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PostSubject: Ask a paleo question   Ask a paleo question Icon_minitimeTue Jun 07, 2016 5:35 pm

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeWed Jun 08, 2016 5:14 pm

I'll do better and ask 2 questions.

1. Why hasn't Saurophaganax been properly described as an Allosaurus species yet? I mean considering how common Allosaurus remains are one would think this would have occurred some time ago.

2. Since the Brachiosaurus inherited the 90ft length from the few brachiosaur bones of Ultrasauros, does this mean that the American species of Torvosaurus also inherits the 35-36 ft length from Edmarka since it's considered remains of Torvosaurus?

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeWed Jun 08, 2016 5:56 pm

Rhedo wrote:
1. Why hasn't Saurophaganax been properly described as an Allosaurus species yet? I mean considering how common Allosaurus remains are one would think this would have occurred some time ago.

2. Since the Brachiosaurus inherited the 90ft length from the few brachiosaur bones of Ultrasauros, does this mean that the American species of Torvosaurus also inherits the 35-36 ft length from Edmarka since it's considered remains of Torvosaurus?

1. Saurophaganax has been declared a separate genus from Allosaurus in the latest study assessing allosauroids.

2. Yes, T.tanneri could grow to lengths of 36-38ft, as the Edmarka specimens were reassigned to it.

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeWed Jun 08, 2016 6:04 pm

@Oliphaunt wrote:
Rhedo wrote:
1. Why hasn't Saurophaganax been properly described as an Allosaurus species yet? I mean considering how common Allosaurus remains are one would think this would have occurred some time ago.

2. Since the Brachiosaurus inherited the 90ft length from the few brachiosaur bones of Ultrasauros, does this mean that the American species of Torvosaurus also inherits the 35-36 ft length from Edmarka since it's considered remains of Torvosaurus?

1. Saurophaganax has been declared a separate genus from Allosaurus in the latest study assessing allosauroids.

2. Yes, T.tanneri could grow to lengths of 36-38ft, as the Edmarka specimens were reassigned to it.

Did they use the recent New Mexico specimen for that? Also, T. tanneri would be 5-6 tons correct?
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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeWed Jun 08, 2016 10:40 pm

@Rhedosaurus wrote:
@Oliphaunt wrote:
Rhedo wrote:
1. Why hasn't Saurophaganax been properly described as an Allosaurus species yet? I mean considering how common Allosaurus remains are one would think this would have occurred some time ago.

2. Since the Brachiosaurus inherited the 90ft length from the few brachiosaur bones of Ultrasauros, does this mean that the American species of Torvosaurus also inherits the 35-36 ft length from Edmarka since it's considered remains of Torvosaurus?

1. Saurophaganax has been declared a separate genus from Allosaurus in the latest study assessing allosauroids.

2. Yes, T.tanneri could grow to lengths of 36-38ft, as the Edmarka specimens were reassigned to it.

Did they use the recent New Mexico specimen for that? Also, T. tanneri would be 5-6 tons correct?

I don't know, but there's three known specimens of Saurophaganax (IIRC) that were used. And yes, T.tanneri was ~5.8 tons.

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeThu Jun 09, 2016 9:13 am

Any information about non-beaked coelurosaur heads?

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeSat Jun 11, 2016 10:09 am

I remember reading-It was most likely Gregory S. Paul's book on carnivorous dinosaurs-that Yangchuanosaurus was better adapted for hunting then Allosaurus. Is that true? And does the size of 35-36 ft still hold up today?

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeSat Jun 11, 2016 10:41 am

@Rhedosaurus wrote:
I remember reading-It was most likely Gregory S. Paul's book on carnivorous dinosaurs-that Yangchuanosaurus was better adapted for hunting then Allosaurus. Is that true? And does the size of 35-36 ft still hold up today?

No, neither is ''more adapted for hunting'' than the other. Although Yang was larger. And yes, it was about 34-35 ft in total length.

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeSat Jun 11, 2016 10:55 am

@Oliphaunt wrote:
@Rhedosaurus wrote:
I remember reading-It was most likely Gregory S. Paul's book on carnivorous dinosaurs-that Yangchuanosaurus was better adapted for hunting then Allosaurus. Is that true? And does the size of 35-36 ft still hold up today?

