Hymedesmiidae Topsent, 1928
Hymedesmia acerata (Topsent, 1904)
Hymedesmia aequata Lundbeck, 1910
Hymedesmia aequatus Lundbeck, 1910
Hymedesmia agariciicola van Soest, 1984
Hymedesmia anisostrongyloxea Bergquist & Fromont, 1988
Hymedesmia antarctica Boury-Esnault & van Beveren, 1982
Hymedesmia armiger (Bowerbank, 1882)
Hymedesmia armigera (Bowerbank, 1882)
Hymedesmia arndti (de Laubenfels, 1930)
Hymedesmia atlantica Topsent, 1928
Hymedesmia aurantiaca Lévi, 1963
Hymedesmia australiensis (Hentschel, 1911)
Hymedesmia australis (Bergquist & Fromont, 1988)
Hymedesmia baculifera (Topsent, 1901)
Hymedesmia basiclavata Topsent, 1928
Hymedesmia basispinosa Lundbeck, 1910
Hymedesmia biscutella (Topsent, 1904)
Hymedesmia bocki Alander, 1942
Hymedesmia bonairensis van Soest, 2009
Hymedesmia bowerbanki Lundbeck, 1910
Hymedesmia brachyrhabda Lévi & Lévi, 1983
Hymedesmia bractea Lundbeck, 1910
Hymedesmia brepha
Hymedesmia campechiana Topsent, 1889
Hymedesmia canadenis Ginn, Logan, Thomas & van Soest, 1998
Hymedesmia canadensis Ginn, Logan, Thomas & van Soest, 1998
Hymedesmia caribica Lehnert & van Soest, 1996
Hymedesmia castanea Sarà, 1964
Hymedesmia chlorosa Alander, 1942
Hymedesmia clavigera Lundbeck, 1910
Hymedesmia cohesibacilla Goodwin & Picton, 2009
Hymedesmia consanguinea Lundbeck, 1910
Hymedesmia cordichela Alander, 1942
Hymedesmia coriacea (Fristedt, 1885)
Hymedesmia crami Goodwin & Picton, 2009
Hymedesmia cratera Goodwin & Picton, 2009
Hymedesmia crelloides Burton & Rao, 1932
Hymedesmia crux (Schmidt, 1875)
Hymedesmia curacaoensis van Soest, 1984
Hymedesmia curvichela Lundbeck, 1910
Hymedesmia decepta (Kirkpatrick, 1907)
Hymedesmia dendyi Burton, 1930
Hymedesmia depressa Topsent, 1928
Hymedesmia dermata Lundbeck, 1910
Hymedesmia dichela (Hentschel, 1911)
Hymedesmia digitata Lundbeck, 1910
Hymedesmia donsi Alander, 1937
Hymedesmia dubia Lundbeck, 1910
Hymedesmia ebria Alander, 1937
Hymedesmia filans (Schmidt, 1868)
Hymedesmia filifera Schmidt, 1875
Hymedesmia flaccida Topsent, 1928
Hymedesmia fristedti (Topsent, 1916)
Hymedesmia gaussiana Hentschel, 1914
Hymedesmia gibbosa Goodwin, Picton & van Soest, 2011
Hymedesmia gisleni Alander, 1942
Hymedesmia gracilisigma Topsent, 1928
Hymedesmia grandis Lundbeck, 1910
Hymedesmia gregalis Koltun, 1970
Hymedesmia gunhildae Alander, 1942
Hymedesmia gustafsoni Alander, 1942
Hymedesmia hallmanni Topsent, 1928
Hymedesmia helgae Stephens, 1921
Hymedesmia hibernica Stephens, 1916
Hymedesmia indivisa Topsent, 1928
Hymedesmia (Stylopus) indivisus (Topsent)
Hymedesmia inflata Vacelet, 1969
Hymedesmia irregularis Lundbeck, 1910
Hymedesmia jamaicensis van Soest, 1984
Hymedesmia jecusculum (Bowerbank, 1866)
Hymedesmia jugalis Topsent, 1928
Hymedesmia koehleri (Topsent, 1896)
Hymedesmia lacera Lundbeck, 1910
Hymedesmia laevistylus Lundbeck, 1910
Hymedesmia lamina Lundbeck, 1910
Hymedesmia lancifera (Topsent, 1906)
Hymedesmia latrunculioides Lundbeck, 1910
Hymedesmia lenta Descatoire, 1966
Hymedesmia leptochela Hentschel, 1914
Hymedesmia levis Lundbeck, 1910
Hymedesmia lieberkuhni Burton, 1930
Hymedesmia lissostyla (Bergquist & Fromont, 1988)
Hymedesmia lobichela Topsent, 1928
Hymedesmia longistylus Lundbeck, 1910
Hymedesmia longurius Lundbeck, 1910
Hymedesmia lundbecki Dendy, 1924
Hymedesmia macrosigma Lundbeck, 1910
Hymedesmia mamillaris (Fristedt, 1885)
Hymedesmia mannarensis Thomas, 1970
