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Spongodinium delitiense
Spongidinium delitense (Ehrenberg, 1837b, pl.1, figs.1,6) Deflandre, 1936b, p.170–171. Emendation: Lucas-Clark, 1987, p.167, as Spongodinium delitiense.
Originally Peridinium (modern species), subsequently (and now) Spongodinium. Of the two illustrations provided by Ehrenberg (1837b), only his pl.1, fig.6 shows a single specimen, which can thus be accepted as the type. However, the validity/authorship of this name may need to be reconsidered as it appears that Ehrenberg (1837b) did not provide a description.
Holotype: Ehrenberg, 1838, pl.1, figs.1,6, lost
replacement types: O. Wetzel collection, preps. No 360, 553, Deflandre collection, AH 5, 7, 8
Locus typicus: Stevns Klint, Denmark
Stratum typicum: Danian
Translation Wetzel 1933, Deflandre 1936: LPP
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G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999
Spongodinium delitiense (Ehrenberg, 1838) Deflandre, 1936b, emend. Lucas-Clark, 1987. According to Lucas-Clark (1987, p.167), Spongodinium delitiense is large, acavate, subspherical to subpolygonal with a prominent apical horn. The cingulum is marked by two ridges “overgrown” by vesicles or alveoli which form a single, broad-based flange. Wall partly or completely vesicular, having the appearance of enclosing bubbles that are distributed over the entire cyst or may be restricted to parts of it. Outline in dorso-ventral view highly variable, from biconical to subrhombohedral ( with anterolateral angulations formed by the dorsal apical paraplates) to spherical. Paratabulation usually expressed incompletely and indistinctly by parasutural ridges, distribution of vesicles and archeopyle. Archeopyle precingular, formed from the loss of paraplate 3". Size: length 75-130 µm, width 70-112 µm.
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Original description: Deflandre, 1936
Emended description: Lucas-Clark, 1987, p.167
Large acavate, subspherical to subpolygonal cysts with prominent apical horn. Cingulum marked by two ridges "overgrown" by vesicles or "alveoli" which form a single broad-based flange. Wall partly or completely vesicular, i.e., having the appearance of enclosing bubbles that are distributed over the entire cyst or may be restricted to some parts of it.
Outline in dorsal-ventral view highly variable, varying from biconical to sub-rhomboidal (with anterolateral angulations formed by the dorsal apical paraplates) to spherical. Outline in apical view circular with sulcus indicated by a slight indentation or only by a break in cingular flange.
Paratabulation usually expressed incompletely and indistinctly by parasutural ridges, distribution of vesicles, and archeopyle. Paratabulation as described for genus.
Originally Peridinium (modern species), subsequently (and now) Spongodinium. Of the two illustrations provided by Ehrenberg (1837b), only his pl.1, fig.6 shows a single specimen, which can thus be accepted as the type. However, the validity/authorship of this name may need to be reconsidered as it appears that Ehrenberg (1837b) did not provide a description.
Holotype: Ehrenberg, 1838, pl.1, figs.1,6, lost
replacement types: O. Wetzel collection, preps. No 360, 553, Deflandre collection, AH 5, 7, 8
Locus typicus: Stevns Klint, Denmark
Stratum typicum: Danian
Translation Wetzel 1933, Deflandre 1936: LPP
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G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999
Spongodinium delitiense (Ehrenberg, 1838) Deflandre, 1936b, emend. Lucas-Clark, 1987. According to Lucas-Clark (1987, p.167), Spongodinium delitiense is large, acavate, subspherical to subpolygonal with a prominent apical horn. The cingulum is marked by two ridges “overgrown” by vesicles or alveoli which form a single, broad-based flange. Wall partly or completely vesicular, having the appearance of enclosing bubbles that are distributed over the entire cyst or may be restricted to parts of it. Outline in dorso-ventral view highly variable, from biconical to subrhombohedral ( with anterolateral angulations formed by the dorsal apical paraplates) to spherical. Paratabulation usually expressed incompletely and indistinctly by parasutural ridges, distribution of vesicles and archeopyle. Archeopyle precingular, formed from the loss of paraplate 3". Size: length 75-130 µm, width 70-112 µm.
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Original description: Deflandre, 1936
Emended description: Lucas-Clark, 1987, p.167
Large acavate, subspherical to subpolygonal cysts with prominent apical horn. Cingulum marked by two ridges "overgrown" by vesicles or "alveoli" which form a single broad-based flange. Wall partly or completely vesicular, i.e., having the appearance of enclosing bubbles that are distributed over the entire cyst or may be restricted to some parts of it.
Outline in dorsal-ventral view highly variable, varying from biconical to sub-rhomboidal (with anterolateral angulations formed by the dorsal apical paraplates) to spherical. Outline in apical view circular with sulcus indicated by a slight indentation or only by a break in cingular flange.
Paratabulation usually expressed incompletely and indistinctly by parasutural ridges, distribution of vesicles, and archeopyle. Paratabulation as described for genus.