Zoologische Mededelingen, 83 (September 2009)G.C. Williams; L. Lundsten: The nephtheid soft coral genus Gersemia Marenzeller, 1878, with the description of a new species from the northeast Pacific and a review of two additional species (Octocorallia: Alcyonacea)
Systematics

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Gersemia, Litophyton, and Alcyonium

(figs 4C-D)