Hymedesmia manubriata (Topsent, 1928)
Hymedesmia mariondufresni Boury-Esnault & van Beveren, 1982
Hymedesmia matthesi Arndt, 1941
Hymedesmia mertoni Hentschel, 1912
Hymedesmia microchela Alander, 1942
Hymedesmia microstronglyla Bergquist & Fromont, 1988
Hymedesmia microstrongyla Bergquist & Fromont, 1988
Hymedesmia minuta Alander, 1935
Hymedesmia mollis Lundbeck, 1910
Hymedesmia mucronata (Topsent, 1904)
Hymedesmia mucronella Lundbeck, 1910
Hymedesmia mucronota (Topsent, 1904)
Hymedesmia murrayi Burton, 1959
Hymedesmia mutabilis Topsent, 1904
Hymedesmia nigrescens (Topsent, 1925)
Hymedesmia norvegica Thiele, 1903
Hymedesmia nummota de Laubenfels, 1936
Hymedesmia nummulus Lundbeck, 1910
Hymedesmia obtusata (Topsent, 1904)
Hymedesmia occulta Bowerbank in Norman, 1869
Hymedesmia oculifer (Hentschel, 1911)
Hymedesmia oculifera (Hentschel, 1911)
Hymedesmia odhneri (Alander, 1942)
Hymedesmia omissa Topsent, 1938
Hymedesmia orientalis Koltun, 1962
Hymedesmia oxneri Topsent, 1928
Hymedesmia pachychela Topsent, 1928
Hymedesmia palmatichela Topsent, 1928
Hymedesmia palmatichelifera van Soest, 1984
Hymedesmia pansa Bowerbank, 1882
Hymedesmia parva Stephens, 1915
Hymedesmia parvispicula Burton & Rao, 1932
Hymedesmia paupertas (Bowerbank, 1866)
Hymedesmia peachi Bowerbank, 1882
Hymedesmia peachii Bowerbank, 1882
Hymedesmia pennata Brøndsted, 1932
Hymedesmia perforata Lundbeck, 1910
Hymedesmia pilata Bowerbank, 1882
Hymedesmia planca Lundbeck, 1910
Hymedesmia planisigma Topsent, 1928
Hymedesmia platychela Lundbeck, 1910
Hymedesmia plicata Topsent, 1928
Hymedesmia poicilacantha Alander, 1942
Hymedesmia primitiva Lundbeck, 1910
Hymedesmia procumbens Lundbeck, 1910
Hymedesmia prostrata Thiele, 1903
Hymedesmia proteida Schmidt, 1875
Hymedesmia proxima Lundbeck, 1910
Hymedesmia pugio Lundbeck, 1910
Hymedesmia pulposus (Topsent, 1925)
Hymedesmia pustula (Fristedt, 1887)
Hymedesmia rathlinia Goodwin & Picton, 2009
Hymedesmia rectirhaphis (Pulitzer-Finali, 1983)
Hymedesmia rhaphigena (Topsent, 1904)
Hymedesmia rissoi Topsent, 1936
Hymedesmia rugosa Lundbeck, 1910
Hymedesmia saccea (Schmidt, 1864)
Hymedesmia senegalensis Lévi, 1952
Hymedesmia serrulata Vacelet, 1969
Hymedesmia similis Lundbeck, 1910
Hymedesmia simillima Lundbeck, 1910
Hymedesmia spiniarcuata Lévi & Lévi, 1983
Hymedesmia spinosa Stephens, 1916
Hymedesmia splenium Lundbeck, 1910
Hymedesmia stellifera Goodwin & Picton, 2009
Hymedesmia stephensi Burton, 1930
Hymedesmia stoneae Goodwin, Picton & van Soest, 2011
Hymedesmia storea Lundbeck, 1910
Hymedesmia stylata Lundbeck, 1910
Hymedesmia stylifer Alander, 1942
Hymedesmia stylifera (Alander, 1942)
Hymedesmia stylophora Thomas, 1970
Hymedesmia tendali Goodwin, Picton & van Soest, 2011
Hymedesmia tenuicula Lundbeck, 1910
Hymedesmia tenuisigma Lundbeck, 1910
Hymedesmia tenuissima (Dendy, 1905)
Hymedesmia thielei Alander, 1942
Hymedesmia tornotata Lundbeck, 1910
Hymedesmia trichoma Lundbeck, 1910
Hymedesmia truncata Lundbeck, 1910
Hymedesmia uchinourensis Hoshino, 1981
Hymedesmia umbelliformis Goodwin & Picton, 2009
Hymedesmia unguifera Burton, 1929
Hymedesmia valentinae Goodwin, Picton & van Soest, 2011
Hymedesmia velata Topsent, 1928
Hymedesmia veneta (Schmidt, 1862)
Hymedesmia verrucosa Lundbeck, 1910
Hymedesmia versicolor (Topsent, 1893)
Hymedesmia vomerula Topsent, 1928
Hymedesmia xavierae Goodwin, Picton & van Soest, 2011
Hymedesmia zetlandica Bowerbank, 1864