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Dilabidinium
From Fensome et al., 2019:
Dilabidinium Morgenroth et al., 2008, p., p.127. Type: Morgenroth et al., 2008, pl.9, figs.3–4 as Dilabidinium
areolatum.
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Derivation of name: Latin, dilabi, breaking up, in reference to the complex formation of the archeopyle.
Diagnosis: Ovoidal to subspherical cyst with a gonyaulacalean tabulation pattern. Epicyst about equal in size to hypocyst· The tabulation is reflected by sutural lines, where the wail of the cyst is thinner than in the paraplates:.. The sutural lines are devoid of any wall ornamentation. The surface of the paraplates may be ornamented. On the paraplates also intratabular virgae or appendages may occur. Archeopyle: the
cysts do not form an archeopyle consisting of one or a limited number of paraplates, but seem to disintegrate completely by ruptures formed along the sutural lines.
Type species: Dilabinium areolatum sp. nov.
Comparisons: Dilabidinium gen. nov. differs from other dinoflagellate cyst genera, which form complex archeopyles, by breaking up along sutures of a larger number of paraplates, like Homotryblium, in that the break-up does not seem to be limited to the epicyst and, in addition: in the lack of long intratabular processes.
Dilabidinium Morgenroth et al., 2008, p., p.127. Type: Morgenroth et al., 2008, pl.9, figs.3–4 as Dilabidinium
areolatum.
---------------------------------------------------------------------------------------------------
Derivation of name: Latin, dilabi, breaking up, in reference to the complex formation of the archeopyle.
Diagnosis: Ovoidal to subspherical cyst with a gonyaulacalean tabulation pattern. Epicyst about equal in size to hypocyst· The tabulation is reflected by sutural lines, where the wail of the cyst is thinner than in the paraplates:.. The sutural lines are devoid of any wall ornamentation. The surface of the paraplates may be ornamented. On the paraplates also intratabular virgae or appendages may occur. Archeopyle: the
cysts do not form an archeopyle consisting of one or a limited number of paraplates, but seem to disintegrate completely by ruptures formed along the sutural lines.
Type species: Dilabinium areolatum sp. nov.
Comparisons: Dilabidinium gen. nov. differs from other dinoflagellate cyst genera, which form complex archeopyles, by breaking up along sutures of a larger number of paraplates, like Homotryblium, in that the break-up does not seem to be limited to the epicyst and, in addition: in the lack of long intratabular processes.