URMO Taxon list
Baleum singulare Billard, 1929 accepted as Halecium singulare (Billard, 1929)
Diplocyathus sibogae Billard, 1929 accepted as Hydrodendron sibogae (Billard, 1929)
Halecium amphibolum Watson, 1993
Halecium annulatum Torrey, 1902
Halecium antarcticum Vanhöffen, 1910
Halecium arcticum Ronowicz & Schuchert, 2007
Halecium banyulense Motz-Kossowska, 1912
Halecium beanii (Johnston, 1838)
Halecium beringi Naumov, 1960 accepted as Halecium scutum Clark, 1977
Halecium bermudense Congdon, 1907
Halecium birulai Spassky, 1929
Halecium brashnikowi Linko, 1911
Halecium bruniensis Watson, 1975
Halecium capillaris (Pourtalès, 1867) (uncertain > taxon inquirendum )
Halecium conicum Stechow, 1919
Halecium corrugatissimum Trebilcock, 1928
Halecium corrugatum Nutting, 1899
Halecium crinis Stechow, 1913
Halecium curvicaule Lorenz, 1886
Halecium cymiforme Allman, 1888
Halecium cymosum Fraser, 1935
Halecium delicatulum Coughtrey, 1876
Halecium densum Calkins, 1899
Halecium dichotomum Allman, 1888
Halecium diminutivum Fraser, 1942
Halecium dubium Fraser, 1941
Halecium dufresnae Millard, 1977
Halecium dyssymetrum Billard, 1929
Halecium exiguum Fraser, 1948
Halecium expansum Trebilcock, 1928
Halecium fasciculatum Fraser, 1938
Halecium filicula Allman, 1877
Halecium fjordlandicum Galea, 2007
Halecium flabellatum Fraser, 1935
Halecium flexile Allman, 1888 accepted as Halecium delicatulum Coughtrey, 1876
Halecium flexum Fraser, 1948
Halecium fragile Hodgson, 1950
Halecium fraseri Ralph, 1958
Halecium fruticosum Fraser, 1943 (uncertain > taxon inquirendum )
Halecium galeatum Billard, 1937
Halecium gracile Bale, 1893 accepted as Halecium delicatulum Coughtrey, 1876
Halecium groenlandicum Kramp, 1911
Halecium halecinum (Linnaeus, 1758)
Halecium halecium (Linnaeus, 1758) accepted as Halecium halecinum (Linnaeus, 1758)
Halecium harrimani Nutting, 1901
Halecium humile Pictet, 1893
Halecium incertus Naumov & Stepanjants, 1962
Halecium inhacae Millard, 1958
Halecium insolens Fraser, 1938
Halecium interpolatum Ritchie, 1907
Halecium jaederholmi Vervoort, 1972
Halecium kofoidi Torrey, 1902
Halecium kuekenthali Marktanner-Turneretscher, 1895 accepted as Halecium curvicaule Lorenz, 1886
Halecium labiatum Billard, 1933
Halecium labrosum Alder, 1859
Halecium laeve Kramp, 1932
Halecium lankesteri (Bourne, 1890) accepted as Halecium lankesterii (Bourne, 1890)
Halecium lankesterii (Bourne, 1890)
Halecium lenticulare Trebilcock, 1928
Halecium lightbourni Calder, 1991
Halecium linkoi Antsulevich, 1980
Halecium liouvillei Billard, 1934
Halecium lucium Antsulevich, 1979
Halecium luteum Watson, 1975
Halecium macrocephalum Allman, 1877
Halecium marsupiale Bergh, 1887
Halecium mediterraneum Weismann, 1883
Halecium minor Fraser, 1935 accepted as Halecium permodicum Calder, 2017
Halecium minutum Broch, 1903
Halecium mirabile Schydlowsky, 1902
Halecium mirandus Antsulevich & Regel, 1986
Halecium muricatum (Ellis & Solander, 1786)
Halecium nanum Alder, 1859
Halecium nullinodum Fraser, 1935
Halecium ochotense Linko, 1911
Halecium ornatum Nutting, 1901
Halecium ovatum Totton, 1930
Halecium parvulum Bale, 1888 accepted as Halecium delicatulum Coughtrey, 1876
Halecium paucinodum (Fraser, 1947)
Halecium pearsonenese Watson, 1997
Halecium perexiguum Hirohito, 1995
Halecium permodicum Calder, 2017
Halecium petrosum Stechow, 1919
Halecium plicatocarpum Vervoort & Watson, 2003
Halecium plumosum Hincks, 1868
Halecium profundum Calder & Vervoort, 1998
Halecium pusillum (Sars, 1857)
Halecium pygmaeum Fraser, 1911 accepted as Halecium mirabile Schydlowsky, 1902
Halecium pyriforme Hirohito, 1995
Halecium ralpha Watson & Vervoort, 2001
Halecium reduplicatum (Fraser, 1935)
Halecium reflexum Stechow, 1919 accepted as Halecium conicum Stechow, 1919
Halecium regulare Fraser, 1938
Halecium repens Jäderholm, 1907 accepted as Halecium curvicaule Lorenz, 1886
Halecium reversum Nutting, 1901
Halecium robustum Nutting, 1901 accepted as Halecium harrimani Nutting, 1901
Halecium robustum Pieper, 1884 accepted as Halecium lankesterii (Bourne, 1890)
Halecium scalariformis Billard, 1929
Halecium schneideri Bonnevie, 1898 accepted as Halecium pusillum (Sars, 1857)
Halecium scutum Clark, 1977