Footnote: Roundworms and Earthworms are different animals. The animals cited in this study are roundworms and belong to the Filum Nematoda, one of the most fre

Footnote: Roundworms and Earthworms are different animals. The animals cited in this study are roundworms and belong to the Filum Nematoda, one of the most frequent animals in this planet and also one of the most overlooked. Most of them are not parasite animals, but we know more about the parasites because they cause gross diseases in humans. Earthworms are the common pink worms found on soil, they belong to Filum Annelida (and is true that some european earthworms invaded America a few thousands years ago). Earthworms and humans are basically not directly linked in the trophic chain. We don't feed on them, and they don't feed on us directly or cause us diseases.