Szaniawski also found that the conodont teeth had a structure similar to the grasping apparatus found on some arrow worms.
(Arrow worm; Credit: Zatelmar)
Some arrow worm species carry the neurotoxin tetrodotoxin, so it's possible that conodonts could inject a similar substance into victims. This neurotoxin has no known antidote. Pufferfish, mola, porcupine fish, triggerfish, the blue-ringed octopus and rough-skinned newts all possess tetrodotoxin.
You have to marvel at nature. Here we are, replacing technologies from last year, but this venom may have done the job well the first time starting at 500 million years ago, before dinosaurs even walked the earth.
Szaniawski mentions other venomous animals in his paper. It's always interesting to me that very few living mammals are venomous. A few species of shrews have poisonous saliva and the male duck-billed platypus has a venomous spur on its hind leg. All existent poisonous and venomous mammals "are regarded as being very primitive," he wrote.