sp. Tyrannosaurus rex (=Manospondylus gigas, =Nanotyrannus lancensis) Struthiomimus sedens Ornithomimus velox Ornithomimidae sp. (="Orcomimus") Dromeiceiomimus sp. (=Ornithomimus sp.?) Alvarezsauridae sp. Therizinosauridae sp. Ornithopods: Thescelosaurus garbanii Thescelosaurus neglectus Lambeosaurinae? sp. Edmontosaurus annectens (=Thespesius occidentalis, =Anatotitan copei) Ankylosaurs: Edmontonia schlessmani (=Denversaurus schlessmani) Ankylosaurus magniventris Marginocephalians: Leptoceratops gracilis Pachycephalosaurus wyomingensis Torosaurus latus? Triceratops horridus (=Agathaumas sylvestrus?, =Tatankaceratops?) |
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Post by dinoguy2 on Jun 30, 2011 23:18:54 GMT
Re: Grouping dinosaurs, I've always imagined Neovenators, Hyspilophodons, Iguanodon, Baryonyx, Brachiosaurs and Caulkicephalus (maybe throw in a Nuthetes) together on the IOW, right where I am sitting now, millions of years ago. It's a nice though, but I'm not sure if it's scientifically accurate. That's pretty accurate actually. Almost all those things lived together in the Wessex Formation en.wikipedia.org/wiki/Wessex_FormationExcept... Iguanodon. There are no definite Iguanodon remains from England ever since the name was transferred to the Belgian ones, horrifyingly enough. One of the saddest mistakes in taxonomy  |
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Post by eriorguez on Jul 1, 2011 3:19:23 GMT
Still, knowing Europe is quite small, and how its fauna is consistently homogeneous, I don't think saying an animal virtually identical to the Belgian Iguanodon lived in England would be an outrageous claim. |
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Post by arioch on Jul 1, 2011 11:40:28 GMT
The closest thing we have to I. Bernissantensis in Britain is Barilium (former I. dawsoni), which seem to be quite robust but its not a contemporary of those for like 10 million years, anyway, being such a varied and dispersed family, there could have exist some similar transition form or even Bernissartensis itself nearby...
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Post by dinoguy2 on Jul 1, 2011 23:10:13 GMT
Still, knowing Europe is quite small, and how its fauna is consistently homogeneous, I don't think saying an animal virtually identical to the Belgian Iguanodon lived in England would be an outrageous claim. Well, some of the iguanodonts we know were there were fairly similar. But we'd need a better understanding of the paleogeography. Much of Europe was an archipelago of islands for a lot of the Mesozoic after all. Maybe not an outrageous claim, but it is pure speculation. Like saying a Balaur-like dromaeosaur lived in England. |
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