inherit
21
Uhh... Ughhh..... Uggghhhh...... skypeusername
0
117
DJ Spinosaurus
just call me dj
1,113
Oct 21, 2013 20:15:32 GMT
October 2013
alexcarcharo5
What is a YouTube?
skypeusername
Train
Spinosaurus
Red Panda
i am cool
|
Post by DJ Spinosaurus on Mar 15, 2016 20:59:28 GMT
There has been many debate on what Megaraptorians (such as Megaraptor itself) actually are, some say they are Megalosaurs, others say they are Coelurosaurs, and some others say they are Carnosaurs, so what do you think?
I personally think that Megaraptorians are infant, primitive Coelurosaurs and are distantly related to Tyrannosaurs and Miniraptorians.
Another theory I came up with a few years ago is that they are Carnosaur-Coelurosaur split, like a missing link between the two classes, although I no longer believe this theory.
|
|
inherit
256
0
54
SX Productions
The English dub of Episode 66 can't get here any faster.
712
Sept 21, 2015 23:39:46 GMT
September 2015
sxreturns
SX Productions
andruw.stewart
Ed Wuncler III
T. rex
Ball python
FFFFFF
0000ff
|
Post by SX Productions on Mar 16, 2016 0:09:34 GMT
This is certainly an issue I've been keeping quite the eye on. I like to see where things fit in the great Tree of Life, and megaraptorans are quite enigmatic. To me, it boils down to one fundamental question.
Is Neovenator related to megaraptorans?
At first, it seems like a fairly conclusive answer, yes. However, when you delve into the issue, things become less clear. We know almost certainly that Neovenator sits close to Carcharodontosauridae, but the other members of the "Neovenator-Megaraptor" clade are much less known. Depending on which fossils and traits you choose to observe, we can see that the megaraptorans are more sketchy. We can't quite be sure where to place them yet until we have a more complete understanding of their anatomy.
Personally, I sit in the camp that megaraptorans are indeed tyrannosauroids, albeit not closely related to tyrannosaurids. When you compare the known fossils of Megaraptor and kin, you can see that they resemble tyrannosauroids fairly closely, with long, low snouts and long, three-clawed arms. As I stated before, they don't know all of their anatomy, but it seems clear they were at least resembling tyrannosauroids in form. Whether this is due to convergence, we do not yet know. With the lack of information, we just can't tell.
Final opinion: Megaraptorans were either carnosaurs or tyrannosauroids, and whichever they were, they were clearly mimicking the other. I believe that Neovenator sits within Carcharodontosauria, and megaraptorans are nested in Tyrannosauroidea.
|
|
#00be0f
3
0
1
Feb 24, 2019 19:15:10 GMT
415
themechabaryonyx789
Bowie Dave
4,993
October 2013
themechabaryonyx789
TheMechaBaryonyx789
Baryonyx
Tings
|
Post by themechabaryonyx789 on Mar 16, 2016 18:00:38 GMT
'In this paper, I comment on Porfiri et al. (2014), "Juvenile specimen of Megaraptor (Dinosauria, Theropoda) sheds light about tyrannosauroid radiation". Though Porfiri et al. provided numerous coelurosaurian characters on the Megaraptor specimen, their referral of the taxon to tyrannosauroidea is based on some problematic characters. Also, the specimen bears a feature which does not correspond to tyrannosauroidea. All things considered, the suggested evidences supporting the position of Megaraptora within tyrannosauroidea are weak. Porfiri et al. (2014) stated that their juvenile Megaraptor specimen(MUCPv 595) has unfused nasals, unlike other tyrannosauroids(Holtz 2001, Li et al., 2009). Though they suggested this could be due to its juvenile condition, almost all other known tyrannosauroids have fused nasals even at young growth stages(Xu et al., 2004; Tsuihiji et al., 2011). Also, even the most basal tyrannosauroids have fused nasals as well(Xu et al., 2006), including “suggested” close relatives of megaraptorans like Xiongguanlong and Eotyrannus(Hutt et al., 2001; Li et al., 2009). Therefore, the unfused condition of nasal in Megaraptor casts doubts about its tyrannosauroid systematic position. Though we cannot dismiss the possibility about evolutionary reversals, no other tyrannosauroids have shown this yet. It is worth to note that Tanycolagreus, the taxon which has unfused nasals(Carr and Williamson 2010), had assigned to tyrannosauroidea at least one author(Senter, 2007). However, the position of Tanycolagreus within tyrannosauroidea is in question, too(Rauhut et al., 2010). Moreover, some cranial features of Megaraptor sharing with tyrannosauroids are rather more widespread within coelurosaurian dinosaurs. For example, D-shaped premaxillary teeth are found in non-tyrannosauroid coelurosaurs such as Ornitholestes(Zanno et al., 2011). All things considered, the current evidence supporting the position of Megaraptora within tyrannosauroidea are weak, and more complete known megaraptoran fossils and comparisons of them between basal tyrannosauroids and coelurosaurs would be necessary to solve this issue.' peerj.com/preprints/851.pdf
|
|
inherit
288
0
114
superhamdav
Hainosaurus is now congeneric with Tylosaurus. I guess that means that it's Tylosaurus bernardi now.
