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- Modern Dinocyst Key
- brown cysts
- round brown
- Cyst of Protoperidinium conicoides
Cyst of Protoperidinium conicoides
Zonneveld, K.A.F. and Pospelova V. (2015). A determination key for modern dinoflagellate cysts. Palynology 39 (3), 387- 409.
dorsal view
photo by Karin Zonneveld
Field characteristics
Cyst of Protoperidnium conicoides (Paulsen 1905) Balech 1974.
Field characteristics:
Proximate cyst of spherical shape, with a circular outline in dorsal view. The autophragm is brown in colour, thin, with a smooth to microgranulate surface. Archeopyle is intercalary (2a’) of symmetrically hexagonal to subtrapezoidal shape. No other indication of tabulation.
Dimensions: Cyst body diamater: 29 to 54 µm.
Motile affinity: Protoperidinium conicoides (Paulsen 1905) Balech 1974.
Cyst-theca relationship: Wall and Dale, 1968
Stratigraphic range: Upper Miocene to Recent.
Comparison with other species: The only character on which you can recognise this species is its archeopyle form. Often the cysts are folded and you can’t determine the species.
Field characteristics:
Proximate cyst of spherical shape, with a circular outline in dorsal view. The autophragm is brown in colour, thin, with a smooth to microgranulate surface. Archeopyle is intercalary (2a’) of symmetrically hexagonal to subtrapezoidal shape. No other indication of tabulation.
Dimensions: Cyst body diamater: 29 to 54 µm.
Motile affinity: Protoperidinium conicoides (Paulsen 1905) Balech 1974.
Cyst-theca relationship: Wall and Dale, 1968
Stratigraphic range: Upper Miocene to Recent.
Comparison with other species: The only character on which you can recognise this species is its archeopyle form. Often the cysts are folded and you can’t determine the species.