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{"image":"https://66.media.tumblr.com/bec0264f6aea4d9a0137ba0694abea69/tumblr_mmae6u05vY1relrdqo1_1280.jpg","color":"000000"}
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Post by Theropod on Dec 6, 2014 17:28:57 GMT
That's something I was going to explain with this post.
Spinosaurus aegyptiacus' quadrupedalism could've been an exclusive, environmental adaptation. However, seeing as Oxalaia quilombensis is a very close relative, and likely was also very closely connected to Spinosaurus aegyptiacus due to their geographical positions. Therefore, it seems safe to assume that Oxalaia quilombensis could've had a similar build, and even if Maganuco's 6-7 tons were underestimated by 1-2 tons, even being extremely generous, isometric scaling would yield ~3.7 tons.
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thesporerex
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Example 4
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Post by thesporerex on Dec 6, 2014 17:30:28 GMT
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Post by spinosaurus1 on Dec 6, 2014 21:52:26 GMT
oxalia is vertually spinosaurus. so much so that they can even signify an analogous species. the fossil rostrum of Oxalaia is pretty much identical to that of Spinosaurus. The teeth sockets even matched in both morphology and location. that, plus the fact of possible spinosaur fossils being found in the Maevarano Formation, suggesting that they lived throughout the late cretaceous. it can be said that our little Brazilian friend that we obtained wasn't even fully grown individual and could just be spinosaurus aegyptiacus exploiting its semi aquatic adaptions.
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#00be0f
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Post by Theropod on Dec 6, 2014 22:22:03 GMT
Although the resemblances could mean they're analogous species, it doesn't seriously mean they're the same.   There's a big difference there, right? Tiger and lion skulls, respectively. They're in the same genus, yes, but they're not the same species. Plus, Oxalaia quilombensis is extremely widely accepted as its own species, and no compelling evidence seems to ultimately prove them as analogous to eachother. |
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Post by spinosaurus1 on Dec 6, 2014 23:44:14 GMT
yet there are obvious distinctions between the skulls. heres a better comparative image  unlike lions and tigers, their are NO clear distinctions found between either spinosaurine that are seen as of now. note that i'm not making a defenative statement. just stating the possibility that desplatosaurus could be fighting essentially spinosaurus in this particular match. |
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Post by Monolophosaurus on Dec 7, 2014 1:47:18 GMT
Spinosaurus aegyptiacus lived at a different place and time from Oxalaia quilombensis. But that is about the only difference I can come up with.
If they are the same genus, I would be surprised if they were the exact same species.
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Post by spinosaurus1 on Dec 7, 2014 2:55:28 GMT
thats not what new fossil evidence is saying. the findings of possible spinosaur remains in the Maevarano Formation ( a formation that mainly obtains fossils from the upper cretaceous), it would suggest that spinosaurines lived throughout the late cretaceous. meaning that spinosaurus and oxalia had interchangeable time periods and, given their newly discovered aquatic adaptions, could of have a greater extended range through the use of transcontinental travel, being that Brazil wasn't that far from Africa during that time.  |
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Post by Theropod on Dec 7, 2014 16:05:29 GMT
Seeing as it was found in a different continent, separated from Africa by the ocean, it can be considered a different species.
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Post by spinosaurus1 on Dec 7, 2014 16:24:45 GMT
yes, a very small ocean. is there any reason to presume that spinosaurus couldn't have just swam there? it was obviously built to do it. the possibility of it being the same species still stands
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Post by thesporerex on Dec 7, 2014 21:40:45 GMT
 This is all we have found. No point making up baseless assumptions. |
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Post by Theropod on Dec 7, 2014 21:53:24 GMT
Swimming in an ocean is a whole different story when you are semi-aquatic. Mosasaurs, sharks, storms, that's just the start of what would likely kill it before it reached the other continent. Spinosaurids are also specialised, so it makes sense that their skulls wouldn't vary that much.
