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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 (26,844 Views)
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Chuditch
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Jun 26 2018, 11:29 PM
Post #796
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- Hola La
- Jun 26 2018, 11:23 PM
sorry for #OOT question does speculative evolution have discord server ? I would like to join to that server. There is a discord sever. You can join it by PMing Flish, Icthyander or Sphenodon.
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My wildlife YouTube channel
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lamna
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Jun 29 2018, 06:20 PM
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Did Giganotosaurus evolve into Mapusaurus?
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Living Fossils
Fósseis Vibos: Reserva Natural
34 MYH, 4 tonne dinosaur.
- T.Neo
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Are nipples or genitals necessary, lamna? [flash=500,450] Video Magic! [/flash]
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LittleLazyLass
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Jun 29 2018, 08:12 PM
Post #798
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Proud quilt in a bag
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Certainly not impossible, but it's hard to really say with certainty. Little evidence to give a strong indication either way.
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totally not British, b-baka!
You like me (Unlike) I don't even really like this song that much but the title is pretty relatable sometimes, I guess.
Me  Forum user Uncanny Gemstar drew what is supposed to be a me. Thanks! Spoiler: click to toggle As they walk in, they're greeted by a small, poorly kept pathway leading to a poorly constructed Japanese-style gate. Behind this, a small field made up of corn, rice, wheat, potatoes, among other plants is contrasted by large piles of books, as well as a few rather out of place looking laptops. Off in the corner, a small woman, with long, striped, and strikingly colorful socks, no shoes, unremarkable denim shorts, a large, fancy black coat, arm warmers, glasses, a tuque, and somewhat unkempt, mid-length blue-and-pink-streaked red hair, is rummaging through a trash bin, located behind a sign saying "employees only". She continues this for a while (walking behind a wall to change her outfit now and then), until one of her visitors coughs. Startled, she looks up, apologizes, and grabs a handful of textbooks and novels before daintily running off to join them. What, you want me to tell you what these mean? Predenterra The (Lost) Lost World The Standing World Read First Clarifications on my sex and genderSorry if I come off as rude, I don't put much thought into word choice sometimes. I'm also super prone to editing my posts, sometimes multiple times, in the minutes following posting. For the love of god, take my posts from my earlier days on the forum with a grain of salt. I was not particularly knowledgeable or mature back then. Some of them are so cringe-worthy I can't even bring myself to look at them. Words Maybe Great Words - Words To Spec By
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Yeah, and even if you don't agree with creationists on that concept, that doesn't mean they can't be decent people. I have friends who are creationist (possibly even young earth) that I get along with fine in general life. I don't think they're right of course, but that doesn't make them intellectual degenerates. ~~The Words of forbidden3
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im the black market
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Stuff
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Nyarlathotep
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Jun 30 2018, 03:20 AM
Post #799
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The anatomy is definitely more derived, with tiny arms and anatomy good for hunting sauropods like Argentinosaurus, while Giganotosaurus was likely a solitary hunter of things like Andesaurus. Mapusaurus was one of the last carcharadontasaurs period so it does seem a relevant comparison.
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Octoaster
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Jun 30 2018, 05:41 AM
Post #800
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I'm usually pretty knowledgeable with invertebrates and the like, but what's always puzzled me is the neural network of echinoderms, specifically starfish. Do they actually lack a brain or do they just have a decentralized intelligence like bobbit worms do?
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Open at own risk.
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Sceynyos-yos
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Jun 30 2018, 06:50 AM
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From wikipedia:
- Quote:
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Echinoderms have a simple radial nervous system that consists of a modified nerve net consisting of interconnecting neurons with no central brain, although some do possess ganglia. Nerves radiate from central rings around the mouth into each arm or along the body wall; the branches of these nerves coordinate the movements of the organism and the synchronisation of the tube feet. Starfish have sensory cells in the epithelium and have simple eyespots and touch-sensitive tentacle-like tube feet at the tips of their arms. Sea urchins have no particular sense organs but do have statocysts that assist in gravitational orientation, and they have sensory cells in their epidermis, particularly in the tube feet, spines and pedicellariae. Brittle stars, crinoids and sea cucumbers in general do not have sensory organs but some burrowing sea cucumbers of the order Apodida have a single statocyst adjoining each radial nerve and some have an eyespot at the base of each tentacle.
