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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 (26,868 Views)
Bob-The-Seagull-King
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Heyall - does anyone know how difficult the process for becoming endothermic/ectothermic is? iirc there's only been one species of mammal to re-evolve ectothermy and I wanted to know if that would have been a difficult/very slow process.
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Archeoraptor
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IIGSY
Apr 12 2018, 06:31 PM
CaledonianWarrior96
Apr 12 2018, 03:43 PM
How big can marine gastropods reach before their size becomes an issue? I'm aware there is the reef glider in TFIW that has been said to reach ten feet in length and weigh like a tonne, but since that's not the most scientifically accurate show I thought it would be better to ask this here. Can gastropods like sea slugs reach similar sizes as cephalopods like giant squid or would they be limited to a smaller body size due to their body structure?
Gastropods, and mollusks in general, have an advantage over arthropods in that they have readily available internal support and less restrictive out coverings. I think a giant, marine gastropod can grow to be quite larger given the right conditions. There is one disadvantage gastropods have against cephalopods though, and that's their respiratory system. In cephalopods it is closed while it is open in gastropods. I don't know how large the disparity between the two would be tho
you mena circulatory?
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Archeoraptor
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Archeoraptor
Apr 15 2018, 07:13 AM
IIGSY
Apr 12 2018, 06:31 PM
CaledonianWarrior96
Apr 12 2018, 03:43 PM
How big can marine gastropods reach before their size becomes an issue? I'm aware there is the reef glider in TFIW that has been said to reach ten feet in length and weigh like a tonne, but since that's not the most scientifically accurate show I thought it would be better to ask this here. Can gastropods like sea slugs reach similar sizes as cephalopods like giant squid or would they be limited to a smaller body size due to their body structure?
Gastropods, and mollusks in general, have an advantage over arthropods in that they have readily available internal support and less restrictive out coverings. I think a giant, marine gastropod can grow to be quite larger given the right conditions. There is one disadvantage gastropods have against cephalopods though, and that's their respiratory system. In cephalopods it is closed while it is open in gastropods. I don't know how large the disparity between the two would be tho
you mena circulatory?
Quote:
 
Heyall - does anyone know how difficult the process for becoming endothermic/ectothermic is? iirc there's only been one species of mammal to re-evolve ectothermy and I wanted to know if that would have been a difficult/very slow process.

crocs may have evolved from endotherms
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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Cool_Hippo43
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Apr 14 2018, 05:55 AM

So, I'd say the first thing you'll want to do is to make your "rhinogrades" ectotherms, like my antmice from Settlers from the Deep. Maybe you can make them descend from something that lived in a very warm and very energy-poor environment. I'm not sure of how flight would complicate the situation.
sorry for my ignorance, but I looked at your project and found nothing about this "antmice", so I would like to understand more how this works.

about the flight, I want to say the flight to the normal "rhinogrates", of normal size
and not for the "insects"(But I've seen it now so maybe its possible https://en.wikipedia.org/wiki/Kitti%27s_hog-nosed_bat )

and adding, why do insects (and a lot of other animals) manage to be so small?
Edited by Cool_Hippo43, Apr 15 2018, 09:13 AM.
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Beetleboy
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I understand that after the hypothetical second Pangaea that is thought to occur in the future, after that any details on future continents becomes somewhat hazy. However, can anybody point me in the right direction of how the continents may split up? Or do we have no clue whatsoever?
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CaledonianWarrior96
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Beetleboy
Apr 15 2018, 11:56 AM
I understand that after the hypothetical second Pangaea that is thought to occur in the future, after that any details on future continents becomes somewhat hazy. However, can anybody point me in the right direction of how the continents may split up? Or do we have no clue whatsoever?
We basically have no idea what's going to happen as far as I'm aware. That's where speculation on what continents after Pangea II is basically speculation. You can imagine what the continents would look like but their formation depends on how the supercontinent splits itself
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LλmbdaExplosion
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Similar to how the recent super continent split up.At least 4 or many continents can form.

Pure speculation
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Dromaeosaurus
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Cool_Hippo43
Apr 15 2018, 07:37 AM
sorry for my ignorance, but I looked at your project and found nothing about this "antmice", so I would like to understand more how this works.

Here they are.

