Belongs within: Statocysta.
The Proboscidoidea are a group of hydroids possessing a flared hypostome forming a pregastric cavity (Daly et al. 2007).
Proboscidoidea [Campanulariidae]DB07
| i. s.: PhialuciidaeDB07
| Ophiodes mirabilisH04
| Hypanthea hemisphaericaH04
|--+--+--‘Campanularia’ hincksiiLS09
| | `--‘Orthopyxis’ evertaLS09
| `--+--+--Silicularia roseaLS09
| | `--OrthopyxisLS09
| | |--O. sargassicolaLS09
| | `--+--‘Campanularia’ crenataLS09
| | `--O. integraLS09
| `--+--+--Rhizocaulus verticillatusLS09
| | `--Bonneviella [Bonneviellidae]LS09
| | `--B. regiaLS09
| `--CampanulariaLS09
| |--C. altaPP64
| |--C. asymetrica [=Orthopyxis asymetrica]PP64
| |--C. flexuosaJ79
| |--C. geniculataA64
| |--C. johnstoniA64
| |--C. ptychocyathusH04
| |--C. raridentataA64
| `--C. volubilis (Linnaeus 1758)LS09, L58 [=Sertularia volubilisG20]
`--+--+--‘Eucheilota’ bakeriLS09
| `--Lovenella gracilisLS09
`--+--+--Gonothyraea loveniLS09 [=Laomedea loveniA64]
| `--ObeliaLS09
| | i. s.: O. bispinosaHJ08
| | O. commisuralisR64
| | O. fimbriataG90
| | O. longicanthaZCK75
| | O. luciferaH04
| | O. sphaerulina [=Ephyra sphaerulina]G20
| |--O. dichotoma (Linnaeus 1758)LS09, HJ08 [=Laomedea dichotomaA64; incl. O. australisHJ08]
| `--+--‘Laomedea’ calceoliferaLS09
| `--O. geniculata (Linnaeus 1758)LS09, PO99 [=Laomedea geniculataA64]
`--+--+--‘Clytia’ hummelinckiLS09
| `--+--‘Obelia’ bidentata Clarke 1875LS09, PO99
| `--LaomedeaLS09
| | i. s.: L. angulataPP64
| | L. caliculataA64
| | L. dichotoma [=Campanularia dichotoma; incl. C. gelatinosa]A64
| | L. elegans Risso 1826R26
| | L. tenuisA64
| | L. variabilis Risso 1826R26
| | L. viridis Risso 1826R26
| |--L. flexuosaLS09
| `--+--L. inornataLS09
| `--L. longissima (Pallas 1766)L70 [=Obelia longissimaLS09]
`--ClytiaLS09
| i. s.: C. bakeriJB12
| C. cylindricaB26
| C. edwardsiB79
| C. johnstoniPP64
| C. languidaKBC03
| C. poteriumA64
| C. simplexPO99
| C. volubilisB79
|--C. paulensisLS09
`--+--C. linearisLS09
`--+--C. hemisphaericaLS09
`--+--C. elsaeoswaldaeLS09
`--+--C. gracilisLS09
`--C. noliformisLS09
*Type species of generic name indicated
References
[A64] Allman, G. J. 1864. Report on the present state of our knowledge of the reproductive system in the Hydroida. Report of the British Association for the Advancement of Science 33: 351–426.
[B26] Bigelow, H. B. 1926. Plankton of the offshore waters of the Gulf of Maine. Bulletin of the Bureau of Fisheries 40 (2): 1–509.
[B79] Buss, L. W. 1979. Habitat selection, directional growth and spatial refuges: why colonial animals have more hiding places. In: Larwood, G., & B. R. Rosen (eds) Biology and Systematics of Colonial Organisms pp. 459–497. Academic Press: London.
[DB07] Daly, M., M. R. Brugler, P. Cartwright, A. G. Collins, M. N. Dawson, D. G. Fautin, S. C. France, C. S. McFadden, D. M. Opresko, E. Rodriguez, S. L. Romano & J. L. Stake. 2007. The phylum Cnidaria: a review of phylogenetic patterns and diversity 300 years after Linnaeus. Zootaxa 1668: 127–182.
[G20] Goldfuss, G. A. 1820. Handbuch der Naturgeschichte vol. 3. Handbuch der Zoologie pt 1. Johann Leonhard Schrag: Nürnberg.
[G90] Goy, J. 1990. Preliminary observations on the zooplankton of Shark Bay, Western Australia, with emphasis on medusae and description of a new rhizostome jellyfish (Cnidaria, Scyphozoa). In: Berry, P. F., S. D. Bradshaw & B. R. Wilson (eds) Research in Shark Bay: Report of the France-Australe Bicentenary Expedition Committee pp. 107–113. Western Australian Museum.
[H04] Haeckel, E. 1899–1904. Kunstformen der Natur. Bibliographisches Institut: Leipzig und Wien.
[HJ08] Huisman, J. M., D. S. Jones, F. E. Wells & T. Burton. 2008. Introduced marine biota in Western Australian waters. Records of the Western Australian Museum 25 (1): 1–44.
[J79] Jackson, J. B. C. 1979. Morphological strategies of sessile animals. In: Larwood, G., & B. R. Rosen (eds) Biology and Systematics of Colonial Organisms pp. 499–555. Academic Press: London.
[JB12] Johnson, M. E., & B. G. Baarli. 2012. Development of intertidal biotas through Phanerozoic time. In: Talent, J. A. (ed.) Earth and Life: Global biodiversity, extinction intervals and biogeographic perturbations through time pp. 63–128. Springer.
[KBC03] Kashin, I. A., E. V. Bagaveeva & S. F. Chaplygina. 2003. Fouling communities of hydrotechnical constructions in Nakhodka Bay (Sea of Japan). Russian Journal of Marine Biology 29: 267–283.
[LS09] Leclère, L., P. Schuchert, C. Cruaud, A. Couloux & M. Manuel. 2009. Molecular phylogenetics of Thecata (Hydrozoa, Cnidaria) reveals long-term maintenance of life history traits despite high frequency of recent character changes. Systematic Biology 58 (5): 509–526.
[L70] Leloup, E. 1970. Recherches sur l’ostreiculture dans le bassin de chasse d’Ostende en 1968. Bulletin de l’Institut Royal des Sciences Naturelles de Belgique 46 (6): 1–24.
[L58] Linnaeus, C. 1758. Systema Naturae per Regna Tria Naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis revised 10th ed. vol. 1. Laurentii Salvii: Holmiae.
[PO99] Pagès, F., & C. Orejas. 1999. Medusae, siphonophores and ctenophores of the Magellan region. Scientia Marina 63 (Suppl. 1): 51–57.
[PP64] Peres, J. M., & J. Picard. 1964. Nouveau manuel de bionomie benthique de la mer Mediterranee. Recueil des Travaux de la Station Marine d’Endoume, Bulletin 31 (27): 5–137.
[R26] Risso, A. 1826. Histoire naturelle des principales productions de l’Europe méridionale et particulièrement de celles des environs de Nice et des Alpes maritimes vol. 5. F.-G. Levrault: Paris.
[R64] Russell, H. D. 1964. New England nudibranch notes. Nautilus 78 (2): 37–42.
[ZCK75] Zann, L. P., R. J. Cuffey & C. Kropach. 1975. Feeding behavior of Indo-Australian Hydrophiidae. In: Dunson, W. A. (ed.) The Biology of Sea Snakes pp. 251–265. University Park Press.