Hallucigenia is famous as the strangest of all the strange invertebrate fossils from the 'Cambrian Explosion', found in the Burgess Shale in the Rockies. Its name indicates how strange it was - like a small worm with long spikes down one side of its body and soft arms or legs down the other and a puffy end that seemed to get squashed when it was fossilised. I awoke this morning to hear a scientist from Cambridge talking about it on 'Today' the BBC's flagship radio news programme, which was almost as bizarre, since the fossil is over 500 million years old and was discovered over 100 years ago He was Martin Smith, who has finally identified and described Hallucigenia's head, which was just as strange as the rest of its body. https://www.youtube.com/watch?v=9-Z9Ssgb0Kg Alan
I'm being reminded somehow of the Calvin and Hobbs where Calvin digs up a bunch of garbage in his backyard and puts it together, claiming that its a Dinosaur. Also, of the poem he wrote about scientists of the future finding his skeleton and putting it together wrong and wonder how he could have lived like that.
Hallucigenia is just an armoured proto-peripatus. Wierder was the lamprey Tullimomstrum. Not some lamprey relative: but nested within recognisable fossil lampreys. Something similar could evolve somehow from the modern lampreys in future.
Tullimonstrum only confused palaeontologists for about 60 years, Hallucigenia has been a puzzle for much longer. And I did qualify the word 'strangest' with reference to the Cambrian
In November, I went to the natural history museum in Oxford. It has a good collection on invertebrate systematics, but the Hallucinogenia model was upside down.