Abstract
CARLISLE1 described a new species of ascidian, Styela mammiculata, which was first taken in 1953, near Plymouth. If, as Carlisle suggested, this is an introduced species, it may be expected to spread. The discovery of numerous specimens on various submerged surfaces and in dredged material in Langston Harbour, Hampshire, during the summer of 1959, is therefore of interest. The species appears to be extending its range rapidly along the south coast of England, and increasing in numbers where already established. We expect it to spread to other sheltered and warm areas of the British and continental coast, either by natural means or by transport on the hulls of ships.
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References
Carlisle, D. B., J. Mar. Biol. Assoc. U.K., 33 (2), 329 (1954).
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HOUGHTON, D., MILLAR, R. Spread of the Ascidian, Styela mammiculata Carlisle. Nature 185, 862 (1960). https://doi.org/10.1038/185862b0
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DOI: https://doi.org/10.1038/185862b0
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