Insects started out small, AFAIK, and sub-centimeter size are the default for most or all phyla. Hoeothermic metabolism just really penalizes small sizes. I also recall reading somewhere, maybe on Gert Van Dijk's blog, that external skeletons are more efficient than internal ones at a small scale.
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lamna
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Hmm, been thinking about New Zealand and the Seychelles. Both are fragments of continents, and both are either largely submerged, or were in the past. Both have no land mammals, but both are home to fairly diverse reptilian and amphibian fauna. But both would have had mammals at one point. We do have a mammal fossil from New Zealand, and both islands were part of chunks of Gondwanaland at some point.

There are two possibilities when it comes to this fauna. One, that these islands were totally submerged, and that all life there colonised it from nearby landmasses. Two, that their were small island refuges that remained above the sea.

This seems to say one of two things. Either, frogs and caecilians are better at rafting across open ocean than mammals. Or mammals are not as well suited to surviving in tiny refugia. I'd suspect that it's the latter, but does anyone know better?

The whole thing is made more confusing by the fact that mammals clearly can raft pretty large distances, primates and rodents colonised the South America and Madagascar from Africa after all.
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lamna
Apr 15 2018, 07:24 PM
Hmm, been thinking about New Zealand and the Seychelles. Both are fragments of continents, and both are either largely submerged, or were in the past. Both have no land mammals, but both are home to fairly diverse reptilian and amphibian fauna. But both would have had mammals at one point. We do have a mammal fossil from New Zealand, and both islands were part of chunks of Gondwanaland at some point.

There are two possibilities when it comes to this fauna. One, that these islands were totally submerged, and that all life there colonised it from nearby landmasses. Two, that their were small island refuges that remained above the sea.

This seems to say one of two things. Either, frogs and caecilians are better at rafting across open ocean than mammals. Or mammals are not as well suited to surviving in tiny refugia. I'd suspect that it's the latter, but does anyone know better?

The whole thing is made more confusing by the fact that mammals clearly can raft pretty large distances, primates and rodents colonised the South America and Madagascar from Africa after all.
I suppose the fact that the St Bethans mammal made it to New Zealand and died off suggest one of the causes for it's extinction could be the latter but it could also be other things like a minor extinction event, climate change, disease etc. New Zealand, as much of a fragment as it is, is still an impressively large landmass compared to other islands so I don't think mammals would have a tough time surviving there for millions of years. Especially when New Zealand is a similar size/maybe larger than Madagascar and mammals have done very well there for tens of millions of years
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lamna
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I'm fairly sure that at some point in the past New Zealand was mostly or even wholly submerged. The islands as they are are obviously large enough for mammals.
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Are there any major changes that a mushroom would have to go through to become aquatic? Obviously there would be a few necessary changes that would allow them to survive, but what would those necessary changes be? googling "aquatic mushroom" results in references to a Psathyrella aquatica, but i was unable to find any specific information on what allows it to have an aquatic lifestyle.
Edited by ZoologicalBotanist, Apr 16 2018, 07:16 AM.


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Can grasses be replaced by horsetails?Even of the grasses exist since middle Cretaceous?
Edited by LλmbdaExplosion, Apr 16 2018, 12:49 PM.
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Cool_Hippo43
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can bats occupy a niche like those of birds? (not the actual bats, but a flying mammal as a bat but not so specialized for echolocation)

(yes I know that birds occupy many ninchs, but I think of something like colorful day bats like tropical birds)

and just as a joke, it would have like a bird to develop echolocation XD ? like birds bats and bats birds
.edit
I just discovered that there are birds that do echolocation [https://en.wikipedia.org/wiki/Swiftlet]
it's surprising how lately I've been interested in clades that I've always reneged on, like rodents and bats ... maybe one day I'll come to like birds
Edited by Cool_Hippo43, Apr 16 2018, 07:00 PM.
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Cool_Hippo43
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hum, back the colored plants
As would be the dynamics between these different species of autotrophic type, the earth is dominated by green plants, but in a planet with plants of other colors as they would be distriución them by the globe? They could exist together creating different types of biomes normally, or one would end up always leaving in front of the other ??
Edited by Cool_Hippo43, Apr 17 2018, 05:52 PM.
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