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IIGSY
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Jun 30 2018, 03:13 PM
Post #802
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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 a way to get a large, active insect in a cold, snowy environment? Here's what I was thinking
1. Make it floofy 2. Give it abdominal muscles to actively pump air in and out of the spiracles 3. Give it similar thermo-regulatory abilities to a honeybee
Granted, some insects already do this. But could this work for a very large insect, something Meganeura sized? If so, would it be able to move around and survive in such an environment to a similar degree that birds and mammals do?
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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 "Arthropod respiratory systems aren't really "inefficient", they're just better suited to their body size. It would be quite inefficient for a tiny creature that can easily get all the oxygen it needs through passive diffusion to have a respiratory system that wastes energy on muscles that pump air into sacs. (Hence why lungless salamanders, uniquely miniscule and hyperabundant tetrapods, have ditched their lungs in favor of breathing with their skin and buccal mucous membranes.) But large, active insects already use muscles to pump air in and out of their spiracles, and I don't see why their tracheae couldn't develop pseudo- lungs if other conditions pressured them to grow larger."-HangingTheif
"Considering the lifespans of modern non- insect arthropods (decade-old old millipedes, 50 year old tarantulas, 100+ year old lobsters) I wouldn't be surprised if Arthropleura had a lifespan exceeding that of a large testudine"-HangingTheif
"Humans have a tribal mindset and it's not alien for tribes to war on each other. I mean, look at the atrocities chimpanzee tribes do to each other. Most of people's groupings and big conflicts in history are directly or obliquely manifestations of this tribal mindset."-Sceynyos-yis
"He's the leader of the bunch You know his Coconut Gun is finally back to fire in spurts. His Coconut Gun Can make you smile If he shoots ya it's firing in spurts. His Coconut Gun Is bigger, faster, stronger too! He's the gun member of the Coconut Crew! HUH!
C.G.! Coconut Gun! C.G.! Co-Coconut Gun! Shoot yourself with a Coconut Gun! HUH!"-Kamineigh
"RIP, rest in Peytoia."-Little
"In Summary: Piss on Lovecraft's racist grave by making lewds of Cthulhu and Nyarlathotep.
Then eat arby's and embrace the void."-Kamineigh
"Dougal Dixon rule 34."-Sayornis
Phylogeny of the arthropods and some related groups
In honor of the greatest clade of all time
More pictures
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All African countries can fit into Brazil
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Rodlox
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Jul 1 2018, 03:34 AM
Post #803
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- IIGSY
- Jun 30 2018, 03:13 PM
Is there a way to get a large, active insect in a cold, snowy environment? Here's what I was thinking
1. Make it floofy 2. Give it abdominal muscles to actively pump air in and out of the spiracles 3. Give it similar thermo-regulatory abilities to a honeybee
Granted, some insects already do this. But could this work for a very large insect, something Meganeura sized? If so, would it be able to move around and survive in such an environment to a similar degree that birds and mammals do? if the support-structure problem has been solved - yes
if the problem has not been solved - no, it won't get THAT big.
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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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Cool_Hippo43
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Jul 1 2018, 02:30 PM
Post #804
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about chemosynthetic and so on ... let's suppose we have a silly basal prokaryote, and he phagocytes things some of them phagocytosed mitochondria and cyanobacteria [...] but would give one of these basal prokaryotes phagocytic mitochondria and then some basal lithotrophic bacteria that uses inorganic substances to generate glucose (iron, ammonia, sulfur, nitrite ...). could it evolve into a kind of "chemosynthetic plant"? where this bacterium (which is an organelle now) generates glucose, which feeds a mitcondira just as chloroplasts do with plants?
