Acantholithium Haeckel, 1887 (original description)
Acanthometrella Haeckel, 1887 (original description)
Acanthonarium Haeckel, 1887 (original description)
Acanthonidium Haeckel, 1887 (original description)
Acontasparium Haeckel, 1887 (original description)
Acontaspidium Haeckel, 1887 (original description)
Acostaurus Haeckel, 1887 (original description)
Actinelarium Haeckel, 1887 (original description)
Actinelidium Haeckel, 1887 (original description)
Actinelonium Haeckel, 1887 (original description)
Actinommantha Haeckel, 1887 (original description)
Actinommetta Haeckel, 1887 (original description)
Actinommilla Haeckel, 1887 (original description)
Actinommura Haeckel, 1887 (original description)
Actiprunum Haeckel, 1887 (original description)
Amphibelithium Haeckel, 1887 (original description)
Amphibelonium Haeckel, 1887 (original description)
Amphibrachella Haeckel, 1887 (original description)
Amphibrachidium Haeckel, 1887 (original description)
Amphibrachoma Haeckel, 1887 (original description)
Amphibrachura Haeckel, 1887 (original description)
Amphicraspedina Haeckel, 1887 (original description)
Amphicraspedon Haeckel, 1887 (original description)
Amphicraspedula Haeckel, 1887 (original description)
Amphiloncharium Haeckel, 1887 (original description)
Amphilonchidium Haeckel, 1887 (original description)
Amphipylissa Haeckel, 1887 (original description)
Amphipylura Haeckel, 1887 (original description)
Amphirrhopalium Haeckel, 1887 (original description)
Amphirrhopalum Haeckel, 1887 accepted as Amphirhopalum Haeckel, 1881 (original description)
Amphirrhopella Haeckel, 1887 (original description)
Amphirrhopoma Haeckel, 1887 (original description)
Amphisphaerantha Haeckel, 1887 (original description)
Amphisphaeridium Haeckel, 1887 (original description)
Amphisphaerissa Haeckel, 1887 (original description)
Amphisphaeromma Haeckel, 1887 (original description)
Amphitholissa Haeckel, 1887 (original description)
Amphitholonium Haeckel, 1887 (original description)
Amphitholura Haeckel, 1887 (original description)
Amphitholus Haeckel, 1887 (original description)
Anthomma Haeckel, 1887 (original description)
Arachnosphaerella Haeckel, 1887 (original description)
Arachnosphaeromma Haeckel, 1887 (original description)
Astractinium Haeckel, 1887 (original description)
Astracturium Haeckel, 1887 (original description)
Astroloncharium Haeckel, 1887 (original description)
Astrolonchidium Haeckel, 1887 (original description)
Astrophacetta Haeckel, 1887 (original description)
Astrophacilla Haeckel, 1887 (original description)
Astrophacomma Haeckel, 1887 (original description)
Astrophacura Haeckel, 1887 (original description)
Astrosestantha Haeckel, 1887 (original description)
Astrosestilla Haeckel, 1887 (original description)
Astrosestomma Haeckel, 1887 (original description)
Astrosphaera Haeckel, 1887 (original description)
Astrosphaerella Haeckel, 1887 (original description)
Astrosphaeromma Haeckel, 1887 (original description)
Astrostylus Haeckel, 1887 (original description)
Axellipsis Haeckel, 1887 (original description)
Axodiscus Haeckel, 1887 (original description)
Axoprunum Haeckel, 1887 (original description)
Belonostaurus Haeckel, 1887 (original description)
Belonozoum Haeckel, 1887 † (original description)
Caminosphaera Haeckel, 1887 (original description)
Cannartidella Haeckel, 1887 (original description)
Cannartidissa Haeckel, 1887 (original description)
Cannartidium Haeckel, 1887 (original description)
Cannartiscus Haeckel, 1887 (original description)
Cannocapsa Haeckel, 1887 (original description)
Caryatractus Haeckel, 1887 (original description)
Caryodruppula Haeckel, 1887 (original description)
Cenellipsium Haeckel, 1887 (original description)
Cenellipsula Haeckel, 1887 (original description)
Ceriasparium Haeckel, 1887 (original description)
Ceriaspidium Haeckel, 1887 (original description)
Chitonastrella Haeckel, 1887 (original description)
Chitonastromma Haeckel, 1887 (original description)
Choenicosphaera Haeckel, 1887 (original description)
Choenicosphaerium Haeckel, 1887 (original description)
Choenicosphaerula Haeckel, 1887 (original description)
Circoniscus Haeckel, 1887 (original description)
Circosphaera Haeckel, 1879 (original description)
Cladococcalis Haeckel, 1887 (original description)
Cladococcinus Haeckel, 1887 (original description)
Cladococcodes Haeckel, 1887 (original description)
Cladococcurus Haeckel, 1887 (original description)
Clathrosphaerium Haeckel, 1887 (original description)
Clathrosphaerula Haeckel, 1887 (original description)
Collodastrum Haeckel, 1887 (original description)
Collodinium Haeckel, 1887 (original description)
Collodiscus Haeckel, 1887 (original description)
Collophidium Haeckel, 1887 (original description)
Colloprunum Haeckel, 1887 (original description)
Coscinomma Haeckel, 1887 (original description)
Coscinommarium Haeckel, 1887 (original description)
Coscinommidium Haeckel, 1887 (original description)
Coscinommonium Haeckel, 1887 (original description)
Craniaspis Haeckel, 1887 (original description)
Cromyatractium Haeckel, 1887 (original description)
Cromyocarpus Haeckel, 1887 (original description)