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| Questions that don't need their own topics vol.2; New and fresh | |
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| Topic Started: Jan 4 2018, 11:18 AM (26,857 Views) | |
| Cool_Hippo43 | May 20 2018, 05:15 PM Post #616 |
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Hippo
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how exactly does the claw of arthropods (crabs, lobsters, scorpions ...) - how did this structure form and if is possible the similar structure in a vertebrate? and how and why mammals became viviparous? Why did the development of the fetus inside the mother replace the eggs? Could this happen to birds and reptiles, for example? Edited by Cool_Hippo43, May 20 2018, 07:34 PM.
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| ÐK | May 20 2018, 05:33 PM Post #617 |
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Adult
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It's pretty well agreed upon that Triceratops horridus evolved directly into Triceratops prorsus for one, and that Daspketosaurus horneri evolved from Daspletosaurus torosus, but other than that there aren't really any confirmed examples of anagenesis on a named taxon basis in Mesozoic dinosaurs. It's believed that there are other examples of it Late Cretaceous North America (the Daspletosaurus thing has been on the table as part of this idea for decades before officially being written upon recently), but it's otherwise very hard to determine when such events occur from the fossil record. You often need large sample sizes, and a relatively continuous record between two or more species to be sure, both things most Mesozoic dinosaur genera are lacking. Even then, these are species that are unanimously agreed to belong to the same genus, and since most dinosaurs are only ever regarded of at the generic level, it's much less obvious where one genus could have evolved directly into another since they're liable to be more greatly separated in time and by their morphology. |
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~Projects~ • Earth Without Earth; Like nothing on Earth...
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| Talenkauen | May 20 2018, 05:41 PM Post #618 |
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Perpetually paranoid iguanodont
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I can definitely see that. After looking at a lot of parareptile skulls for my newest spec endeavors, many of them look absolutely nothing like each other. They look like various true reptiles and reptilimorph amphibians lumped together. Edited by Talenkauen, May 20 2018, 05:41 PM.
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PLEASE NOTE: If I come off as harsh or demanding whilst talking to you, please tell me. I apologize in advance..... UPCOMING PROJECTS: Projects here
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| Terraraptor411 | May 20 2018, 07:12 PM Post #619 |
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Troodontid
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Would it be possible for a mammal or bird to evolve parthenogenesis? |
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Current Projects: Alien Earth Ultimate Pangea Potential Future Projects Future of the North Star: TBD My DA Page: https://terraraptor.deviantart.com/ | |
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| Rebirth | May 20 2018, 08:09 PM Post #620 |
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Adolescent
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Would it be possible for an amphibian to mate similarly to anglerfish, but instead of the males latching on with the mouths they latch on with something else? Part of my tree-like temnospondyls idea has a species of which the males are caecilian or snake-like and form part of the tree-like female's body, acting as extra heads like Medusa for catching smaller prey. |
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My Projects Spoiler: click to toggle
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| Bob-The-Seagull-King | May 20 2018, 09:39 PM Post #621 |
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Bob, king of the seagulls
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To my knowledge, the process through which anglerfish join their host mate isn't directly tied with the mouth - it's just that for them it's a convenient way to get a secure grip without evolving a special new appendage. Frogs already have appendages just for grabbing so I figure it's as possible as any other method of frogs evolving to meld with female hosts. |
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“The search for truth takes us to dangerous places,” said Old Woman Josie. “Often it takes us to that most dangerous place: the library. You know who said that? No? George Washington did. Minutes before librarians ate him.” ― Joseph Fink, Welcome to Night Vale “Librarians are hideous creatures of unimaginable power. And even if you could imagine their power, it would be illegal. It is absolutely illegal to even try to picture what such a being would be like.” ― Joseph Fink, Welcome to Night Vale "Blep" ― Diglett, My Blue Tonge
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| Rodlox | May 20 2018, 10:02 PM Post #622 |
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Superhuman
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yes. pretty much all of them, except for the early ones. |
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.---------------------------------------------. Parts of the Cluster Worlds: "Marsupialless Australia" (what-if) & "Out on a Branch" (future evolution) & "The Earth under a still sun" (WIP) | |
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| lamna | May 21 2018, 02:16 AM Post #623 |
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This was a mystery to me for a long time, but it's pretty simple, it's just a modified leg. The top part of the pincer is the last joint, while the lower part of the pincer is just a big outgrowth of the second to last joint. I don't know if something like that could happened. I guess if a animal grew some sort of bony or horny projection from their second finger joint. |
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Living Fossils Fósseis Vibos: Reserva Natural 34 MYH, 4 tonne dinosaur. [flash=500,450] Video Magic! [/flash] | |
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| Cool_Hippo43 | May 21 2018, 03:35 PM Post #624 |
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Hippo
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this is a silly question but it has like an animal to have a posture biped like a human, with hooves and legs like those of an ungulate (like a minotaur) I do not know if this leg system is the most suitable for a biped march Edited by Cool_Hippo43, May 21 2018, 03:36 PM.
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| Rodlox | May 21 2018, 09:39 PM Post #625 |
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Superhuman
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so, basically almost any ratite, then. yeah, it works fine. (ostriches may not have outright hooves, but short toes and hooflike claws) |
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.---------------------------------------------. Parts of the Cluster Worlds: "Marsupialless Australia" (what-if) & "Out on a Branch" (future evolution) & "The Earth under a still sun" (WIP) | |
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| Rebirth | May 24 2018, 12:29 AM Post #626 |
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Adolescent
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Apart from the primitive ichthyosaurs without dorsal fins, are there any other extinct animals which resemble the dinosaurs and other reptiles depicted in the Crystal Palace? |
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| LλmbdaExplosion | May 24 2018, 01:07 AM Post #627 |
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Vieja Argentea the oscar cichlid
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What animals would be Schnitzel and Chowder from Chowder?What mammals to be exact? |
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When life give you lemons.............Don't make lemonade!Make life to take the lemons back!Get mad and than.........Yell,demand and burn down their homes. Prepare for unforeseen consequences,Mr. Freeman! | |
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| Rodlox | May 24 2018, 02:24 AM Post #628 |
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Superhuman
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in which section do reviews of movies with spec scenes/potential go? |
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.---------------------------------------------. Parts of the Cluster Worlds: "Marsupialless Australia" (what-if) & "Out on a Branch" (future evolution) & "The Earth under a still sun" (WIP) | |
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| Russwallac | May 24 2018, 07:37 AM Post #629 |
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"Ta-da!"
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Indeterminate Cartoon Critters.
Cafe Cosmique. |
"We've started a cult about a guy's liver, of course we're going to demand that you give us an incredibly scientific zombie apocalypse." -Nanotyranus
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| LλmbdaExplosion | May 24 2018, 08:14 AM Post #630 |
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Vieja Argentea the oscar cichlid
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You gave me an idea,maybe the next project might be centered about the world and critters of Chowder. |
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When life give you lemons.............Don't make lemonade!Make life to take the lemons back!Get mad and than.........Yell,demand and burn down their homes. Prepare for unforeseen consequences,Mr. Freeman! | |
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7:46 PM Jul 10