What are the common names for this organism?
What two groups were they once thought to be a "link" between?
annelids & arthropods
What do they have in common with each group?
segmented like annelids & appendages like arthropods
What group are they thought to be most closely related to today?
When do they show up in the evolutionary history?
Where are they found?
tropical regions of the southern hemisphere
What Phylum are they under and what is their common name?