New additions to the shallow-water hydroids (Cnidaria: Hydrozoa) of the French Lesser Antilles: Martinique Author Galea, Horia R. text Zootaxa 2013 3686 1 1 50 journal article 37008 10.11646/zootaxa.3686.1.1 b5a2eb3f-2555-41ba-a303-9fac9d2618c3 1175-5326 284148 17A93C58-F09C-484A-A26A-F4F27BC91A6C Heterocoryne caribbensis Welder & Larson, 1986 (Pl. 1G–I; Fig. 2M) Heterocoryne caribbensis Wedler & Larson, 1986 : 75 , fig. 2.― Petersen, 1990 : 132 . Material examined . Stn. 2 , 22.ii.2012 , 3– 13 m , M243 : a fertile colony on sponge (MHNG-INVE-82911). Remarks . After its description by Wedler & Larson (1986) , Petersen (1990) discussed the relationship between Sphaerocoryne Pictet, 1893 and Heterocoryne Wedler & Larson, 1986 , indicating that the trophosome of the latter is solely distinguished from the former through its trifid arrangement of the tentacles (Pl. 1I ). The cnidome of the polyp (not previously reported) is composed of: 1) small [(10.3–11.0)×(6.5–6.8) µm] and large [(17.8–18.7)×(12.6–13.5) µm] stenoteles; 2) desmonemes, (8.2–8.4)×(4.4–4.9) µm. No nematocysts could be found in the medusoid. Geographical distribution . Puerto Rico ( Wedler & Larson 1986 ), Guadeloupe (Galea, unpublished results), Martinique (present study).