are there any animals alive today that survived the permian extinction and have remained relatively unchanged?

2020-10-20 6:50 am
更新1:

@JazSinc horseshoe crabs and nautilus are cambrian (450-500mya) and living specimines are nearly identical to Ordovician fossils. compare that to the 250mya triassic....... dragonflies are also quite a bit older, but have changed

回答 (4)

2020-10-23 2:02 am
Don't assume that because an animal looked the same then than it does now that means it has not changed. There was a lizard in the Cretaceous which looks identical to ancestors in Australia, but internally the animal changed a lot, on both a physical and biological level, but its outer appearance seems the same. 
 

With that said, many arthropods and cephalopods look the same. Check out the horse shoe crab 
2020-10-21 8:46 am
Protozoans, sponges, jellyfish . . . .
2020-10-20 7:24 am
Sharks are relatively unchanged over eons. They do very well as is.
2020-10-21 1:34 am
No.  Our oldest animal species are from the Triassic.  Change happens.
Edit:
"Nearly identical" is not the same.  "Horseshoe crab" isn't a species.  Neither is "nautilus."
Triops cancriformis -- down to the species -- have been extant from Triassic to today.  That's the oldest animal species.


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