Abstract
Two thecate hydroids, Carpocladus fertilis Vervoort & Watson, 2003 (family Aglaopheniidae Marktanner-Turneretscher, 1890) and Gonaxia constricta (Totton, 1930) (family Gonaxiidae Maggioni, in Galea & Maggioni, 2021), are recorded for the first time from off New Caledonia, thus outside their original area of distribution in New Zealand waters. Specimens of both sexes of C. fertilis occur in the present collection, allowing the first description of its so far unknown female gonothecae. The trophosome of G. constricta, the only known to date, is thoroughly redescribed, pending the discovery of its gonothecae.
References
Bogle, M.A. (1984) Cladocarpoides yucatanicus, a new genus and species of Aglaopheniinae (Coelenterata: Hydroida: Plumulariidae) from Arrowsmith Bank, Yucatan Channel. Bulletin of Marine Science, 34 (1), 135–140.
Collins, A.G. (2000) Towards understanding the phylogenetic history of Hydrozoa: hypothesis testing with 18S gene sequence data. In: Mills, C.E., Boero, F., Migotto, A. & Gili, J.M. (Eds.), Trends in Hydrozoan Biology. Scientia Marina, 64 (Supplement 1), 5–22. https://doi.org/10.3989/scimar.2000.64s15
Cornelius, P.F.S. (1992) Medusa loss in leptolid Hydrozoa (Cnidaria), hydroid rafting, and abbreviated life-cycles among their remote-island faunae: an interim review. Scientia Marina, 56 (2–3), 245–261.
Dawson, E.W. (1992) The coelenterate fauna of the New Zealand region: a handlist for curators, students and ecologists. Occasional papers of the Hutton Foundation, New Zealand, 1, 1–68.
Galea, H.R. (2007) Hydroids and hydromedusae (Cnidaria: Hydrozoa) from the fjords region of southern Chile. Zootaxa, 1597 (1), 1–116. https://doi.org/10.11646/zootaxa.1597.1
Galea, H.R. (2008) On a collection of shallow-water hydroids (Cnidaria: Hydrozoa) from Guadeloupe and Les Saintes, French Lesser Antilles. Zootaxa, 1878 (1), 1–54. https://doi.org/10.11646/zootaxa.1878.1.1
Galea, H.R. (2016) Notes on some sertulariid hydroids (Cnidaria: Hydrozoa) from the tropical western Pacific, with descriptions of nine new species. European Journal of Taxonomy, 218, 1–52. https://doi.org/10.5852/ejt.2016.218
Galea, H.R. (2020) Aglaopheniid hydroids (Cnidaria: Hydrozoa: Aglaopheniidae) from off New Caledonia collected during KANACONO and KANADEEP expeditions of the French Tropical Deep-Sea Benthos Program. European Journal of Taxonomy, 615, 1–47. https://doi.org/10.5852/ejt.2020.615
Galea, H.R. & Maggioni, D. (2021) An integrative study of some species of Gonaxia Vervoort, 1993 from off New Caledonia, with the establishment of Gonaxiidae as a new family of thecate hydroids (Cnidaria: Hydrozoa). Zootaxa, 5004 (3), 401–429. https://doi.org/10.11646/zootaxa.5004.3.1
Hincks, T. (1869) A history of British hydroid zoophytes. John van Voorst, London, 338 pp. https://doi.org/10.5962/bhl.title.1322
Marktanner-Turneretscher, G. (1890) Die Hydroiden des k. k. naturhistorischen Hofmuseums. Annalen des k. k. Naturhistorischen Hofmuseums, 5, 195–286.
Moura C., Lessios H., Cortés J., Nizinski M.S., Reed J., Santos R.S. & Collins A.G. (2018) Hundreds of genetic barcodes of the species-rich hydroid superfamily Plumularioidea (Cnidaria, Medusozoa) provide a guide toward more reliable taxonomy. Scientific Reports, 8, 17986. https://doi.org/10.1038/s41598-018-35528-8
Owen, R. (1843) Lectures on comparative anatomy and physiology of the invertebrate animals, delivered at the Royal College of Surgeons, in 1843. Hunterian Lectures, 1, 1–392. https://doi.org/10.5962/bhl.title.11742
Ralph, P.M. (1961) New Zealand thecate hydroids. Part III. Family Sertulariidae. Transactions of the Royal Society of New Zealand, 88 (4), 749–838.
Stepanjants, S.D. (1979) Gidroidy vod antarktiki i subantarktiki. In: Rezul’taty biologicheskikh issledovanii sovetskikh antarkticheskikh ekspeditsii, 6. Issledovaniya Fauny Morei, 22 (30), 1–99.
Totton, A.K. (1930) Coelenterata. Part V. Hydroida. Natural History Report of the British Antarctic (« Terra Nova ») Expedition, 1910, Zoology, 5 (5), 131–252.
Vervoort, W. (1993) Cnidaria, Hydrozoa, Hydroida: Hydroids from the western Pacific (Philippines, Indonesia and New Caledonia) I. Sertulariidae (Part 1). In: Crosnier, A. (Ed.), Résultats des Campagnes MUSORSTOM. Vol. 11. Mémoires du Muséum national d’Histoire naturelle, Paris, 158, pp. 89–298.
Vervoort, W. & Watson, J.E. (2003) The marine fauna of New Zealand: Leptothecata (Cnidaria: Hydrozoa) (thecate hydroids). NIWA Biodiversity Memoir, 119, 1–538.