WoRMS taxon details

Hydractiniidae L. Agassiz, 1862

1601  (urn:lsid:marinespecies.org:taxname:1601)

accepted
Family
Clavidae McCrady, 1859 · unaccepted (synonym)
Janariidae Stechow, 1921 · unaccepted > junior subjective synonym

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  1. Genus Bouillonactinia Miglietta, McNally & Cunningham, 2010
  2. Genus Clava Gmelin, 1791
  3. Genus Clavactinia Thornely, 1904
  4. Genus Cnidostoma Vanhöffen, 1911
  5. Genus Distichozoon Cairns, 2015
  6. Genus Fiordlandia Schuchert, 1996
  7. Genus Hydractinia Van Beneden, 1844
  8. Genus Hydrissa Stechow, 1921
  9. Genus Hydrocorella Stechow, 1921
  10. Genus Janaria Stechow, 1921
  11. Genus Latebrahydra Calder & Watling, 2021
  12. Genus Oorhiza Mereschowsky, 1878
  13. Genus Parahydractinia Xu & Huang, 2006
  14. Genus Podocoryna M. Sars, 1846
  15. Genus Schuchertinia Miglietta, McNally & Cunningham, 2010
  16. Genus Stylactis Allman, 1864
  17. Genus Archaeoceania Picard & Rahm, 1954 accepted as Cnidostoma Vanhöffen, 1911 (synonym)
  18. Genus Calycidion Fewkes, 1882 accepted as Podocoryna M. Sars, 1846 (synonym)
  19. Genus Cionistes Wright, 1861 accepted as Hydractinia Van Beneden, 1844 (synonym)
  20. Genus Corynopsis Allman, 1864 accepted as Podocoryna M. Sars, 1846 (synonym)
  21. Genus Cytaeandra Haeckel, 1879 accepted as Podocoryna M. Sars, 1846 (synonym)
  22. Genus Dysmorphosa Philippi, 1842 accepted as Podocoryna M. Sars, 1846 (synonym)
  23. Genus Echinochorium Hassall, 1841 accepted as Hydractinia Van Beneden, 1844 (unaccepted > junior subjective synonym)
  24. Genus Halorhiza Stechow, 1962 accepted as Hydractinia Van Beneden, 1844
  25. Genus Hydractomma Stechow, 1921 accepted as Podocoryna M. Sars, 1846 (unaccepted > junior subjective synonym)
  26. Genus Hydrodendrium Nutting, 1906 accepted as Hydractinia Van Beneden, 1844 (synonym)
  27. Genus Hydronema Stechow, 1921 accepted as Hydractinia Van Beneden, 1844 (invalid junior homonym of Hydronema Martynow, 1914 [Trichoptera])
  28. Genus Nuttingia Stechow, 1909 accepted as Hydractinia Van Beneden, 1844 (invalid replacement name for Hydrodendrium Nutting, 1905)
  29. Genus Podocorella Stechow, 1921 accepted as Hydractinia Van Beneden, 1844
  30. Genus Podocoryne Lütken, 1850 accepted as Podocoryna M. Sars, 1846 (unaccepted > misspelling)
  31. Genus Polyhydra Stechow, 1962 accepted as Hydrocorella Stechow, 1921 (unaccepted > junior subjective synonym)
  32. Genus Rhizocline Allman, 1864 accepted as Podocoryna M. Sars, 1846 (synonym)
  33. Genus Stylactaria Stechow, 1921 accepted as Stylactis Allman, 1864 (synonym)
  34. Genus Styllactis Allman, 1864 accepted as Stylactis Allman, 1864 (unaccepted > misspelling)
  35. Genus Synhydra Quatrefages, 1843 accepted as Hydractinia Van Beneden, 1844 (not in use)
marine, brackish, fresh, terrestrial
recent + fossil
Agassiz, L. (1862). Contributions to the natural history of the United States of America. <em>Little Brown, Boston.</em> 4: 1-380, pls 1-19., available online at https://www.biodiversitylibrary.org/page/16068829
page(s): 339 [details]   
Taxonomy Several genera of the Hydractiniidae have been redefined by Miglietta et al (2010, 2012) based on molecular phylogenies....  
Taxonomy Several genera of the Hydractiniidae have been redefined by Miglietta et al (2010, 2012) based on molecular phylogenies. Many of these genera are now not diagnosable by morphological traits. Moreover, not all species were included in the phylogeny and thus for some Hydractinia species it is unclear to which genus they belong. If it is unclear to what genus a hydractiniid species belongs, then Hydractinia should be selected as default. More revisory work is clearly needed to obtain a stable system [details]
Schuchert, P. (2024). World Hydrozoa Database. Hydractiniidae L. Agassiz, 1862. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1601 on 2024-04-18
Date
action
by
2004-12-21 15:54:05Z
created
db_admin
2009-04-28 12:00:23Z
changed
2010-04-26 11:37:38Z
changed
2016-07-07 13:28:03Z
changed

