Pseudorhizostomites howchini is an enigmatic member of the Ediacaran Biota which was originally thought to have been a jellyfish of some kind (Sepkoski, 2002).

[1] P. howchini is now thought to either have been a pseudofossil, a gas escape structure or perhaps the result of a rangeomorph holdfast being pulled by currents or, if any of these possibilities are not true, some other force from the sediments which enclosed the fossil.

[3] The decayed parts of the organisms preserved alongside the biogenic structure were also interpreted as escaping through an overlying sand lamina.

[4] The species Rugoconites tenuirugosus was thought to be the originator behind P. howchini ; the fossil was also compared with the living Hydrozoan Campanularia.

[4] Pseudorhizostomites howchini is a form which represents a large amount of grooves radiating from a centre, which along the way irregularly branch out from one-another towards the outside.