Abstract
Background and aims – Berkeleya adeliensis was described in 1990 by Medlin, unfortunately with an error in its typification. This note discusses and corrects the error.
 Key results and conclusions – The type locality is in McMurdo Sound, Antarctica, not in Adélie Land where the species was first recorded by Manguin as “Amphipleura rutilans var. antarctica”. Nevertheless, the species does occur in both localities, as shown by published illustrations. Morphometric data are given for Berkeleya species reported from the Antarctic, including the two locations where B. adeliensis occurs.
Highlights
Van Heurck (1896) and Peragallo & Peragallo (1897) retained the tube dwelling genus Berkeleya Grev. separate from Amphipleura Kütz
Medlin illustrated one taxon that could be regarded as a variety of B. rutilans (Trentep. ex Roth) Grunow (Medlin 1990: figs 1, 4, 10–13) but she did not describe this as a new variety; instead she left it unnamed but documented that it was distinct from the nominate form
To establish the true features of Berkeleya rutilans var. antarctica, Medlin was able to float off some specimens from the dried herbarium sheet of material originally collected by Hooker in Berkeley Sound in the Falkland Islands
Summary
Van Heurck (1896) and Peragallo & Peragallo (1897) retained the tube dwelling genus Berkeleya Grev. separate from Amphipleura Kütz. In 1880, Grunow transferred Schizonema antarcticum Harv., a tube dwelling diatom, to Berkeleya. Peragallo (1897) appears to have been the first to use the combination Berkeleya rutilans var. Antarctica Perag., but treated this as a later synonym of the northern hemisphere taxon, Berkeleya rutilans var.
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