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Questions that don't need their own topics vol.2; New and fresh
Topic Started: Jan 4 2018, 11:18 AM (26,852 Views)
Archeoraptor
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"A living paradox"
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bolosaurs were bipedal

what help you need bettleboy
Astarte an alt eocene world,now on long hiatus but you never know
Fanauraa; The rebirth of Aotearoa future evo set in new zealand after a mass extinction
coming soon......a world that was seeded with earth´s weridest
and who knows what is coming next...........

" I have to know what the world will be looking throw a future beyond us
I have to know what could have been if fate acted in another way
I have to know what lies on the unknown universe
I have to know that the laws of thee universe can be broken
throw The Spec I gain strength to the inner peace
the is not good of evil only nature and change,the evolution of all livings beings"
"
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Beetleboy
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neither lizard nor boy nor beetle . . . but a little of all three
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Mm well it sounds rather stupid but I'm getting rather confused by it all and I would really like some clarification on a few simple things.

Firstly, the most obvious and stupid one:

What groups of mammals were around at the end of the Mesozoic - basically, before the K-Pg event?
~ The Age of Forests ~
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Cool_Hippo43
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Hippo
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supposing that a group of basal fish with 6 fins evolved separately from the basal tetrapods and became 6-member vertebrates ... could they achieve propelled flight? like a dragon (4 legs on the ground and a pair of wings) or something like a biped animal with 2 pairs of wings? I do not know if these bodily plans support flight
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Rodlox
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Cool_Hippo43
Jun 2 2018, 10:40 AM
supposing that a group of basal fish with 6 fins evolved separately from the basal tetrapods and became 6-member vertebrates ... could they achieve propelled flight? like a dragon (4 legs on the ground and a pair of wings) or something like a biped animal with 2 pairs of wings? I do not know if these bodily plans support flight
yes. any body plan can support flight. except for (name redacted)
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Rodlox
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Beetleboy
Jun 2 2018, 10:37 AM
Mm well it sounds rather stupid but I'm getting rather confused by it all and I would really like some clarification on a few simple things.

Firstly, the most obvious and stupid one:

What groups of mammals were around at the end of the Mesozoic - basically, before the K-Pg event?
monotremes, marsupials, placentals, docodonts, sparassadonts, multitubercates

ps: thats not a stupid question.
Edited by Rodlox, Jun 2 2018, 12:51 PM.
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Tartarus
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Prime Specimen
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Rodlox
Jun 2 2018, 12:51 PM
monotremes, marsupials, placentals, docodonts, sparassadonts, multitubercates
Apparently the most recent known docodonts were in the Early Cretaceous, so unless some even more recent fossils get found we can't include them as examples of mammals from the end of the Mesozoic (also, whether one can even count the docodonts as "mammals" is another issue, as they are outside the crown group mammals).

Apart from that, your list seems fairly good. I think the earliest know marsupial and placental fossils are from the Palaeocene, but its likely their origins go all the way back to the latest part of the Cretaceous so that's OK. To your list I would also add eutriconodonts, gondwanatheres, dryolestoids, non-marsupial metatherians such as the stagodonts, and non-placental eutherians such as the cimolestans.
If we're using "mammal" to refer to more than just crown-group mammals, then we could also include the haramiyidans, a group of mammaliforms that survived up until the end of the Cretaceous.
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Mynameisnotdave23
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Idiot Extraordinaire
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Did dicynodonts (and other advanced non-mammalian therapsids) produce milk? (Like platypuses?) Would it be safe to assume that they did?
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Rodlox
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Mynameisnotdave23
Jun 2 2018, 09:30 PM
Did dicynodonts (and other advanced non-mammalian therapsids) produce milk? (Like platypuses?) Would it be safe to assume that they did?
milk or something close enough to milk, that only a specialist would quibble over if it is or not.
.---------------------------------------------.
Parts of the Cluster Worlds:
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Archeoraptor
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"A living paradox"
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those types of secretions are more common outside mammals than you think
would not be surprised if IIGS got in from some existing roaches
Astarte an alt eocene world,now on long hiatus but you never know
Fanauraa; The rebirth of Aotearoa future evo set in new zealand after a mass extinction
coming soon......a world that was seeded with earth´s weridest
and who knows what is coming next...........

" I have to know what the world will be looking throw a future beyond us
I have to know what could have been if fate acted in another way
I have to know what lies on the unknown universe
I have to know that the laws of thee universe can be broken
throw The Spec I gain strength to the inner peace
the is not good of evil only nature and change,the evolution of all livings beings"
"
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whachamacallit2
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Guy who yells at squirrels
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GreatAuk
Jun 1 2018, 09:54 AM
How long will the Galapagos islands last?
I had answered this a little ways back, so I'll just quote what I wrote.

