Notes on some sertulariid hydroids (Cnidaria: Hydrozoa) from the tropical western Pacific, with descriptions of nine new species Author Galea, Horia R. text European Journal of Taxonomy 2016 2016-08-02 218 1 52 journal article 21896 10.5852/ejt.2016.218 cba502b0-cc06-4252-94f1-3eda754e8183 2118-9773 3840195 A4D7AA38-D18F-4604-A5E0-D965637BD9F8 Sertularia tongensis ( Stechow, 1919 ) Fig. 10E Sertularella tongensis Stechow, 1919: 89 , fig. f 1 –g 1 . Sertularia tongensis – Galea 2010: 18 , fig. 5h–m (synonymy); 2015b: 10, fig. 3s. Material examined MUSORSTOM 9: Stn. CP1265, small colony composed of a few sterile, unbranched stems, up to 1 cm high (MNHN-IK-2012-16592). Remarks As stated by Galea (2010 , 2015b ), this species is immediately recognizable, even in sterile condition, through its alternate hydrothecae whose apertures are closed by two opercular flaps pleated along a median line. Geographical distribution Likely circumglobal in temperate to tropical seas ( Galea 2015b ). The present record is from the Marquesas .