Phycologia Volume 56, Issue 4 cover showing Pleodorina sphaerica.  Photograph by Hisayoshi Nozaki.

The recently rediscovered volvocine species Pleodorina sphaerica appeared on the cover of the journal it was reported in, Phycologia. The journal’s website shows only a thumbnail of the photo, so I emailed the publisher to request a higher-resolution version, which they kindly supplied.