No, neither is ''more adapted for hunting'' than the other. Although Yang was larger. And yes, it was about 34-35 ft in total length.

How much did it weigh? 3-4 tons or so?
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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeSat Jun 11, 2016 11:49 am

@Rhedosaurus wrote:
@Oliphaunt wrote:
@Rhedosaurus wrote:
I remember reading-It was most likely Gregory S. Paul's book on carnivorous dinosaurs-that Yangchuanosaurus was better adapted for hunting then Allosaurus. Is that true? And does the size of 35-36 ft still hold up today?

No, neither is ''more adapted for hunting'' than the other. Although Yang was larger. And yes, it was about 34-35 ft in total length.

How much did it weigh? 3-4 tons or so?

~4.5 t, IIRC.

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeSat Jun 11, 2016 11:54 am

How is Elaphrosaurus considered a member of the Ceratosaur family?

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeMon Jun 13, 2016 6:06 am

@Rhedosaurus wrote:
How is Elaphrosaurus considered a member of the Ceratosaur family?

Rauhut et al. 2016 recently classified it within the Noasauridae (which is a branch under Abelisauroidea) in Ceratosauria. So realistically speaking it may actually be more closely linked to Abelisaurids, but still hence under the group Ceratosauria.

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeTue Jun 14, 2016 1:49 pm

i saved the entire second Ask A Paleo-Question thread and alot of the first from JPL, if anyone wants me to repost the old stuff--i figure it'd be a useful resource for anyone and everyone

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeSat Jun 18, 2016 1:21 pm

Are Gasosaurus and Kaijiangosaurus still valid species despite their limited remains? If so, is the second dinosaur considered a full grown version of the first?

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeSat Jun 18, 2016 2:19 pm

Both are currently considered valid as independant species, from what I've seen.

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeSat Jun 18, 2016 10:56 pm

has a complete skull of Becklespinax ever been found?

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeSat Jun 18, 2016 11:28 pm

I don't think we have skull material of Becklespinax at all, actually.

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeMon Jun 20, 2016 7:04 pm

Do the 6 species of Maimenchisaurus represent stages of growth?

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeTue Jun 21, 2016 4:35 pm

@Rhedosaurus wrote:
Do the 6 species of Maimenchisaurus represent stages of growth?

Unlikely given most of them lived in different formations.

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeTue Jun 21, 2016 9:41 pm

I have two questions. First, is the explanation that Nanotyrannus is actually a juvenile Tyrannosaurus rather than its own genus the more accepted conclusion? I know there's the 'Dueling Dinosaurs' specimen, but I believe it hasn't actually been properly studied.

Second, in Jurassic Fight Club, there's the rather unbelievable claim that Allosaurus hunted Ceratosaurus into extinction, with the main explanation being, "As you go farther up [as in start to get into younger rock] in the Geologic Time Scale you start seeing more Allosaurus specimens and fewer Ceratosaurus specimens." Is there any weight to this statement? I always found it completely absurd.
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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeTue Jun 21, 2016 10:31 pm

@Tacticool Rex wrote:
I have two questions. First, is the explanation that Nanotyrannus is actually a juvenile Tyrannosaurus rather than its own genus the more accepted conclusion? I know there's the 'Dueling Dinosaurs' specimen, but I believe it hasn't actually been properly studied.

Second, in Jurassic Fight Club, there's the rather unbelievable claim that Allosaurus hunted Ceratosaurus into extinction, with the main explanation being, "As you go farther up [as in start to get into younger rock] in the Geologic Time Scale you start seeing more Allosaurus specimens and fewer Ceratosaurus specimens." Is there any weight to this statement? I always found it completely absurd.

@1; The dominant view's that Nanotyrannus is a juvenile Tyrannosaurus, however, you'll still find people who conclude otherwise based on supposed features of the ''Dueling Dinosaurs'' specimen, which is kind of irrelevant until it can be properly analyzed.

@2; Oddly enough, Wikipedia seems to hold that Ceratosaurus survived into younger layers than Allosaurus did. Either way, if there was really this gradual variation between the % of both species, it's most likely that one outcompeted the other for prey and resources, not actively predated it.