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IIGSY
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Jul 1 2018, 03:14 PM
Post #805
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A huntsman spider that wastes time on the internet because it has nothing better to do
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- Rodlox
- Jul 1 2018, 03:34 AM
- IIGSY
- Jun 30 2018, 03:13 PM
Is there a way to get a large, active insect in a cold, snowy environment? Here's what I was thinking
1. Make it floofy 2. Give it abdominal muscles to actively pump air in and out of the spiracles 3. Give it similar thermo-regulatory abilities to a honeybee
Granted, some insects already do this. But could this work for a very large insect, something Meganeura sized? If so, would it be able to move around and survive in such an environment to a similar degree that birds and mammals do?
if the support-structure problem has been solved - yes if the problem has not been solved - no, it won't get THAT big. This insect is as large as Meganeura or Meganeuropsis, which didn't have exoskeletons. Internal supports are completely unnessecary
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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 "Arthropod respiratory systems aren't really "inefficient", they're just better suited to their body size. It would be quite inefficient for a tiny creature that can easily get all the oxygen it needs through passive diffusion to have a respiratory system that wastes energy on muscles that pump air into sacs. (Hence why lungless salamanders, uniquely miniscule and hyperabundant tetrapods, have ditched their lungs in favor of breathing with their skin and buccal mucous membranes.) But large, active insects already use muscles to pump air in and out of their spiracles, and I don't see why their tracheae couldn't develop pseudo- lungs if other conditions pressured them to grow larger."-HangingTheif
"Considering the lifespans of modern non- insect arthropods (decade-old old millipedes, 50 year old tarantulas, 100+ year old lobsters) I wouldn't be surprised if Arthropleura had a lifespan exceeding that of a large testudine"-HangingTheif
"Humans have a tribal mindset and it's not alien for tribes to war on each other. I mean, look at the atrocities chimpanzee tribes do to each other. Most of people's groupings and big conflicts in history are directly or obliquely manifestations of this tribal mindset."-Sceynyos-yis
"He's the leader of the bunch You know his Coconut Gun is finally back to fire in spurts. His Coconut Gun Can make you smile If he shoots ya it's firing in spurts. His Coconut Gun Is bigger, faster, stronger too! He's the gun member of the Coconut Crew! HUH!
C.G.! Coconut Gun! C.G.! Co-Coconut Gun! Shoot yourself with a Coconut Gun! HUH!"-Kamineigh
"RIP, rest in Peytoia."-Little
"In Summary: Piss on Lovecraft's racist grave by making lewds of Cthulhu and Nyarlathotep.
Then eat arby's and embrace the void."-Kamineigh
"Dougal Dixon rule 34."-Sayornis
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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Russwallac
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Jul 1 2018, 04:47 PM
Post #806
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Animals in cold environments need to be proportionately bulkier than their warm-climate counterparts in order to slow heat loss. An animal as lean as Meganeura would lose heat very quickly, so even if this theoretical insect is the same length, it'd be much more massive.
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"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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IIGSY
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Jul 1 2018, 05:51 PM
Post #807
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- Russwallac
- Jul 1 2018, 04:47 PM
Animals in cold environments need to be proportionately bulkier than their warm-climate counterparts in order to slow heat loss. An animal as lean as Meganeura would lose heat very quickly, so even if this theoretical insect is the same length, it'd be much more massive. That's a good point. So, would an insect that size still be able to get by without an endoskeleton?