Creative Commons License The webpage text is licensed under a Creative Commons Attribution 4.0 License


original description Agassiz, L. (1862). Contributions to the natural history of the United States of America. <em>Little Brown, Boston.</em> 4: 1-380, pls 1-19., available online at https://www.biodiversitylibrary.org/page/16068829
page(s): 339 [details]   

original description  (of Janariidae Stechow, 1921) Stechow E. (1921c). Neue Gruppen skelettbildender Hydrozoen und Verwandtschaftsbeziehungen rezenter und fossiler Formen. <em>Verhandlungen der deutschen zoologischen Gesellschaft.</em> 26: 29-31., available online at https://www.biodiversitylibrary.org/page/47281896
page(s): 30 [details]   

context source (Hexacorallia) Fautin, Daphne G. (2013). Hexacorallians of the World. (look up in IMIS[details]   

basis of record Bouillon, J.; Boero, F. (2000). Synopsis of the families and genera of the Hydromedusae of the world, with a list of the worldwide species. <i>Thalassia Salent. 24</i>: 47-296 (look up in IMIS[details]   

redescription Schuchert, P. (2008). The European athecate hydroids and their medusae (Hydrozoa, Cnidaria): Filifera part 3. <em>Revue suisse de Zoologie.</em> 115: 221-302., available online at https://www.biodiversitylibrary.org/page/41183893
page(s): 223 [details]  OpenAccess publication 
 
 Present  Inaccurate  Introduced: alien  Containing type locality 
From editor or global species database
Diagnosis Hydroids sessile, hydranths often polymorphic, usually epizootic; hydrorhiza either perisarc-covered stolonal tubes, or as an encrusting mat resulting from the coalescence of the stolonal system, either covered by a common layer of perisarc or with naked coenosarc; in some genera the hydrorhizal mat is reinforced by a calcareous skeleton; frequently with chitinous or calcareous spines forming sometimes pillars and branches, sometimes with protective tubes overarching the hydranths; gastrozooids either with one or several whorls of filiform tentacles beneath hypostome, or with scattered tentacles on the upper half of the body, exceptionally with one or two tentacles only; dactylozooids, when present, with no tentacles. Gonophores typically borne on gonozooids, these with one or more whorls of filiform tentacles or without tentacles and mouth (= blastostyles), giving rise to fixed sporosacs, eumedusoids, or free medusae.
Medusa umbrella more or less bell-shaped, with or without slight apical process; manubrium tubular to sac-shaped, not extending beyond bell margin; with or without gastric peduncle; mouth with four simple or branched oral lips drawn out to form arms with terminal nematocyst clusters; four, eight, or more, solid, marginal tentacles, tentacles not in groups; four radial canals and circular canal; gonads on manubrium, interradial, sometimes extending along basal, perradial protrusions of the manubrium; with or without ocelli. [details]

Taxonomy Several genera of the Hydractiniidae have been redefined by Miglietta et al (2010, 2012) based on molecular phylogenies. Many of these genera are now not diagnosable by morphological traits. Moreover, not all species were included in the phylogeny and thus for some Hydractinia species it is unclear to which genus they belong. If it is unclear to what genus a hydractiniid species belongs, then Hydractinia should be selected as default. More revisory work is clearly needed to obtain a stable system [details]
LanguageName 
Japanese クラバ科 [from synonym]ウミヒドラ科  [details]