Complex sentence: It has also been claimed that Ediacaran fossils were lichens; although this claim initially met with scepticism for all Ediacaran fossils, additional evidence has been marshalled for a lichen interpretation of "Dickinsonia".
Split into simpler sentences: It has also been claimed that Ediacaran fossils were lichens;, though this claim is controversial. Additional evidence has been marshalled for a lichen interpretation of "Dickinsonia".