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Post by spinosaurus1 on Dec 7, 2014 22:12:57 GMT
thesporax- its not a baseless assertion. its something paleontologist is considering right know, at least naming oxalia as spinosaurus quilombensis feel free to check this out  its that close. theropod look at this map.  that is a small ass ocean separating the two continents. matter of fact, theres a greater distance between Morocco and Egypt than between Morocco and Brazil.. of course it can not be said to sure that spinosaurus can and did make this sort of travel, but this new morphology does bring it into consideration, hell, salt water crocodiles travel even larger expansion of ocean to different island to intercept sea turtles that come to lay eggs, and do i even need to say that their semi- aquatic?. the idea is not impossible. and it's not like mosasaurs and sharks are some sort of primitive, murderous monster waiting to kill any spinosaurus that comes into the ocean. by your logic, how the did sea turtles and other fauna lower on the food chain survive? and storms, really? every day must be a stormy day in the late cretaceous if your relying on that to make an assertion that spinosaurus couldn't make that journey. i am not making any confirmed claims, i'm telling you that there is a possibility that oxalia could be spinosaurus. key word " possibility." of course nothing neglacts the possibility that oxalia is a seperate taxon, but as of now, even that isn't completely confirmed. until more evidence pops up, this should be labeled as a possibility. |
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Post by Monolophosaurus on Dec 7, 2014 23:40:15 GMT
Cross ocean travel is something that I find highly unlikely to be done by a semi-aquatic creature.
Why would it do this anyway? There is no reason a Spinosaurus aegyptiacus would travel over an ocean, from a large continent to a much smaller one (not that they would know that). There are few semi-aquatic animals today that would swim across an ocean. When was the last time a platypus, or, even a crocodile swam across an ocean?
I really do not follow either side of the argument. They both have some great points, the fragments are almost identical, yet, otherwise, I can seem to come up with how they could be the same. The logic just is not there for me. I do not think Oxalaia quilombensis is Spinosaurus aegyptiacus, but I could see how it could be Spinosaurus quilombensis.
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Post by spinosaurus1 on Dec 7, 2014 23:52:20 GMT
apparently crocs who are semi- aquatic have done it. so why can't a 15-16 meter long theropod that is also semi aquatic? look at the link below www.livescience.com/6534-secret-revealed-crocodiles-cross-oceans.htmlwww.huffingtonpost.com/2010/06/08/crocodiles-surfing-across-oceans_n_605368.htmlsalt water crocodiles can travel to nearby islands true the use of oceanic travel by the use of both their aquatic adaptions and the use of ocean currents. and they accomplish long distance travel with these methods. and how can you say there is no reason for spinosaurus to attempt such conquest? nobody does. that information is completely hidden by the ancient biomes influencing causes that happen over 98 million years ago. unless your a time traveler, you can't say there isn't a reason unless with sufficient evidence. this new proposal is no more then a Possibility. right now, it is obvious more evidence is needed for this, but by far, peices are being added up. the fact that the remains look almost identical, the fact that spinosaurus is alot more adapted to aquatic life then expected, the fact that their timelines intercepted, the fact that their land masses were so close to one another. only separated by an ocean barely big enough to be even called an ocean. and finally the fact that spinosaur remains are found aging throughout the late Cretaceous. doesn't this get you wondering my point is that this new proposal could be possible (zzz) |
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Post by Theropod on Dec 8, 2014 0:10:19 GMT
It's simple; storms do happen more often in oceans and even coastal areas for that matter. And plus, what's really stopping a mosasaur from attacking a theropod swimming in the ocean? It is extremely likely to happen.
Plus, just seeing as both were found in completely different continents, as well as being specialised species actually doesn't make it all that highly possible. I'm not denying the possibility, but it's not that high. And moreover, most paleontologists still consider them different taxa, so?
The point here is that it isn't really all that likely, probably not to the point it's worth mentioning.
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