One of the few features that are uncontroversial is the body size: The fossils measure usually 1-5 cm in length.
Ikaria wariootia is just another problematic Ediacaran fossil that could be anything from inorganic artifact to protozoan to cnidarian and yes, maybe a bilaterian worm.
I promised last year to follow up on more alleged Ediacaran animals. Now is a good moment to come back to this, with a new study having just been published in the journal Nature Communications.
Small putative trackways in Siberian rocks are giving evolutionists an opportunity to claim bilaterian animals preceded the Cambrian explosion.