URMO taxon details

Hydractinia Van Beneden, 1844

Hydractinia echinata (Fleming, 1818)
Hydractinia echinata (Fleming, 1818)

117117  (urn:lsid:marinespecies.org:taxname:117117)

accepted
Genus
Cionistes Wright, 1861 · unaccepted (synonym)

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  1. Species Hydractinia aculeata (Wagner, 1833)
  2. Species Hydractinia aggregata Fraser, 1911
  3. Species Hydractinia altispina Millard, 1955
  4. Species Hydractinia angusta Hartlaub, 1904
  5. Species Hydractinia arctica (Jäderholm, 1902)
  6. Species Hydractinia arge (Clarke, 1882)
  7. Species Hydractinia armata Fraser, 1940
  8. Species Hydractinia bayeri Hirohito, 1984
  9. Species Hydractinia betkensis (Watson, 1978)
  10. Species Hydractinia brachyurae (Hirohito, 1988)
  11. Species Hydractinia californica Torrey, 1904
  12. Species Hydractinia canalifera Millard, 1957
  13. Species Hydractinia carica Bergh, 1887
  14. Species Hydractinia carolinae Fraser, 1912
  15. Species Hydractinia cryptogonia Hirohito, 1988
  16. Species Hydractinia dendritica Hickson & Gravely, 1907
  17. Species Hydractinia diogenes Millard, 1959
  18. Species Hydractinia disjuncta Fraser, 1938
  19. Species Hydractinia echinata (Fleming, 1828)
  20. Species Hydractinia epispongia Fraser, 1938
  21. Species Hydractinia granulata Hirohito, 1988
  22. Species Hydractinia hancocki Fraser, 1938
  23. Species Hydractinia ingolfi (Kramp, 1932)
  24. Species Hydractinia kaffraria Millard, 1955
  25. Species Hydractinia laevispina Fraser, 1922
  26. Species Hydractinia longispina Fraser, 1938
  27. Species Hydractinia mar (Gasca & Calder, 1993)
  28. Species Hydractinia marsupialia Millard, 1975
  29. Species Hydractinia minoi (Alcock, 1892)
  30. Species Hydractinia monocarpa Allman, 1876
  31. Species Hydractinia monoon (Hirohito, 1988)
  32. Species Hydractinia multispina Fraser, 1938
  33. Species Hydractinia multitentaculata (Millard, 1975)
  34. Species Hydractinia nagaoensis Bouillon, Medel & Peña Cantero, 1997
  35. Species Hydractinia novaezelandiae Schuchert, 1996
  36. Species Hydractinia otagoensis (Schuchert, 1996)
  37. Species Hydractinia pacifica Hartlaub, 1905
  38. Species Hydractinia parvispina Hartlaub, 1905
  39. Species Hydractinia paucispinata Vervoort, 2006
  40. Species Hydractinia phialiformis (Antsulevich, 1983)
  41. Species Hydractinia piscicola (Komai, 1932)
  42. Species Hydractinia polycarpa Fraser, 1938
  43. Species Hydractinia polyclina L. Agassiz, 1860
  44. Species Hydractinia proboscidea (Hincks, 1868)
  45. Species Hydractinia quadrigemina Fraser, 1938
  46. Species Hydractinia rugosa Fraser, 1938
  47. Species Hydractinia sandrae (Wedler & Larson, 1986)
  48. Species Hydractinia sarsii (Steenstrup, 1850)
  49. Species Hydractinia spinipapillaris (Hirohito, 1988)
  50. Species Hydractinia spiralis Goto, 1910
  51. Species Hydractinia symbiolongicarpus Buss & Yund, 1989
  52. Species Hydractinia symbiopollicaris Buss & Yund, 1989
  53. Species Hydractinia thatcheri Chapman, 1931 †
  54. Species Hydractinia valens Fraser, 1941
  55. Species Hydractinia vallini Jäderholm, 1926
  56. Species Hydractinia yerii (Iwasa, 1934)
  57. Species Hydractinia allmanii Bonnevie, 1898 accepted as Schuchertinia allmanii (Bonnevie, 1898) (basionym)
  58. Species Hydractinia americana (Mayer, 1910) accepted as Podocoryna americana (Mayer, 1910) (genus transfer)
  59. Species Hydractinia apicata (Kramp, 1959) accepted as Podocoryna apicata Kramp, 1959
  60. Species Hydractinia areolata Alder, 1862 accepted as Podocoryna areolata (Alder, 1862) (genus transfer)
  61. Species Hydractinia australis (Schuchert, 1996) accepted as Podocoryna australis Schuchert, 1996
  62. Species Hydractinia bella (Hand, 1961) accepted as Podocoryna bella Hand, 1961 (genus transfer)
  63. Species Hydractinia borealis (Mayer, 1900) accepted as Podocoryna borealis (Mayer, 1900) (unaccepted > superseded combination, genus transfer)
  64. Species Hydractinia calderi Bouillon, Medel & Peña Cantero, 1997 accepted as Hydractinia proboscidea (Hincks, 1868) (unaccepted > junior subjective synonym, synonym)
  65. Species Hydractinia carcinicola (Hiro, 1939) accepted as Bouillonactinia carcinicola (Hiro, 1939) (genus transfer)
  66. Species Hydractinia carnea (M. Sars, 1846) accepted as Podocoryna carnea M. Sars, 1846 (unaccepted > superseded combination)
  67. Species Hydractinia claviformis (Bouillon, 1965) accepted as Hydractinia proboscidea (Hincks, 1868) (unaccepted > junior subjective synonym, synonym)
