Species
Pachysphaeridium christianii (Kjellström, 1976) emend. Ribecai et Tongiorgi, 1999
Synonymy list
1976     Goniosphaeridium christianii, n. sp. — Kjellström , pp. 28, fig. 21
1979     Goniosphaeridium christianii Kjellström, 1976 — Bockelie & Kjellström , pp. 212, fig. 11
1994     Polygonium christianii (Kjellström, 1976) comb. nov. — Sarjeant & Stancliffe , pp. 43
1994     Polygonium christianii (Kjellström, 1976) — Sarjeant & Stancliffe , pp. 363
2023     Pachysphaeridium christianii (Kjellström 1976) Ribecai & Tongiorgi 1999 — Rubinstein & Vaida , fig. Fig. 10K
Selection of related publications
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. 1976. Lower Viruan (Middle Ordovician) microplankton from the Ekön borehole No 1 in Östergötland, Sweden.  Sveriges Geologiska Undersökning   C 724,      1-44.
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Classification
| Organism group | Biota | 
| Protista | |
| Acritarcha | |
| Genus | Pachysphaeridium | 
| Species | christianii | 
| mochtiense | |
| pachyconcha | |
| robustum | 
References based on distribution
- Bockelie & Kjellström, 1979 Osmussaar 1 Uhaku Stage
- Kjellström, 1976 Motala Ekön borehole 101.55 - 102.06 Viru Series