Abstract
ABSTRACTThis work shows evidence of complete encapsulated development of Onchidella marginata for the first time in South America. Recent common ancestry was suggested for geographically separated New Zealand sub-Antarctic and South American populations of Onchidella. This could be explained as driven by passive rafting mediated by circumpolar ocean currents. In samples from mussel- and algal-beds in intertidal rocky shores from the southern tip of South America (Tierra del Fuego Island, Argentina) we found both adults and egg masses, and crawling hatchlings were observed.
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