  68. Species Hydractinia conchicola (Yamada, 1947) accepted as Schuchertinia conchicola (Yamada, 1947) (genus transfer)
  69. Species Hydractinia dubia (Mayer, 1900) accepted as Podocoryna dubia (Mayer, 1900)
  70. Species Hydractinia epiconcha Stechow, 1908 accepted as Schuchertinia epiconcha (Stechow, 1908) (basionym)
  71. Species Hydractinia exigua (Haeckel, 1880) accepted as Podocoryna exigua (Haeckel, 1880) (genus transfer)
  72. Species Hydractinia fallax Broch, 1914 accepted as Perarella fallax (Broch, 1914) (basionym)
  73. Species Hydractinia fucicola (Sars, 1857) accepted as Stylactis fucicola (M. Sars, 1857)
  74. Species Hydractinia hayamaensis (Hirohito, 1988) accepted as Podocoryna hayamaensis Hirohito, 1988 (basionym)
  75. Species Hydractinia hooperii (Sigerfoos, 1899) accepted as Bouillonactinia hooperii (Sigerfoos, 1899) (unaccepted > superseded combination, genus transfer)
  76. Species Hydractinia inabai (Hirohito, 1988) accepted as Bouillonactinia misakiensis (Iwasa, 1934) (unaccepted > junior subjective synonym)
  77. Species Hydractinia inermis (Allman, 1872) accepted as Stylactis inermis Allman, 1872 (genus transfer)
  78. Species Hydractinia meteoris (Thiel, 1938) accepted as Paracytaeis meteoris (Thiel, 1938)
  79. Species Hydractinia milleri Torrey, 1902 accepted as Schuchertinia milleri (Torrey, 1902) (basionym)
  80. Species Hydractinia misakiensis (Iwasa, 1934) accepted as Bouillonactinia misakiensis (Iwasa, 1934) (genus transfer)
  81. Species Hydractinia multigranosi (Namikawa, 1991) accepted as Bouillonactinia multigranosi (Namikawa, 1991) (genus transfer)
  82. Species Hydractinia nassa (Millard, 1959) accepted as Cytaeis nassa (Millard, 1959) (genus transfer)
  83. Species Hydractinia ocellata (Agassiz & Mayer, 1902) accepted as Podocoryna ocellata (Agassiz & Mayer, 1902) (misspelling of genus)
  84. Species Hydractinia prolifica Fraser, 1948 accepted as Hydractinia rugosa Fraser, 1938 (unaccepted > junior subjective synonym)
  85. Species Hydractinia pruvoti Motz-Kossowska, 1905 accepted as Podocoryna pruvoti (Motz-Kossowska, 1905)
  86. Species Hydractinia rubricata Schuchert, 1996 accepted as Clavactinia rubricata (Schuchert, 1996) (basionym)
  87. Species Hydractinia selena (Mills, 1976) accepted as Hydractinia americana (Mayer, 1910) accepted as Podocoryna americana (Mayer, 1910) (synonym)
  88. Species Hydractinia serrata Kramp, 1943 accepted as Clavactinia serrata (Kramp, 1943) (basionym)
  89. Species Hydractinia sodalis Stimpson, 1858 accepted as Hydrissa sodalis (Stimpson, 1858) (basionym)
  90. Species Hydractinia tenuis (Browne, 1902) accepted as Podocoryna tenuis (Browne, 1902) (unaccepted > superseded combination)
  91. Species Hydractinia tournieri (Picard & Rahm, 1954) accepted as Cnidostoma fallax Vanhöffen, 1911 (synonym)
  92. Species Hydractinia uchidai (Yamada, 1947) accepted as Schuchertinia uchidai (Yamada, 1947) (unaccepted > superseded combination, genus transfer)
  93. Species Hydractinia uniformis Stampar, Tronolone & Morandini, 2006 accepted as Podocoryna uniformis (Stampar, Tronolone & Morandini, 2006) (unaccepted > superseded combination)
  94. Species Hydractinia humilis Bonnevie, 1898 (uncertain > taxon inquirendum)
  95. Species Hydractinia reticulata (Wright, 1861) (uncertain > taxon inquirendum)
  96. Species Hydractinia siphonis (Stechow, 1921) (uncertain > taxon inquirendum)
marine, brackish, fresh, terrestrial
recent only
Beneden, P.J. van. (1844). Sur les genres Eleutherie et Synhydre. <em>Bulletins de l'Acad�mie Royale des Sciences et Belles-Lettres de Bruxelles.</em> 11: 305-314., available online at https://www.biodiversitylibrary.org/page/15742170
page(s): 314 [details] 
Schuchert, P.; Choong, H.; Galea, H.; Hoeksema, B.; Lindsay, D.; Manko, M.; Pica, D. (2025). World Hydrozoa Database. Hydractinia Van Beneden, 1844. Accessed through: Land J. van der (ed). (2008) UNESCO-IOC Register of Marine Organisms (URMO) at: https://marinespecies.org/urmo/aphia.php?p=taxdetails&id=117117 on 2025-05-23
Land J. van der (ed). (2008). UNESCO-IOC Register of Marine Organisms (URMO). Hydractinia Van Beneden, 1844. Accessed at: https://www.marinespecies.org/urmo/aphia.php?p=taxdetails&id=117117 on 2025-05-23
Date
action
by
2004-12-21 15:54:05Z
created
van der Land, Jacob
2015-01-22 07:49:56Z
changed
Schuchert, Peter
2015-10-12 13:17:30Z
changed
Schuchert, Peter

