Catablema vesicarium (A. Agassiz, 1862 )

Schuchert, Peter, 2018, DNA barcoding of some Pandeidae species (Cnidaria, Hydrozoa, Anthoathecata), Revue suisse de Zoologie 125 (1), pp. 101-127 : 117

publication ID	https://doi.org/10.5281/zenodo.1196029
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scientific name	Catablema vesicarium (A. Agassiz, 1862 )
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Catablema vesicarium (A. Agassiz, 1862) View in CoL

? Medusa campanula Fabricius, 1780: 366 View in CoL .

Catablema campanula View in CoL . ‒ 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 View in CoL ).

Catablema vesicarium View in CoL . ‒ 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 View in CoL , pl. 4 figs 6-7. ‒ Kramp, 1955: 153, synonym.

Tiara conifera Haeckel, 1879: 59 View in CoL . ‒ Kramp, 1955: 152, reexamination of type specimen, synonymy.

in part Perigonimus vesicarius View in CoL . – 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 View Materials ) 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 View Materials ) 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.

References

Agassiz L. 1862. Contributions to the natural history of the United States of America. Vol. IV. Little Brown, Boston, pp. 1 - 380, pls 1 - 19.

Agassiz A. 1865. North American Acalephae. Illustrated Catalogue of the Museum of Comparative Zoology at Harvard College 2: 1 - 234.

Bigelow H. B. 1909 b. Coelenterates from Labrador and Newfoundland, collected by Mr. Owen Bryant from July to October, 1908. Proceedings of the United States National Museum 37 (1706): 301 - 320, pls 30 - 32.

Fabricius O. 1780. Fauna Groenlandica. G. Rothe, Hafniae and Lipsiae, 452 pp., 1 plate. https: // doi. org / 10.5962 / bhl. title. 13489

Haeckel E. 1879. Das System der Medusen. Erster Teil einer Monographie der Medusen. Denkschriften der Medicinisch-Naturwissenschaftlichen Gesellschaft zu Jena 1: XX + 1 - 360, 20 plates. https: // dx. doi. org / 10.5962 / bhl. title. 46856

Hartlaub C. 1914. Craspedote Medusen. Teil 1, Lieferung 3, Tiaridae. Nordisches Plankton 6: 237 - 363.

Kramp P. L. 1926. Medusae. Part II. Anthomedusae. Danish Ingolf Expedition 5 (10): 1 - 102, pls 1 - 2.

Kramp P. L. 1955. A revision of Ernst Haeckel's determinations of a collection of Medusae belonging to the Zoological Museum of Copenhagen. Deep Sea Research 3: 149 - 168.

Kramp P. L. 1959. The Hydromedusae of the Atlantic Ocean and adjacent waters. Dana Report 46: 1 - 283.

Kramp P. L. 1961. Synopsis of the medusae of the world. Journal of the Marine Biological Association of the United Kingdom 40: 1 - 469.

Kramp P. L. 1968. The hydromedusae of the Pacific and Indian Oceans. Sections II and III. Dana Report 72: 1 - 200.

Mayer A. G. 1910. Medusae of the world. Hydromedusae, Vols. I & II. Scyphomedusae, Vol III. Carnegie Institution, Washington, 735 pp., pls 1 - 76.

Naumov D. V. 1969. Hydroids and Hydromedusae of the USSR. Israel Program for scientific translation, 463 pp., 30 pls.

Prudkovsky A. A., Neretina T. V. 2016. The life cycle of Catablema vesicarium (A. Agassiz, 1862) (Hydrozoa, Pandeidae). Polar Biology 39 (3): 533 - 542. https: // dx. doi. org / 10.1007 / s 00300 - 015 - 1805 - x

Schuchert P. 2007. The European athecate hydroids and their medusae (Hydrozoa, Cnidaria): Filifera Part 2. Revue suisse de Zoologie 114 (2): 195 - 396.