<strong> A revision of the genus <em> Thouarella </ em> Gray, 1870 (Octocorallia: Primnoidae), including an illustrated dichotomous key, a new species description, and comments on <em> Plumarella </ em> Gray, 1870 and <em> Dasystenella </ em>, Versluys, 1906 </ strong> Author TAYLOR, M. L. Author CAIRNS, S. D. Author AGNEW, D. J. Author ROGERS, A. D. text Zootaxa 2013 2013-01-14 3602 1 1 105 http://dx.doi.org/10.11646/zootaxa.3602.1.1 journal article 10.11646/zootaxa.3602.1.1 1175-5326 5259143 10304FBF-3969-4EFA-83F1-BB8A5E2B37F3 Plumarella superba ( Nutting, 1912 ) Primnodendron superbum Nutting, 1912: 71–72 , pl. 9, fig. 2, 2a; pl. 19, fig. 4 Thouarella ( Amphilaphis ) superba Kükenthal 1919: 412 ; 1924: 291 Thouarella superba Dautova 2007: 299 (sample not seen) Thouarella (Thouarella) superba Cairns & Bayer 2009: 28 (listed); Heifetz et al. 2005: 133 (listed) Plumarella superba Cairns 2011: 13–14 , figs 2C, 9a–l Material examined : Holotype , USNM 50150, R/ V Albatross , Northwestern Pacific Expedition , sta. 4778, Semisopochini Island , western Aleutian Islands , North Pacific , 78–133 m , 5 Jun 1906 . Description See full description in Cairns (2011) . Distribution This species occurs in the Aleutian Islands , possibly to the western boreal Pacific , Sakhalin Island ( Dautova 2007 ) at depths from 29–133 m . Remarks The gross morphology of the colony is dichotomously uniplanar, with clear dorsal and ventral faces. The branches have branchlets on all sides in a bottlebrush arrangement, however, ventral and dorsal branchlets are much shorter than lateral branchlets. The lack of a keel on the inner surface of the marginals suggests that this species is a Plumarella , as the genus description of Plumarella is now known to include bottlebrush colonies and specifically species with a smooth inner marginal surface, i.e. unkeeled ( Cairns, 2010 ).