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| Extinct Animal Questions | |
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| Topic Started: Nov 26 2013, 10:24 PM (193,468 Views) | |
| CyborgIguana | Jun 15 2014, 06:30 PM Post #391 |
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Well in that case, I think it's a very safe bet that pterosaurs were endothermic, even if dinosaurs weren't. |
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| stargatedalek | Jun 15 2014, 07:29 PM Post #392 |
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I'm not slow! That's just my moe!
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I still think its plausible for a powered flight exothermic animal besides insects to exist I just don't think pterosaurs were that animal I think if pterosaurs were endothermic, that would point towards the ancestors of dinosaurs being endothermic as well |
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| Bigwhale | Jun 16 2014, 02:30 AM Post #393 |
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What probably controlled the anurognathid population? I mean universally. |
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| Even | Jun 16 2014, 02:41 AM Post #394 |
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Larger pterosaurs, tree dwelling carnivores.. |
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| Bigwhale | Jun 16 2014, 02:49 AM Post #395 |
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Yeah, but from what family ?
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| Furka | Jun 16 2014, 03:35 AM Post #396 |
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Lack of food, loss of environment, diseases, competition with other sapecies ... |
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| Mathius Tyra | Jun 16 2014, 03:47 AM Post #397 |
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Rat snake is love... Rat snake is life
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I think those large Rhamphorhynchoids would be one of those predators hunting Anurognathids. |
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| Even | Jun 16 2014, 04:50 AM Post #398 |
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Pterodactyloids too in some settings.. |
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| heliosphoros | Jun 16 2014, 07:45 AM Post #399 |
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Modern swallows, nightjars and insectivorous bats fall prey to a lot of predators, many of which flightless, which take them out when they sleep, so the same would apply to anurognathids. Plus probably some prehistoric version of the fungal diseases that ravage these animals too. |
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| CyborgIguana | Jun 17 2014, 11:42 AM Post #400 |
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That may not necessarily be the case. I think endothermy in pterosaurs probably evolved simultaneously with powered flight. The same seems to be true of birds. A taxon's metabolism isn't necessarily universal.
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Jun 17 2014, 12:03 PM Post #401 |
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Actually considering crocodilians have four chambered hearts, it's more than likely that archosaurs evolved mesothermy very early on in their evolution. Crocodilians lost their higher metabolism more than likely as they became semiaquatic, as a lower metabolism means that you can sit there doing nothing for a lot longer.
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| CyborgIguana | Jun 17 2014, 12:05 PM Post #402 |
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But couldn't pterosaurs and birds have evolved a higher metabolism as their habitats put pressure on them to become more and more physically active and eventually learn to fly? |
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| stargatedalek | Jun 17 2014, 12:06 PM Post #403 |
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I'm not slow! That's just my moe!
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Wouldn't that mean no dinosaurs were endothermic?
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Jun 17 2014, 12:08 PM Post #404 |
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More than likely that's why birds (and probably pterosaurs) evolved higher metabolisms, yes.
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Jun 17 2014, 12:12 PM Post #405 |
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I think the non avian dinosaurs closest related to birds, like maniraptorans, have higher metabolisms than say Apatosaurus. |
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