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- Modern Dinocyst Key
- transparent cysts
- Septa and processes
- other cysts with septa and processes
- with apical nodge
- Spiniferites alaskensis
Modern Dinocyst Key
Spiniferites alaskensis
Zonneveld, K.A.F. and Pospelova V. (2015). A determination key for modern dinoflagellate cysts. Palynology 39 (3), 387- 407.
dorsal view
Material: Emian, Gulf of Alaska
(Fabienne Marret)
photographs: Karin Zonneveld
Material: Emian, Gulf of Alaska
(Fabienne Marret)
photographs: Karin Zonneveld
cross section
ventral view
Field characteristics
Spiniferites alaskasensis Marret et al., 2001
Field characteristics:
Chorate cyst with ovoid-pear shape, with a pronounced apical boss. The cysts have a thin finely scabrate to granulate wall. Tabulation is expressed by low septa. Processes are relatively long, broad and divided in three pointed ends. Process end with a pointed trifurcation. Archeopyle is precingular (type P).
Dimensions: Cyst body: 26.2 - 36.8 (length) to 23.6 - 31.5 (width) µm; length of processes: 7.5 - 12 µm. Motile affinity: not known.
Stratigraphic range: Emian
Comparison with other species:
S. alaskasense differs from the other Spiniferites species in having a broad processes that end characteristically in three branches.
Field characteristics:
Chorate cyst with ovoid-pear shape, with a pronounced apical boss. The cysts have a thin finely scabrate to granulate wall. Tabulation is expressed by low septa. Processes are relatively long, broad and divided in three pointed ends. Process end with a pointed trifurcation. Archeopyle is precingular (type P).
Dimensions: Cyst body: 26.2 - 36.8 (length) to 23.6 - 31.5 (width) µm; length of processes: 7.5 - 12 µm. Motile affinity: not known.
Stratigraphic range: Emian
Comparison with other species:
S. alaskasense differs from the other Spiniferites species in having a broad processes that end characteristically in three branches.