Hydrozoa taxon details
Hydractiniidae L. Agassiz, 1862
1601 (urn:lsid:marinespecies.org:taxname:1601)
accepted
Family
Clavidae McCrady, 1859 (synonym)
Genus Bouillonactinia Miglietta, McNally & Cunningham, 2010
Genus Clava Gmelin, 1788
Genus Clavactinia Thornely, 1904
Genus Cnidostoma Vanhöffen, 1911
Genus Distichozoon Cairns, 2015
Genus Fiordlandia Schuchert, 1996
Genus Hydractinia Van Beneden, 1844
Genus Hydrissa Stechow, 1922
Genus Hydrocorella Stechow, 1921
Genus Janaria Stechow, 1921
Genus Latebrahydra Calder & Watling, 2021
Genus Parahydractinia Xu & Huang, 2006
Genus Podocoryna M. Sars, 1846
Genus Schuchertinia Miglietta, McNally & Cunningham, 2010
Genus Stylactis Allman, 1864
Genus Cystactinia Brooks, 1964 † (nomen dubium, publication not valid according to rules of ICZN)
Genus Archaeoceania Picard & Rahm, 1954 accepted as Cnidostoma Vanhöffen, 1911 (synonym)
Genus Calycidion Fewkes, 1882 accepted as Podocoryna M. Sars, 1846 (synonym)
Genus Cionistes Wright, 1861 accepted as Hydractinia Van Beneden, 1844 (synonym)
Genus Corynopsis Allman, 1864 accepted as Podocoryna M. Sars, 1846 (synonym)
Genus Cytaeandra Haeckel, 1879 accepted as Podocoryna M. Sars, 1846 (synonym)
Genus Dysmorphosa Philippi, 1842 accepted as Podocoryna M. Sars, 1846 (synonym)
Genus Echinochorium Hassall, 1841 accepted as Hydractinia Van Beneden, 1844
Genus Euhydractinia Broch, 1910 accepted as Hydractinia Van Beneden, 1844
Genus Halorhiza Stechow, 1962 accepted as Hydractinia Van Beneden, 1844
Genus Hydractomma Stechow, 1921 accepted as Podocoryna M. Sars, 1846 (synonym)
Genus Hydroconophora Gregory, 1931 accepted as Hydrocorella Stechow, 1921 (synonym)
Genus Hydrodendrium Nutting, 1906 accepted as Hydractinia Van Beneden, 1844 (synonym)
Genus Hydronema Stechow, 1921 accepted as Hydractinia Van Beneden, 1844 (name preoccupied by Hydronema Martynow, 1914 (Trichoplera))
Genus Nuttingia Stechow, 1909 accepted as Hydractinia Van Beneden, 1844 (invalid replacement name for Hydrodendrium Nutting, 1905)
Genus Podocorella Stechow, 1921 accepted as Hydractinia Van Beneden, 1844
Genus Podocoryne Luetken, 1850 accepted as Podocoryna M. Sars, 1846 (spelling error)
Genus Polyhydra Stechow, 1962 accepted as Hydrocorella Stechow, 1921 (synonym)
Genus Rhizocline Allman, 1864 accepted as Podocoryna M. Sars, 1846 (synonym)
Genus Stylactaria Stechow, 1921 accepted as Stylactis Allman, 1864
Genus Synhydra Quatrefages, 1843 accepted as Hydractinia Van Beneden, 1844
Genus Clava Gmelin, 1788
Genus Clavactinia Thornely, 1904
Genus Cnidostoma Vanhöffen, 1911
Genus Distichozoon Cairns, 2015
Genus Fiordlandia Schuchert, 1996
Genus Hydractinia Van Beneden, 1844
Genus Hydrissa Stechow, 1922
Genus Hydrocorella Stechow, 1921
Genus Janaria Stechow, 1921
Genus Latebrahydra Calder & Watling, 2021
Genus Parahydractinia Xu & Huang, 2006
Genus Podocoryna M. Sars, 1846
Genus Schuchertinia Miglietta, McNally & Cunningham, 2010
Genus Stylactis Allman, 1864
Genus Cystactinia Brooks, 1964 † (nomen dubium, publication not valid according to rules of ICZN)
Genus Archaeoceania Picard & Rahm, 1954 accepted as Cnidostoma Vanhöffen, 1911 (synonym)
Genus Calycidion Fewkes, 1882 accepted as Podocoryna M. Sars, 1846 (synonym)
Genus Cionistes Wright, 1861 accepted as Hydractinia Van Beneden, 1844 (synonym)
Genus Corynopsis Allman, 1864 accepted as Podocoryna M. Sars, 1846 (synonym)
Genus Cytaeandra Haeckel, 1879 accepted as Podocoryna M. Sars, 1846 (synonym)
Genus Dysmorphosa Philippi, 1842 accepted as Podocoryna M. Sars, 1846 (synonym)
Genus Echinochorium Hassall, 1841 accepted as Hydractinia Van Beneden, 1844
Genus Euhydractinia Broch, 1910 accepted as Hydractinia Van Beneden, 1844
Genus Halorhiza Stechow, 1962 accepted as Hydractinia Van Beneden, 1844
Genus Hydractomma Stechow, 1921 accepted as Podocoryna M. Sars, 1846 (synonym)
Genus Hydroconophora Gregory, 1931 accepted as Hydrocorella Stechow, 1921 (synonym)
Genus Hydrodendrium Nutting, 1906 accepted as Hydractinia Van Beneden, 1844 (synonym)
Genus Hydronema Stechow, 1921 accepted as Hydractinia Van Beneden, 1844 (name preoccupied by Hydronema Martynow, 1914 (Trichoplera))
Genus Nuttingia Stechow, 1909 accepted as Hydractinia Van Beneden, 1844 (invalid replacement name for Hydrodendrium Nutting, 1905)
Genus Podocorella Stechow, 1921 accepted as Hydractinia Van Beneden, 1844
Genus Podocoryne Luetken, 1850 accepted as Podocoryna M. Sars, 1846 (spelling error)
Genus Polyhydra Stechow, 1962 accepted as Hydrocorella Stechow, 1921 (synonym)
Genus Rhizocline Allman, 1864 accepted as Podocoryna M. Sars, 1846 (synonym)
Genus Stylactaria Stechow, 1921 accepted as Stylactis Allman, 1864
Genus Synhydra Quatrefages, 1843 accepted as Hydractinia Van Beneden, 1844
marine, brackish, fresh, terrestrial
recent + fossil
Not documented
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. (2021). World Hydrozoa Database. Hydractiniidae L. Agassiz, 1862. Accessed at: https://www.marinespecies.org/hydrozoa/aphia.php?p=taxdetails&id=1601 on 2021-05-07
Date
action
by
2004-12-21 15:54:05Z
created
db_admin
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]
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]
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]