Quote:
 
In lines of the Galapagos, there really isn't any estimates, but we do know a bit of it's history, that might help us figure it out. First, the volcanic province that made the islands is relatively young, having begun around 20 million years ago-maybe a bit more, but that still up in the air. This would seem to indicate that it might still be quite active in the future.

However, we also know that the mantle plume's maximum potential intensity is similar to the Icelandic plume and only half as strong as the Hawaiian plume. Now I'm going to go on a bit of a speculative leap here, but this may indicate that the Galapagos plume won't last nearly as long as the Hawaiian plume, so the island chain may not last more than... 50 to 100 million years? I'm spit-balling with that estimate, btw.

Although do note that even in that case, the islands 50 millions hence will most certainly not be the current islands, but entirely new ones. The Nazca plate will move those current islands off the mantle plume, and they'll erode to nothing over time.
Edited by whachamacallit2, Jun 4 2018, 03:14 PM.
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CaledonianWarrior96
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An Awesome Reptile
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Is there any reason why poisonous reptiles (specifically lizards) haven't evolved; using the toxin as a defence tactic? And for clarification I mean as in the animal has toxins in its skin or body that would make it dangerous to eat and not venom it uses to inject into prey.
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IIGSY
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A huntsman spider that wastes time on the internet because it has nothing better to do
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CaledonianWarrior96
Jun 3 2018, 09:34 AM
Is there any reason why poisonous reptiles (specifically lizards) haven't evolved; using the toxin as a defence tactic? And for clarification I mean as in the animal has toxins in its skin or body that would make it dangerous to eat and not venom it uses to inject into prey.
Well, there's this

https://en.wikipedia.org/wiki/Rhabdophis_tigrinus
Projects
Punga: A terraformed world with no vertebrates
Last one crawling: The last arthropod

ARTH-6810: A world without vertebrates (It's ded, but you can still read I guess)

Potential ideas-
Swamp world: A world covered in lakes, with the largest being caspian sized.
Nematozoic: After a mass extinction of ultimate proportions, a single species of nematode is the only surviving animal.
Tri-devonian: A devonian like ecosystem with holocene species on three different continents.

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Phylogeny of the arthropods and some related groups


In honor of the greatest clade of all time


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Dromaeosaurus
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Haemothermic orthostatic matrotrophic lexiphanic deuterostome
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Terraraptor411
May 20 2018, 07:12 PM
Would it be possible for a mammal or bird to evolve parthenogenesis?
This is coming really late, but there are reports of parthenogenesis in birds. This source (pdf) mentions it in chicken, turkey, pigeon and zebra finch. It's extremely rare and "almost always abortive", but it happens.
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CaledonianWarrior96
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An Awesome Reptile
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How relatively easy is it for amphibians to evolve resistances against chytridiomycosis caused by Batrachochytrium dendrobatidis or related/similar disease causing fungi?
Come check out and subscribe to my projects on the following subforums;

Future Planet (V.2): the Future Evolution of Life on Earth (Evolutionary Continuum)
The Meuse Legacy: An Alternative Outcome of the Mosasaur (Alternative Evolution)
Terra Cascus: The Last Refuge of the Dinosaurs (Alternative Evolution)
- Official Project
- Foundation
The Beryoni Galaxy: The Biologically Rich and Politically Complex State of our Galaxy (Habitational Zone)

- Beryoni Critique Thread (formerly: Aliens of Beryoni)
The Ecology of Skull Island: An Open Project for the Home of King Kong (Alternative Universe)
The Ecology of Wakanda: An Open Project for the Home of Marvel's Black Panther (Alternative Universe)

(Click bold titles to go to page. To subscribe click on a project, scroll to the bottom of the page and click "track topic" on the bottom right corner)


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IIGSY
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A huntsman spider that wastes time on the internet because it has nothing better to do
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Is there any way I could get copepods to fully terrestrialize? They lack a heart, gills and any kind of circulatory system. Oxygen just passes through them because they are so small. But this wont work for a fully terrestrial animal.
Edited by IIGSY, Jun 6 2018, 12:58 PM.
Projects
Punga: A terraformed world with no vertebrates
Last one crawling: The last arthropod

ARTH-6810: A world without vertebrates (It's ded, but you can still read I guess)

Potential ideas-
Swamp world: A world covered in lakes, with the largest being caspian sized.
Nematozoic: After a mass extinction of ultimate proportions, a single species of nematode is the only surviving animal.
Tri-devonian: A devonian like ecosystem with holocene species on three different continents.

Quotes


Phylogeny of the arthropods and some related groups


In honor of the greatest clade of all time


More pictures


Other cool things


All African countries can fit into Brazil
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