Outsiders of Evolution, forgotten Phylums - Priapulida, or the Sea P##is

In the classification of life, Phylum denotes one of the highest ranks.
It is set below the Kingdom (plants, animals...) and below the class (mammals, amphibians...).

So, if you see some strange animal and if you wonder what the Hell is This?
Well, it is - it. It's a special Phylum. The only thing I can say is that it is - some animal.

Today, the smallest Phylum of all - Priapulida, or the "p##is worms"

Priapulidas are the members of superphylum called Ecdysozoa:

Today there are only 20 species, ranging in size from 0.2 cm to 40 cm.

There are fossils as well:

And a bit more about the classification of this weird Phylum of animals:

If you want to read more about them, here is the link for the real scientific paper:
https://frontiersinzoology.biomedcentral.com/articles/10.1186/1742-9994-6-8

Follow me to see next weir Phylum