original description Beneden, P.J. van. (1844). Sur les genres Eleutherie et Synhydre. <em>Bulletins de l'Acad�mie Royale des Sciences et Belles-Lettres de Bruxelles.</em> 11: 305-314., available online at https://www.biodiversitylibrary.org/page/15742170
page(s): 314 [details] 

original description (of Cionistes Wright, 1861) Wright, T. S. (1861). Observations on British Protozoa and zoophytes. <em>The Annals and magazine of natural history; zoology, botany, and geology.</em> 3(8): 120-135., available online at https://www.biodiversitylibrary.org/part/60913#/summary
page(s): 123 [details] 

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

basis of record van der Land, J.; Vervoort, W.; Cairns, S.D.; Schuchert, P. (2001). Hydrozoa, <B><I>in</I></B>: Costello, M.J. <i>et al.</i> (Ed.) (2001). <i>European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels,</i> 50: pp. 112-120 (look up in IMIS) [details] 

additional source NODC. (1997). NODC Taxonomic codes. [details] 

additional source Schuchert, P. (2008). The European athecate hydroids and their medusae (Hydrozoa, Cnidaria): Filifera part 3. <em>Revue suisse de Zoologie.</em> 115: 221-302.
page(s): 223 [details] OpenAccess publication

additional source 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] 
 
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To Biological Information System for Marine Life (BISMaL) 
To European Nucleotide Archive, ENA (Hydractinia) 
To Genbank 
To ITIS
From editor or global species database
Hydractinia echinata (Fleming, 1818)
title="Hydractinia echinata (Fleming, 1818)">
Hydractinia echinata (Fleming, 1818)
Hydractinia echinata Fleming, 1823 and Pagurus bernhardus
title="Hydractinia echinata Fleming, 1823 and Pagurus bernhardus">
Hydractinia echinata Fleming, 1823 and Pagurus bernhardus
Image from typetaxon
Van Beneden (1844, pl. 6)
title="Van Beneden (1844, pl. 6)">
Van Beneden (1844, pl. 6)
Image from typetaxon
Hydractinia aculeata, whole colony on hermit crab
title="Hydractinia aculeata, whole colony on hermit crab">
Hydractinia aculeata, whole colony on hermit crab
Unreviewed
Leloup (1952, fig. 53)
title="Leloup (1952, fig. 53)">
Leloup (1952, fig. 53)
Image from typetaxon