Genus
Orthosphaeridium Eisenack, 1968 emend Kjellström, 1971
Selection of related publications
Uutela, A., Tynni, R. 1991. Ordovician acritarchs from the Rapla borehole, Estonia. Geological Survey of Finland. Bulletin 353, 1-135.
Kjellström, G. 1971. Ordovician microplankton (Baltisphaerids) from the Grötlingbo borehole no. 1 in Gotland, Sweden. Sveriges Geologiska Undersökning 655, 1-75.
Kjellström, G. 1971. Middle Ordovician microplankton from the Grötlingbo borehole no. 1 in Gotland, Sweden. Sveriges Geologiska Undersökning 669, 5-35.
List of species
2. Orthosphaeridium chondrododora Loeblich et Tappan, 1971 | Pirgu Stage
8. Orthosphaeridium rectangulare (Eisenack, 1963) emend. Eisenack, 1968 | Pirgu Stage
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Classification