Genus
Ordovicidium Tappan et Loeblich, 1971
Aiheeseen liittyvät julkaisut
Uutela, A., Tynni, R. 1991. Ordovician acritarchs from the Rapla borehole, Estonia. Geological Survey of Finland. Bulletin 353, 1-135.
Bockelie, T. G., Kjellström, G. 1979. Middle Ordovician acritarchs from the island of Odinsholm, Estonia. GFF 101, 3, 205-216. DOI:10.1080/11035897909448574
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.
Eisenack, A. 1959. Neotypen baltischer Silur-Hystrichospharen und neue Arten. Palaeontographica 112, 93–211.
List of species
1. Ordovicidium aequifurcatum (Kjellström, 1971) emend Loeblich et Tappan, 1978 | Keila Stage→Pirgu Stage
4. Ordovicidium groetlingboense (Kjellström, 1971) emend. Loeblich et Tappan, 1978 | Lasnamägi Stage→Pirgu Stage
5. Ordovicidium heteromorphicum (Kjellström, 1971) emend. Loeblich et Tappan, 1978 | Aseri Stage→Pirgu Stage
7. Ordovicidium nudum (Eisenack, 1959) emend. Loeblich et Tappan, 1978 | Lasnamägi Stage→Pirgu Stage
8. Ordovicidium paucifurcatum (Eisenack, 1959) | Idavere Substage
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