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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 "Arthropod respiratory systems aren't really "inefficient", they're just better suited to their body size. It would be quite inefficient for a tiny creature that can easily get all the oxygen it needs through passive diffusion to have a respiratory system that wastes energy on muscles that pump air into sacs. (Hence why lungless salamanders, uniquely miniscule and hyperabundant tetrapods, have ditched their lungs in favor of breathing with their skin and buccal mucous membranes.) But large, active insects already use muscles to pump air in and out of their spiracles, and I don't see why their tracheae couldn't develop pseudo- lungs if other conditions pressured them to grow larger."-HangingTheif
"Considering the lifespans of modern non- insect arthropods (decade-old old millipedes, 50 year old tarantulas, 100+ year old lobsters) I wouldn't be surprised if Arthropleura had a lifespan exceeding that of a large testudine"-HangingTheif
"Humans have a tribal mindset and it's not alien for tribes to war on each other. I mean, look at the atrocities chimpanzee tribes do to each other. Most of people's groupings and big conflicts in history are directly or obliquely manifestations of this tribal mindset."-Sceynyos-yis
"He's the leader of the bunch You know his Coconut Gun is finally back to fire in spurts. His Coconut Gun Can make you smile If he shoots ya it's firing in spurts. His Coconut Gun Is bigger, faster, stronger too! He's the gun member of the Coconut Crew! HUH!
C.G.! Coconut Gun! C.G.! Co-Coconut Gun! Shoot yourself with a Coconut Gun! HUH!"-Kamineigh
"RIP, rest in Peytoia."-Little
"In Summary: Piss on Lovecraft's racist grave by making lewds of Cthulhu and Nyarlathotep.
Then eat arby's and embrace the void."-Kamineigh
"Dougal Dixon rule 34."-Sayornis
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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Ragnar
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Jul 3 2018, 08:16 AM
Post #808
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Dear IIGSY,
Personally, I believe an insect the size of Meganeura would certainly require some form of structural support, given the relative mass and and rather robust build of the animal. Insect exoskeletons act as rigid attachment sites for their muscles, therefore providing greater leverage than their chordate counterparts. After all, ants are able to carry many times their own body weight, something most, if not all chordates are incapable of achieving.
If you prefer an exoskeleton, you could concentrate insulating adipose tissue under the carapace. In addition, this tissue might develop into a second fat layer usedsolely for metabolic heat production, similar to the brown fat of newborn human infants. Perhaps the organism's bulk abdominal musculature could become concentrated in the animal's centre. Provided with sufficient vascularisation, the organism may be able to achieve a countercurrent exchange of any body heat generated by the muscles. This strategy is frequently utilised by some partially-endothermic sharks. With the aid of insulating tissues and the distance of these muscles from the insect's epidermis, internal heat loss would be minimal.
On the other hand, if you opt for an endoskeleton, you could gradually internalise parts of the carapace and develop insulating, hair-like filaments on the now exposed epidermal layer, although you will sacrifice significant muscle leverage.
I hope you find this information helpful. I am by no means an expert on entomology or other related fields.
Yours Truly, Ragnar
Edited by Ragnar, Jul 3 2018, 08:19 AM.
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HangingThief
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Jul 3 2018, 09:18 AM
Post #809
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- Ragnar
- Jul 3 2018, 08:16 AM
Perhaps the organism's bulk abdominal musculature could become concentrated in the animal's centre. Provided with sufficient vascularisation, the organism may be able to achieve a countercurrent exchange of any body heat generated by the muscles. The most important muscles in an insect's body are in the thorax, which is already at the center in compact- bodied insects. Bumblebees, large moths and other insects already generate heat from their thoracic muscles, but they're small enough that they don't need vascular activity to warm their entire bodies.
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Hey.
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Ragnar
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Jul 3 2018, 10:12 AM
Post #810
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Good evening!
Is aragonite a biologically viable alternative to a cartilage or calcium phosphate endoskeleton?
If so, how might it be produced within an organism?
Would such a development lead to a significant fitness advantage, or are there any restrictions regarding the use of this material?
Kind regards, Ragnar
Edited by Ragnar, Jul 3 2018, 03:53 PM.
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