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Trioperculodinium
From Williams et al., 2017:
[Trioperculodinium, Drugg, 1970, p. 820
Type species: Trioperculodinium siculum, Drugg, 1970b (text-figs.16F–G)]
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Original description: [Drugg, 1970]:
Description:
Chorate spherical tract possessing a dorsal precingular archaeopyle reflecting the loss of plates 2``, 3`` and 4``. The tract wall is two-layered. The ornamentation consists of intratabular processes which are closed both proximally and distally. There are several processes to each plate area.
Affinities:
This genus is similar to Operculodinium Wall, 1967. Trioperculodinium differs primarily in that the operculum consists of three plates (2``, 3``, and 4``) rather than one plate (3``).
[Trioperculodinium, Drugg, 1970, p. 820
Type species: Trioperculodinium siculum, Drugg, 1970b (text-figs.16F–G)]
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Drugg, 1970]:
Description:
Chorate spherical tract possessing a dorsal precingular archaeopyle reflecting the loss of plates 2``, 3`` and 4``. The tract wall is two-layered. The ornamentation consists of intratabular processes which are closed both proximally and distally. There are several processes to each plate area.
Affinities:
This genus is similar to Operculodinium Wall, 1967. Trioperculodinium differs primarily in that the operculum consists of three plates (2``, 3``, and 4``) rather than one plate (3``).