 Haeckeliella inconstans
Dumitrica, 1973 |  Haliomma beroes
Ehrenberg, 1854 |
 Haliomma macrodoras
Haeckel, 1887 |  Haliommetta miocenica
(Campbell and Clark, 1944) |
 Heliodiscus asteriscus
Haeckel, 1887 |  Heliodiscus echiniscus
Haeckel, 1887 |
 Heliosoma watkinsi
Keany, 1979 |  Heliosphaera radiata
Popofsky, 1912 |
 Helisoma dispar
Blueford, 1982 |  Helotholus praevema
Weaver, 1983 |
 Helotholus vema
Hays, 1965 |  Helotholus? haysi
Lazarus, 1992 |
 Hexacontium (Hexacontella) hootsi
Campbell and Clark , 1944 |  Hexacontium arachnoidale
Hollande and Enjumet, 1960 |
 Hexacontium enthacanthum
Jørgensen, 1900 |  Hexacontium gigantheum
Cortese and Bjørklund, 1998 |
 Hexacontium hexactis
(Stöhr, 1880) |  Hexacontium laevigatum
Haeckel, 1887 |
 Hexacontium melpomene
(Haeckel, 1887) |  Hexacontium pachydermum
Jørgensen, 1900 |
 Hexacontium sp. cf. H. gigantheum
det. Benson, 2003 |  Hexacontium sp. cf. H. heracliti
Benson, 1966 |
 Hexalonche aristarchi
Haeckel, 1887 |  Hexalonche esmarki
Goll and Bjørklund, 1989 |
 Hexalonche philanahedra
Blueford, 1982 |  Hexalonche philosophica
Haeckel, 1887 |
 Hexapyle dodecantha group
Haeckel, 1887 |  Hexastylus dimensivus
Haeckel, 1887 |
 Hexastylus favulosus
Blueford, 1982 |  Hexastylus formosus
Blueford, 1982 |
 Hexastylus thaletis
Haeckel, 1887 |  Hexastylus triaxonius
Haeckel, 1887 |
 Hymeniastrum euclidis
Haeckel, 1887 |
