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#animals #ceratopsian #dinosaur #speculativeevolution #speculativezoology
Published: 2019-05-22 22:28:20 +0000 UTC; Views: 7299; Favourites: 117; Downloads: 12
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Description
This strange looking animal is Clydeoceratops, a 2m member of the basal Ceratopsian clade Hippogryphoidea. This group has a frustratingly poor fossil record before the Middle Eocene, but phylogenetic studies conducted using living taxa have confirmed that they are very basal members of Ceratopsia. Indeed, they have been found to nest between Yinlong and Chaoyangsaurus on the phylogenetic tree of Ceratopsia. Quite where such a group was hiding during the Cretaceous period has not yet been ascertained, but it has been suggested that the poorly known Late Cretaceous Micropachycephalosaurus was actually an ancestor of this lineage. The earliest members of Hippogryphoidea that are known from decent remains are the Hystricosaurids, which suddenly appear during the Early Eocene of North America at the Green River site. From incredibly well preserved fossils, we know that Hystricosaurids were small, basal Ceratopsians whose backs were covered in spiny quills and possessed strong forelimbs adapted to digging.The limited fossil material attributed to Clydeoceratops conforms to this image and suggests a stocky herbivorous animal with a diet consisting of tough vegetation, roots and tubers. Semi-Intact remains have been found inside the remains of ancient burrows, indicating that these animals may have lived in communal burrows to escape from predators. Perhaps a good analogue for these digging herbivores would be the wombats from OE Australia. During the Middle Oligocene, Hystricosaurids or their close relatives would find their way to Asia, where the Hippogryphoideans would undergo a rapid burst of evolution. But that is a tale best left for another time.
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Comments: 17
Haxorus54 [2019-09-20 15:11:00 +0000 UTC]
And what becomes of the Hippogryphs? Do they make it into the Holocene and if they do, are they found exclusively in the Old World?
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DrPolaris In reply to Haxorus54 [2019-09-20 20:37:55 +0000 UTC]
Yes the Hippogryhoideans are widespread in the Holocene. They live on all continents except Australia and Antarctica. Some of them are the first truly carnivorous Ornithischians to evolve. Overall, they range from Thylacoleo-like predators, small koala-like herbivores to large Entelodon like omnivores.
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Haxorus54 In reply to DrPolaris [2019-09-20 21:13:44 +0000 UTC]
Interesting. And which is the largest of this member of the hippogryphs? Also, on an unrelated note, which families of the Hippogryphoidea, such as the Hystricosauridae, Gryphosauridae, Mortoceratopisdae, and Hippogryphidae, made it into the Holocene and which ones went extinct?
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DrPolaris In reply to Haxorus54 [2019-09-22 22:34:26 +0000 UTC]
The Mortoceratopsids are extinct by the Holocene, having first appeared during the Late Oligocene and dying out during the Pliocene. Hystricosaurids are now confined to the Americas and are small burrow digging omnivores. Gryphosaurids are widespread ambush predators somewhat like Sabertooth cats or Thylacoleo, being heavy-set and powerful as opposed to the Cenodromaeosaurs which are more built for speed. The Hippogryphids are large, fast moving omnivores native to Africa and South Asia. Their niche is something like that of bears or Entelodonts from Our Earth, eating pretty much anything.
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Haxorus54 In reply to DrPolaris [2019-09-22 23:29:16 +0000 UTC]
I see. Thank you for telling me this.
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DrGellar [2019-07-03 04:15:08 +0000 UTC]
This is the beginning of what I have been waiting to see....when the dinos start looking less and less like Mesozoic species. Looking forward to more of these...
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DrPolaris In reply to DrGellar [2019-07-03 21:27:26 +0000 UTC]
Oh just you wait! From the Oligocene onwards, Alter Earth becomes more and more different from the Cretaceous. By the Miocene it is unrecognisable.
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DrPolaris In reply to OviraptorFan [2019-05-22 23:30:50 +0000 UTC]
Yeah, just image where evolution could go with this guy!
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OviraptorFan In reply to DrPolaris [2019-05-22 23:35:04 +0000 UTC]
*insert them suddenly turning into birds*
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Taliesaurus In reply to OviraptorFan [2019-05-27 12:11:02 +0000 UTC]
think more open than that.
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OviraptorFan In reply to Taliesaurus [2019-05-27 16:46:34 +0000 UTC]
i mean, do YOU know whats going to happen to them?
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Taliesaurus In reply to OviraptorFan [2019-05-27 17:05:56 +0000 UTC]
no bu I do know they won't become birds.
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OviraptorFan In reply to Taliesaurus [2019-05-27 17:07:04 +0000 UTC]
I mean, it was a joke, not something to take serious.
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Taliesaurus In reply to OviraptorFan [2019-05-27 17:08:32 +0000 UTC]
sorry I'm bad with jokes.
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YellowPanda2001 In reply to Taliesaurus [2019-05-28 17:56:30 +0000 UTC]
Its gonna evolve to whales, man. And those quills will become flukes.
(This is a joke btw, don't take it serious, fokes).
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