Desmocysta DUXBURY 1983

Original diagnosis:

"Spheroidal to ovoidal dinoflagellate cysts. Paratabulation is absent except where indicated by a two-paraplate, precingular archeopyle, whose precise paraplate equivalence may not be discerned. Long, fine filaments extend from the antapex." - From Duxbury (1983, p. 43).



Desmocysta plekta DUXBURY 1983

Holotype
Pl. 8, fig(s). 11
NHM registration number: FD118(1)
 

Transmitted light images:

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Dorsal face in high focus
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Optical section
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Ventral face in low focus
 

Original diagnosis:

"A spheroidal to ovoidal dinoflagellate cyst species which always displays a distinct antapical protrusion and which may display a similar protrusion at the apex. A large, two paraplate, precingular archeopyle is invariably present and this is the only expression of paratabulation in an otherwise featureless cyst. Long, fine filaments (usually 10 or more) extend from a small area at the antapex and these may be more than twice the length of the capsule. These are usually tangled to some extent and may form a continuous 'rope'. The filaments terminate in a granular, amorphous mass." - From Duxbury (1983, p. 45).