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeWed Jun 22, 2016 5:25 pm

@Oliphaunt wrote:


@1; The dominant view's that Nanotyrannus is a juvenile Tyrannosaurus, however, you'll still find people who conclude otherwise based on supposed features of the ''Dueling Dinosaurs'' specimen, which is kind of irrelevant until it can be properly analyzed.

@2; Oddly enough, Wikipedia seems to hold that Ceratosaurus survived into younger layers than Allosaurus did. Either way, if there was really this gradual variation between the % of both species, it's most likely that one outcompeted the other for prey and resources, not actively predated it.

There are other reasons why some people believe that Nanotyrannus is it's own dinosaur. Apparently, the holotype skull shows adult features and that there are so many teeth described as that of Nanotyrannus that many people consider it too much for it to be an adult.

Has there been any scientific research done to prove that the head and neck of Nemegtosaurus is actually that of Opisthocoelicaudia?
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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeWed Jun 22, 2016 5:39 pm

@Rhedosaurus wrote:
@Oliphaunt wrote:


@1; The dominant view's that Nanotyrannus is a juvenile Tyrannosaurus, however, you'll still find people who conclude otherwise based on supposed features of the ''Dueling Dinosaurs'' specimen, which is kind of irrelevant until it can be properly analyzed.

@2; Oddly enough, Wikipedia seems to hold that Ceratosaurus survived into younger layers than Allosaurus did. Either way, if there was really this gradual variation between the % of both species, it's most likely that one outcompeted the other for prey and resources, not actively predated it.

There are other reasons why some people believe that Nanotyrannus is it's own dinosaur. Apparently, the holotype skull shows adult features and that there are so many teeth described as that of Nanotyrannus that many people consider it too much for it to be an adult.

Has there been any scientific research done to prove that the head and neck of Nemegtosaurus is actually that of Opisthocoelicaudia?

The skull showing ''adult features'' is most likely bull. Even Nanotyrannus supporters agree that the known specimens aren't fully grown, although they diverge on how much it had yet to grow. There being 'too many teeth' is simply another line of evidence for it being a juvenile, as juvenile dinosaurs were much more common than adult ones.

And not that I know of.

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeWed Jun 22, 2016 5:50 pm

Is Tianzhenosaurus still considered it's own ankylosaur or is it a far more complete specimen of Shanxia?

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeWed Jun 22, 2016 6:46 pm

When was it decided that 66 Million Years Ago was the established date for the extinction of the dinosaurs as opposed to 65 Million Years Ago? Was there a paper or new release of evidence that dated the KT Boundary and the extinction event more precisely than before?

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeWed Jun 22, 2016 9:18 pm

sounds to me like they just decided to round it up--as i understand it the traditional date had actually been 65.5 million years ago

btw, does anyone know what the correct form of drypto in other dinosaur names would be if it were used in place of tyrannus? (i'm debating whether an altered name of Yutyrannus, for example, would be Yudryptos or Yudryptus)

(second edit) and another: does anyone know the exact date that Eoraptor's description was published? i know it was in 1993 but need something more specific than that

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeSat Jun 25, 2016 2:14 pm

Is the skeleton of Gondanatitan a juvenile?

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeMon Jun 27, 2016 6:14 am

If Prehistoric Wildlife's info is straight (it almost never is...) then Gondwanatitan was an 8-meter-long animal, so the 7m holotype was probably a subadult.

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeMon Jun 27, 2016 10:55 am

Do you think Spinosaurus walked on 4 legs, 2 legs, or both? I'd say both, like this.Ask a paleo question Bipedal_spinosaurus_by_thedinorocker-d8esjfv

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PostSubject: Re: Ask a paleo question   Ask a paleo question Icon_minitimeMon Jun 27, 2016 5:36 pm

@Gojira2014 wrote:
Do you think Spinosaurus walked on 4 legs, 2 legs, or both? I'd say both, like this.Ask a paleo question Bipedal_spinosaurus_by_thedinorocker-d8esjfv

It most likely did both, but for most of the time it was a quadrupedal animal. Any time spent on it's two main legs was for a short time period.
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