Natura - nature
actualia - actual entities
Mundus Plinius - physical world
naturalia - natural bodies
[crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
Clade neomura Cavalier-Smith, 1987
Domain Eukaryota Chatton, 1925 - eukaryotes
"protists" incertae sedis
Group †Acritarcha Evitt, 1963, incertae sedis [polyphyletic] - acritarchs
Genus †Baltisphaeridium Eisenack, 1958 ex Eisenack, 1959
[†Baltisphaeridium arbusculiferum Downie (1963)]
see Leptobrachion arbusculiferum (Downie, 1963)
[†Baltisphaeridium brevispinosum]
[†Baltisphaeridium denticulatum Stockmans & Willière (1963)]
see Diexallophasis denticulata (Stockmans & Willière, 1963)
[†Baltisphaeridium dilatispinosum Downie (1963)]
see Visbysphaera dilatispinosum (Downie, 1963)
†Baltisphaeridium longispinosumᵀ (Eisenack, 1931)
[†Baltisphaeridium microcladum Downie (1963)]
see Ammonidium microcladum (Downie, 1963)
†Baltisphaeridium muldiensis Le Hérissé (1989)
[†Baltisphaeridium pilar Cramer (1964)]
see Cymbosphaeridium pilar (Cramer, 1964) Lister (1970)
?[†Baltisphaeridium triplodermum Cramer (1966)]
see Eisenackidium triplodermum (Cramer, 1966)
[†Baltisphaeridium visbyense Eisenack (1959)]
see Hoegklintia visbyense (Eisenack, 1959)