3,381
January 2016
superhamdav
Macrophyseter Pictures
Discord>Skype, whatever that is.
I heard inhaling it helps your nose congestion and all.
Whatha's dayuinausoar?
Tylosaurinae mosasaurs
http://i.imgur.com/Ai7iPV0.png
003CFF
|
Post by superhamdav on Mar 16, 2016 23:54:43 GMT
Maybe they should be their own group
|
|
inherit
102
0
77
Monolophosaurus
My favorite number in the alphabet is triangle.
1,094
May 26, 2014 20:39:12 GMT
May 2014
captainjimmbob
Monolophosaurus
House Cat
|
Post by Monolophosaurus on Mar 16, 2016 23:56:57 GMT
Maybe they should be their own group Well of course they are their own group... all groups belong to higher up groups. I can't imagine what you meant to say here. They are almost certainly, in my opinion, basal coelurosaurs.
|
|
inherit
288
0
114
superhamdav
Hainosaurus is now congeneric with Tylosaurus. I guess that means that it's Tylosaurus bernardi now.
3,381
January 2016
superhamdav
Macrophyseter Pictures
Discord>Skype, whatever that is.
I heard inhaling it helps your nose congestion and all.
Whatha's dayuinausoar?
Tylosaurinae mosasaurs
http://i.imgur.com/Ai7iPV0.png
003CFF
|
Post by superhamdav on Mar 16, 2016 23:58:03 GMT
i mean in their own higher groups, like in the same level as the other dinosaur groups like the allosaurs, tyrannosaurs, etc
|
|
inherit
256
0
54
SX Productions
The English dub of Episode 66 can't get here any faster.
712
Sept 21, 2015 23:39:46 GMT
September 2015
sxreturns
SX Productions
andruw.stewart
Ed Wuncler III
T. rex
Ball python
FFFFFF
0000ff
|
Post by SX Productions on Mar 17, 2016 0:17:54 GMT
Admittedly, my position within Tyrannosauroidea was tentative. They are at least within Coelurosauria.
|
|
inherit
102
0
77
Monolophosaurus
My favorite number in the alphabet is triangle.
1,094
May 26, 2014 20:39:12 GMT
May 2014
captainjimmbob
Monolophosaurus
House Cat
|
Post by Monolophosaurus on Mar 17, 2016 0:40:04 GMT
i mean in their own higher groups, like in the same level as the other dinosaur groups like the allosaurs, tyrannosaurs, etc But that doesn't make sense. Carnosauria, the group that includes Allosaurus, is not on the same level as Tyrannosauroidea, it's actually higher (but tyrannosauroids aren't carnosaurs; they are coelurosaurs). It doesn't appear you are very well-versed in dinosaur taxonomy/phylogeny/whatever, so I guess it doesn't matter.
|
|
#00be0f
1
0
1
Sept 19, 2022 0:50:28 GMT
1,130
Theropod
12,650
October 2013
admin
Theropoda Entertainment
Ask through PM
Thero
Genyodectes
Eagle
{"image":"https://66.media.tumblr.com/bec0264f6aea4d9a0137ba0694abea69/tumblr_mmae6u05vY1relrdqo1_1280.jpg","color":"000000"}
460000
ff9900
Example 1
|
Post by Theropod on Mar 17, 2016 1:34:46 GMT
I was able to understand what he meant, no need to go for the super technical side of things.
|
|
inherit
288
0
114
superhamdav
Hainosaurus is now congeneric with Tylosaurus. I guess that means that it's Tylosaurus bernardi now.
