For those wedded to an evolutionary interpretation of life’s history, the fossil and genetic evidence leave the origin of arthropods a major mystery.
The new evidence is very ambiguous and totally inconclusive. No far-reaching conclusions should be drawn from such dubious material.
The notion that many genes would be required for the Cambrian explosion may seem unsurprising — what is surprising is that anyone would challenge the idea.
It could be anything, from a coelenterate-grade or sponge-grade organism to even a protist or an alga.
So, do high levels of cholesterol biomarkers really suggest an animal affinity of Dickinsonia?