...is not a dinosaur.

This blog is a result of an erroneous mistake; one day I referred to Dimetrodon as a mammal-like reptile in front of a vertebrate paleomammalogist. These animals are not at all members of Reptilia; they are Synapsids - four-legged, back-boned animals that span back 315 million years on a completely different evolutionary branch on the tree of life.

Since then, I've found Dimetrodon partying with members of Dinosauria across the pages of coloring books and frolicking in the aisles of toy stores, surrounded by lifeforms which evolved some 66 million years after those ancient mammalian relatives.

Submit your photos of any number of creatures - Synapsids, Pterosaurs, Ichthyosaurs - that have been tragically mislabeled. For funsies.

OK, so they say Dimetrodon is a “fin backed reptile”, not a dinosaur, but it’s right there with Apatosaurus, and they’re supposed to be coming out of the same fossil dig site and layer. Same. Layer.

Hnnnggggggg. 

 145 million years separates Dimetrodon from Apatosaurus, and 80 million years from Apatasaurus to Mosasaurus. The latter is a giant aquatic lizard (class Reptilia), and.. you guessed it.. is not a dinosaur.

I’m thinking someone planted some fossils, Berenstain Bears. 

  1. thisisevenharderthannamingablog reblogged this from isnotadinosaur
  2. siriciryel reblogged this from isnotadinosaur
  3. luke-depasquale reblogged this from isnotadinosaur
  4. sarahxnichole921 reblogged this from isnotadinosaur
  5. nimbusprime reblogged this from isnotadinosaur
  6. kittsujen reblogged this from crowley-nightray
  7. crowley-nightray reblogged this from isnotadinosaur
  8. peeuhls reblogged this from sebbot835
  9. sebbot835 reblogged this from forfuneralstocome
  10. forfuneralstocome reblogged this from tyrannosaurslair
  11. meggomaheggo reblogged this from isnotadinosaur
  12. dragonette-baggenette reblogged this from dinodorks
  13. brianjumps reblogged this from isnotadinosaur
  14. notadeinonychus reblogged this from hikingpaleontologist
  15. demigodoftheatre reblogged this from isnotadinosaur
  16. iamoak37 reblogged this from isnotadinosaur