Comment on xkcd #3204: Dinosaurs And Non-Dinosaurs
leftzero@lemmy.dbzer0.com 2 weeks agoTrue, (some) snakes have also evolved specialized fangs.
Several times independently with significantly different designs, it seems.
Comment on xkcd #3204: Dinosaurs And Non-Dinosaurs
leftzero@lemmy.dbzer0.com 2 weeks agoTrue, (some) snakes have also evolved specialized fangs.
Several times independently with significantly different designs, it seems.
lemming@sh.itjust.works 2 weeks ago
I’m a little disappointed, I was hoping for some very specific explanation why it’s technically different :-) It’s cool that they are independent, thanks!
leftzero@lemmy.dbzer0.com 2 weeks ago
Well, reptiles seem to have split pretty early on between the ancestors of lizards and snakes (and the lonely tuatara)), and the ancestors of turtles, crocodiles, and dinosaurs, the main differences seemingly being in the bones of the skull, and specifically for the group with the snakes and lizards in, the ability to self-amputate the tail (though that’s lost in many of their descendants), and the keratinized scales; you won’t see a turtle, crocodile, or dinosaur melting its whole skin in one go like lizards and snakes do, they’ll molt their scales (or feathers, or scutes) one at a time.