DNA barcoding of some Pandeidae species (Cnidaria, Hydrozoa, Anthoathecata) Author Schuchert, Peter Muséum d'histoire naturelle, CP 6434, CH- 1211 Genève 6, Switzerland, E-mail: peter. schuchert @ ville-ge. ch text Revue suisse de Zoologie 2018 2018-03-31 125 1 101 127 journal article 3917 10.5281/zenodo.1196029 f34e9863-9f62-4f2a-8819-7e6e8fc09403 0035-418 1196029 Catablema vesicarium (A. Agassiz, 1862 ) ? Medusa campanula Fabricius, 1780: 366 . Catablema campanula . ‒ Haeckel, 1879: 63 , pl. 4 figs 4-5. ‒ Kramp, 1955: 153 , re-examined material of Haeckel. Turris vesicaria A. Agassiz, 1862: 97 . ‒ Agassiz, 1865: 164 , figs 261-268. in part Turris vesicaria . – Mayer, 1910: 126 , pl. 12 figs 2-3 (not pl. 13. fig. 7 = L. octona ). Catablema vesicarium . ‒ Bigelow, 1909b: 304 , pl. 30 figs 3-4, pl. 31 fig. 6. – in part Hartlaub, 1914: 315 , figs 263-267. ‒ Kramp, 1926: 87 , pl. 2 figs 10-11. – Kramp 1959: 122 , 208-212, fig. 125. – Kramp, 1961: 96 . – Kramp, 1968: 50 , fig. 132. – Schuchert, 2007: 345 , fig. 64, redescription. ‒ Prudkovsky & Neretina, 2016: 533 , figs 1-8, life cycle. Catablema eurystoma Haeckel, 1879: 64 , pl. 4 figs 6-7. ‒ Kramp, 1955: 153 , synonym. Tiara conifera Haeckel, 1879: 59 . ‒ Kramp, 1955: 152 , reexamination of type specimen, synonymy. in part Perigonimus vesicarius . – Naumov, 1969: 202 ,? not fig. 69. Type locality: Nahant , Massachusetts Bay , USA . Material examined: See Schuchert (2007) . The molecular comparisons of this study included also 16S sequences of the material described in Prudkovsky & Neretina (2016) , as well as of a medusa from the Nuuk-Fjord in Greenland (GenBank KT809324 ) collected 22 June 2010 and identified by Russell Hopcroft. It had about 28-30 tentacles, about as many rudimentary bulbs, and a large apical projection (after data and photos kindly provided by R . Hopcroft). Diagnosis: Catablema medusa with bell up to 25 mm wide and 30 mm high, including the large, globular apical projection; gonads in long, irregular folds, oblique in lateral parts, almost perpendicular in middle part of each quadrant, with or without pits on gonad folds; 24-32 tentacles, rarely up to 48, often with small, rudimentary bulbs between two tentacle pairs; usually with small abaxial ocelli on at least some tentacles or bulbs, sometimes missing; mesenteries short. Hydroid arising from reticulate stolons on bivalves, hydranths stolonal or with very short pedicel only, base of hydranth surrounded by a membranous pseudohydrotheca; hydranth fusiform, up to 0.75 mm long, conical hypostome, 3-8 filiform amphicoronate tentacles in a single whorl. Medusa buds arise from stolons, diameter reaches sizes similar as hydranths, young medusa released with two opposite tentacles only. Description and illustrations: See Schuchert (2007) and Prudkovsky & Neretina (2015). Distribution: An Arctic species, rarely penetrating into boreal regions. Remarks: The medusae identified by Prudkovsky & Neretina (2016) had up to 28 tentacles, matched thus exactly the concept of C. vesicarium given in Kramp (1959) and also in the original description of Agassiz (1862 , 1865 ). Likewise, the 16S and COI sequences of the sample from Greenland (GenBank KT809324 ) are derived from a typical specimen and can also be used as a reliably identified reference specimen and sequence. Although C. nodulosum is likely conspecific with C. vesicarium , it is discussed separately below to allow a better separation and clearer presentation of this morphotype.