3,381
January 2016
superhamdav
Macrophyseter Pictures
Discord>Skype, whatever that is.
I heard inhaling it helps your nose congestion and all.
Whatha's dayuinausoar?
Tylosaurinae mosasaurs
http://i.imgur.com/Ai7iPV0.png
003CFF
|
Post by superhamdav on Mar 17, 2016 2:18:01 GMT
i mean in their own higher groups, like in the same level as the other dinosaur groups like the allosaurs, tyrannosaurs, etc But that doesn't make sense. Carnosauria, the group that includes Allosaurus, is not on the same level as Tyrannosauroidea, it's actually higher (but tyrannosauroids aren't carnosaurs; they are coelurosaurs). It doesn't appear you are very well-versed in dinosaur taxonomy/phylogeny/whatever, so I guess it doesn't matter. I'm not good with dinosaur taxonomy that much; Im good with marine reptile taxonomy
|
|
inherit
102
0
77
Monolophosaurus
My favorite number in the alphabet is triangle.
1,094
May 26, 2014 20:39:12 GMT
May 2014
captainjimmbob
Monolophosaurus
House Cat
|
Post by Monolophosaurus on Mar 17, 2016 2:22:15 GMT
But that doesn't make sense. Carnosauria, the group that includes Allosaurus, is not on the same level as Tyrannosauroidea, it's actually higher (but tyrannosauroids aren't carnosaurs; they are coelurosaurs). It doesn't appear you are very well-versed in dinosaur taxonomy/phylogeny/whatever, so I guess it doesn't matter. I'm not good with dinosaur taxonomy that much; Im good with marine reptile taxonomy That makes sense. I don't know much of anything on marine reptile taxonomy, but if you want dinosaur taxonomy, not to sound arrogant, I'm probably your go-to guy on this forum, maybe except for Theropod. There is also Spinosaurus1 who knows a lot too, but he is a little bit less active. He still exists on here, but not as much as usual. The late great RaptorX and Ornitholestes1 knew a lot too; probably way more than me, but they both disappeared a long time ago. But as far as megaraptorans, I highly doubt they are carnosaurs/allosaurs, at the very least.
|
|
#00be0f
1
0
1
Sept 19, 2022 0:50:28 GMT
1,130
Theropod
12,650
October 2013
admin
Theropoda Entertainment
Ask through PM
Thero
Genyodectes
Eagle
{"image":"https://66.media.tumblr.com/bec0264f6aea4d9a0137ba0694abea69/tumblr_mmae6u05vY1relrdqo1_1280.jpg","color":"000000"}
460000
ff9900
Example 1
|
Post by Theropod on Mar 17, 2016 3:21:29 GMT
I knew more about this stuff, I'm too rusty now. Working more on things now, I really don't have too much time to learn all that again. But will do so at some point.
|
|
inherit
288
0
114
superhamdav
Hainosaurus is now congeneric with Tylosaurus. I guess that means that it's Tylosaurus bernardi now.
3,381
January 2016
superhamdav
Macrophyseter Pictures
Discord>Skype, whatever that is.
I heard inhaling it helps your nose congestion and all.
Whatha's dayuinausoar?
Tylosaurinae mosasaurs
http://i.imgur.com/Ai7iPV0.png
003CFF
|
Post by superhamdav on Mar 17, 2016 3:23:17 GMT
maybe me 2
|
|
inherit
102
0
77
Monolophosaurus
My favorite number in the alphabet is triangle.
1,094
May 26, 2014 20:39:12 GMT
May 2014
captainjimmbob
Monolophosaurus
House Cat
|
Post by Monolophosaurus on Mar 19, 2016 12:44:10 GMT
I knew more about this stuff, I'm too rusty now. Working more on things now, I really don't have too much time to learn all that again. But will do so at some point. It's my obsession, really.
|
|
inherit
288
0
114
superhamdav
Hainosaurus is now congeneric with Tylosaurus. I guess that means that it's Tylosaurus bernardi now.
3,381
January 2016
superhamdav
Macrophyseter Pictures
Discord>Skype, whatever that is.
I heard inhaling it helps your nose congestion and all.
Whatha's dayuinausoar?
Tylosaurinae mosasaurs
http://i.imgur.com/Ai7iPV0.png
003CFF
|
Post by superhamdav on Mar 20, 2016 21:00:47 GMT
that's good
|
|