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Eodinia poulsenii
From Fensome et al., 2019:
Eodinia poulsenii Barski, 2002, p.45,48–49, text-figs.4A–B, pl.1, figs.1–6; pl.2, figs.1–5. Holotype: Barski, 2002, pl.1, figs.1–2. Age: Bathonian.
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Original description (Barski, 2002):
Eodinia poulseni sp. nov.
(Pl. 1, figs 1–6)
Derivation of name. Eodinia poulseni is named after Dr Niels Erik Poulsen (Geological Survey of Denmark and Greenland), the author’s first teacher in Jurassic dinoflagellate cysts.
Shape. Polygonal with a conical hypocyst and flat epicyst where a small apical protrusion is formed by the ectophragm.
Wall relationship. Cyst holocavate. Autophragm and ectophragm are developed uniformly around the whole cyst.
Wall features. Autophragm smooth to scabrate. Ectophragm continuous, smooth and transparent. The two layers are connected by solid pillars.
Paratabulation. The complete tabulation pattern is difficult to recognise in light microscopy. In SEM a gonyaulacacean sexiform type tabulation is reflected with tabulation formula: ?', 6'', 6c, 6"', 1p, 1"" (Fig. 4). The antapical paraplate is symmetrical.
Archaeopyle. Epicystal. Operculum attached ventrally.
Paracingulum. Indicated by transverse parallel ridges.
Parasulcus. Indicated by a depression on the hypocyst.
Size. Intermediate, see ‘Dimensions’.
Holotype. Plate 1 (fig. 1). Slide C2/103. Co-ordinates: X=300,Y=1118 (upper right corner X=001, Y=0007). Holotype is lodged at the University of Warsaw in the Museum of the Geology Department under catalogue number IGPUW/Df/01/001a. Locality: Ciechocinek IG-2 Borehole, depth 1338.6 m (Fig. 2), Central Poland, Kujawy region.
Paratype 1. Plate 1 (fig. 3). Slide C2/103. Co-ordinates: X=322,Y=1416 (upper right corner X=001, Y=0007). Ciechocinek IG-2 Borehole, depth 1338.6 m (Fig. 2). Cat. No. IGPUW/Df/01/001b.
Paratype 2. Plate 1 (fig. 4). Slide C2/74. Co-ordinates:
X=280,Y=1215 (upper right corner X=001, Y=0007). Ciechocinek IG-2 Borehole, depth 1310.2 m (Fig. 2). Cat. No. IGPUW/Df/01/002.
Description. Isolated, conical hypocysts are typical. The autophragm/ectophragm relationship is clearly seen on the edges of the hypocyst. In the epicyst a small apical protrusion is occasionally discernible. In the hypocysts, the pillar connections are evident in apical view (Pl. 1, fig. 6). Dark-coloured cysts usually show a scabrate autophragm. Common folds on cyst surface blur the tabulation pattern. Under SEM a gonyaulacacean type tabulation is reflected by low, narrow ridges (Pl. 2, figs 1, 2). The antapical paraplate was only seen in a few specimens. It is symmetrical, gonyaulacacean–sexiform type (Pl. 1, fig. 5). In the SEM micrographs of the hypocsts, some trichocyst pores (Pl. 2, fig. 4) are weakly expressed (Gocht, 1975).
Eodinia poulsenii Barski, 2002, p.45,48–49, text-figs.4A–B, pl.1, figs.1–6; pl.2, figs.1–5. Holotype: Barski, 2002, pl.1, figs.1–2. Age: Bathonian.
---------------------------------------------------------------------------------------------------
Original description (Barski, 2002):
Eodinia poulseni sp. nov.
(Pl. 1, figs 1–6)
Derivation of name. Eodinia poulseni is named after Dr Niels Erik Poulsen (Geological Survey of Denmark and Greenland), the author’s first teacher in Jurassic dinoflagellate cysts.
Shape. Polygonal with a conical hypocyst and flat epicyst where a small apical protrusion is formed by the ectophragm.
Wall relationship. Cyst holocavate. Autophragm and ectophragm are developed uniformly around the whole cyst.
Wall features. Autophragm smooth to scabrate. Ectophragm continuous, smooth and transparent. The two layers are connected by solid pillars.
Paratabulation. The complete tabulation pattern is difficult to recognise in light microscopy. In SEM a gonyaulacacean sexiform type tabulation is reflected with tabulation formula: ?', 6'', 6c, 6"', 1p, 1"" (Fig. 4). The antapical paraplate is symmetrical.
Archaeopyle. Epicystal. Operculum attached ventrally.
Paracingulum. Indicated by transverse parallel ridges.
Parasulcus. Indicated by a depression on the hypocyst.
Size. Intermediate, see ‘Dimensions’.
Holotype. Plate 1 (fig. 1). Slide C2/103. Co-ordinates: X=300,Y=1118 (upper right corner X=001, Y=0007). Holotype is lodged at the University of Warsaw in the Museum of the Geology Department under catalogue number IGPUW/Df/01/001a. Locality: Ciechocinek IG-2 Borehole, depth 1338.6 m (Fig. 2), Central Poland, Kujawy region.
Paratype 1. Plate 1 (fig. 3). Slide C2/103. Co-ordinates: X=322,Y=1416 (upper right corner X=001, Y=0007). Ciechocinek IG-2 Borehole, depth 1338.6 m (Fig. 2). Cat. No. IGPUW/Df/01/001b.
Paratype 2. Plate 1 (fig. 4). Slide C2/74. Co-ordinates:
X=280,Y=1215 (upper right corner X=001, Y=0007). Ciechocinek IG-2 Borehole, depth 1310.2 m (Fig. 2). Cat. No. IGPUW/Df/01/002.
Description. Isolated, conical hypocysts are typical. The autophragm/ectophragm relationship is clearly seen on the edges of the hypocyst. In the epicyst a small apical protrusion is occasionally discernible. In the hypocysts, the pillar connections are evident in apical view (Pl. 1, fig. 6). Dark-coloured cysts usually show a scabrate autophragm. Common folds on cyst surface blur the tabulation pattern. Under SEM a gonyaulacacean type tabulation is reflected by low, narrow ridges (Pl. 2, figs 1, 2). The antapical paraplate was only seen in a few specimens. It is symmetrical, gonyaulacacean–sexiform type (Pl. 1, fig. 5). In the SEM micrographs of the hypocsts, some trichocyst pores (Pl. 2, fig. 4) are weakly expressed (Gocht, 1975).